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The opening of a game in draughts is not as important as in chess. In chess you need to know many theoretical lines to be able to play at top level. In draughts one has more freedom to choose what to play. Still, it is necessary to have some knowledge of popular openings. It will save you a lot of time if you know how the opening works already. The goals of opening play are:

Getting an interesting game Getting a type of game that you’re good at Getting a line of which you have knowledge

We aren’t interested in changing pieces, of course. Therefore we will only address the sharp lines openings offer. This section will give you an overview of popular openings, but there is lots more to learn about openings. If you want to know more, you can study games yourself or visit the website of Frits Luteijn at http://home.kpn.nl/dammen/. There is a lot of theory about openings at his site. You can try the Google translator to read the Dutch text.

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The opening of the game

Introduction

How to play the opening depends on what type of game you prefer to play. Some people like to play classical games and their opening play will be aimed at getting a good classical position. Other people like modern play and their openings will have the directive of getting attractive modern play. And of course players who like locking positions will play trying to get such positions. An example will make this more concrete.

Let’s assume white plays 1.34 – 29

If black wants a classical game he can choose 1…. 20 – 24 2.29 x 20 15 x 24 3.32 – 28 10 – 15.

He can also delay making classics and try something like 1… 19 – 23 2.40 – 34 14 – 19 3.45 – 40 10 – 14 4.32 – 28 23 x 32 5.37 x 28 5 – 10 6.42 – 37 17 – 22 7.28 x 17 12 x 21 8.37 – 32 20 – 24 9.29 x 20 15 x 24.

Black takes <24> and the game becomes classical. Later the game may become closed classical.

If black wants a modern game, he can choose 1… 17 – 22 2.40 – 34 11 – 17. If black wants a fork lock he can try 1… 20 – 25 2.40 – 34 14 – 20 3.45 – 40 10 – 14

The immediate 19 – 24 is here possible, but played rarely.

4.32 – 28 17 – 21 5.31 – 26 19 – 24 6.26 x 17 11 x 22 7.28 x 17 12 x 21

And from this position many interesting games have been played such as Georgiev – Sijbrands (1999), that was covered in part 2 of this course.

There are many ways to play an opening. Isidore Weiss once said that every opening is good, if continued correctly…

Index of openings

1.32 – 28 opening

1) 1… 19 – 23 Symmetrical variation 1.1) The main line 1.2) Roozenburg variation 1.3) Drost sacrifice 1.4) Wiermsa counter sacrifice 1.5) Springer counter attack 1.6) System with 7.40 – 35 1.7) Groninger variation 1.8) Chizhov-exchange 2) 1… 18 – 23 Chefneux opening 2.1) The Fox (2.33 – 29 23 x 32 3.37 x 28 20 – 25) 2.2) Modern variation (3… 17 – 22 x 22) 2.3) The Highlander (2.38 – 32) 3) 1… 17 – 22 2.28 x 17 11 x 22 Chogoliev opening 3.1) Korchov opening 3.2) The Chizhov attack 4) 1… 17 – 22 2.28 x 17 12 x 21 Schwarzman manoevering opening 4.1) The right wing variation (3.35 – 30) 4.2) The wasp (3.31 – 26 7 – 12 4.26 x 17 12 x 21) 4.3) Prosman-attack (4... 11 x 22) 4.4) Main line (3.37 – 32) 4.5) Surrounding variation (3.34 – 30) 5) 1... 18 – 22 The eagle 5.1) Mutual outpost variation (5.34 – 30 20 – 25) 5.2) The black rush (5.34 – 30 20 – 25) 5.3) Roozenburg variation (5.31 – 26 19 – 23) 5.4) Fork Lock variation (5.31 – 26 20 – 25) 6) The black panther 1... 16 – 21 6.1) Right wing lock variation (2.31 – 26 11 – 16) 6.2) Russian variation (3.38 – 32) 6.3) Dutch variation (3.37 – 32) 6.4) Andreiko variation (2... 18 – 22) 7) The hedgehog (1... 17 – 21) 7.1) Schwarzman variation (5.38 – 32) 8) The Russian bear (1... 20 – 25)

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9) The cow (1... 20 – 24) 1) The cow (2.34 – 30 14 – 20) 2) Semi classical variation (2... 18 – 23) 1.33 – 29 The diamond 1) Roozenburg opening (1... 19 – 23 2.35 – 30 20 – 25) 2) Keller opening (1... 17 – 22) 3) The hedgehog (1... 17 – 21) 4) Krajenbrink attack (1... 16 – 21) 5) Classical reply (1... 20 – 24) 6) The buffalo (1... 18 – 22 2.31 – 26 20 – 24) 1.33 – 28 Sijbrands opening 1) Old Dutch (1... 18 – 23) 2) Modern play (1... 18 – 22) 3) The seagull (1... 17 – 21) 1.34 – 29 Fork lock opening 1) Chizhov opening (1... 19 – 23 ... 5.29 – 24) 2) Fork lock variation 1 (5.31 – 26) 3) Fork lock variation 2 (1... 20 – 25) 4) The peacock (1... 17 – 22) 1.34 – 30 French opening 1. The cheetah (1... 20 – 25 2.30 – 24) 2. Ottink variation (1... 17 – 22) 1.31 – 27 Polish opening 1) Semi-classical opening (1... 19 – 23 2.33 – 28 17 – 21) 2) Left wing opening (1 ... 17 – 21 2.27 – 31) 3) The big leap (1... 17 – 22 2.36 – 31 22 – 28) 1.31 – 26 The edge opening 1. The edge opening (1... 19 – 23) 2. The rejected edge opening (1... 17 – 21 2.26 x 17 11 x 22) 1.35 – 30 The wild horse 1) The wild horse (1.35 – 30 20 – 25)

An overview of popular openings

The most frequently played move to open the game is 1.32 – 28 which gives white the opportunity to develop his left wing immediately.

The 1.32 – 28 opening

Symmetrical variation

For the same reason black’s most frequently played answer is

1… 19 – 23 2.28 x 19 14 x 23

White’s most simple, but sound strategy is to change

3.33 – 28 23 x 32 4.37 x 28 and both players can develop their positions easily, for example:

4… 10 – 14 5.39 – 33 5 – 10 6.44 – 39 14 – 19 7.41 – 37

Now black has to make up his mind what plan to follow. If he wanted a classical game he could have played 6… 20 – 24 already.

If black wants a quiet maneuvering game 7… 10 – 14 8.46 – 41 17 – 22 9.28 x 17 12 x 21 can be chosen.

If black wants a modern play with a possible Roozenburg-attack he can play here or at the next move 7… 16 – 21, for example:

7… 16 – 21 8.31 – 26 18 – 22 9.37 – 32 11 – 16 10.46 – 41 9 – 14

11.41 – 37 3 – 9

White often goes to <23> in such situations playing 12.28 – 23 19 x 28 13.32 x 23.

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At 12.34 – 29 black plays 20 – 24 x 24 and later 21 – 27 x 27 getting a Roozenburg attack.

The main line

Usually 1.32 – 28 19 – 23 2.28 x 19 14 x 23 is answered by:

3.37 – 32 10 – 14

There are several ways to play for white depending on what his preferences are.

If white wants to play a sharp modern game he can play 4.35 – 30 or 4.41 – 37 5 – 10 5.35 – 30 hoping for a Roozenburg attack after 20 – 25 33 – 29. Usually white plays

4.41 – 37 5 – 10 5.46 – 41 14 – 19

Only then he decides how to continue. He can also play the popular 5.35 – 30 or 5.34 – 29 23 x 34 6.39 x 30.

Roozenburg – variation

The most popular move is 6.35 – 30 and after 20 – 25 both 7.33 – 29 and 7.40 – 35 are played. If white wants a Roozenburg attack he should choose 7.33 – 29, for example

7.33 – 29 10 – 14 8.40 – 35 17 – 22 9.31 – 27 22 x 31 10.36 x 27 11 – 17 11.45 – 40 6 – 11 12.30 – 24 19 x 30

13.35 x 24 14 – 20

This Roozenburg position has emerged in many games. White doesn’t have to fear 25 – 30 for after 34 x 14 23 x 45 14 – 10 white wins.

Things are different if white plays 9.45 – 40?! (instead of 9.31 – 27) 14 – 20 10.30 – 24? 19 x 30 11.35 x 24 for now 25 – 30! 12.34 x 14 23 x 45 13.14 – 10 9 – 14! 14.10 x 19 22 – 28 15.32 x 23 18 x 20 wins a piece for black.

From the last diagram white usually plays

14.38 – 33 17 – 21 15.42 – 38 21 – 26 16.41 – 36

Avoiding the king shot 16 – 21 26 – 31 13 – 19 17 x 46.

16… 11 – 17 17.48 – 42 1 – 6

If black plays 4 – 10 or 17 – 21 the normal 18.50 – 45 is fine, for example 17… 4 – 10 18.50 – 45 17 – 21 19.33 – 28 1 – 6 20.28 x 19 18 – 22 21.27 x 18 12 x 14 with a right wing attack for white. In the second part of A Course in draughts the game Sijbrands – Gantwarg (1973) from this opening was shown.

But in this case black plays 17… 1 – 6! white should play 18.40 – 35!

The reason is that 18.50 – 45 6 – 11 19.33 – 28 4 – 10 20.28 x 19 9 – 14 21.38 – 33 14 x 23 22.33 – 28 26 – 31 23.37 x 26 13 – 19 24.24 x 22 3 – 9 25.29 x 18 12 x 23 26.28 x 19 17 x 48 27.36 – 31 11 – 17 28.19 – 14

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10 x 19 29.47 – 42 48 x 37 30.31 x 42 7 – 12 31.42 – 38 9 – 13 is not so pleasant for white, he can only hope for a draw.

Playing 22.36 – 31 10 – 14! makes things only worse. 23.33 – 28? Is punished by 14 – 19 24.40 – 35 19 x 30 25.35 x 24 17 – 22! 26.28 x 6 23 – 28 27.32 x 23 7 – 11 28.6 x 17 12 x 41 etc. B+.

The famous Wiersma – Kuyken (1973) game showed that also after 23.43 – 38 14 – 19 24.40 – 35 19 x 30 25.35 x 24 17 – 21 26.33 – 28 12 – 17 27.28 x 19 18 – 23 28.29 x 9 20 x 40 29.45 x 34 3 x 23 black has a good game, since white’s left wing is locked (see game in appendix)

19.40 – 35! 6 – 11 20.33 – 28

If white played 50 – 45 (instead of 40 – 35) black would be able to play 26 – 31 now. But in this case (with 19.40 – 35! played) 20… 26 – 31 isn’t good. Black has to take the 4 – 10 temp giving white a counter-shot: 21.37 x 26 13 – 19 22.24 x 22 4 – 10 23.28 x 19 17 x 48 24.19 – 14 10 x 19 25.29 – 24 20 x 40 26.39 – 34 48 x 30 27.35 x 4 W+.

20… 4 – 10

21.28 x 19 9 – 14 22.36 – 31 14 x 23 White can play either 23.38 – 33 with a very sharp game or:

23.27 – 22 18 x 36 24.29 x 9 20 x 40 25.9 – 4

In Sijbrands – Gantwarg (1990) then followed 25.4 – 27 11 – 16 26.50 – 45 3 – 9 27.27 x 4 21 – 27 28.32 x 21 16 x 27 29.45 x 34 10 - 14 30.4 x 31 36 x 27 31.34 – 29 8 – 13 32.39 – 34 12 – 18 33.29 – 24 17 – 22 34.44 – 39 13 – 19 with a draw.

Of course there are many more variations, but these sharp lines will give you an idea of what can happen in this Roozenburg system. At the 8th move the Springer Contra Attack 8… 23 – 28 9.32 x 23 19 x 28 is also a popular continuation.

Drost-variation

From the diagram starting the Roozenburg-variation, black can choose to play against the Roozenburg-attack, playing the Drost gambit.

6.35 – 30 20 – 25 7.33 – 29 17 – 22

Black doesn’t play 10 – 14 but keeps his piece at <10> not going to <20> because this is better for playing the Drost-gambit.

8.40 – 35 11 – 17 9.31 – 27 22 x 31 10.36 x 27 6 – 11 11.45 – 40 17 – 21 12.38 – 33 21 – 26 13.43 – 38 11 – 17 14.30 – 24 19 x 30 15.35 x 24 17 – 21

16.41 – 37 12 – 17

The key position can be reached with all kinds of different move orders. Black doesn’t want to answer 17.33 – 28 by a counter-attack at the piece at <27>.

17.33 – 28 7 – 12 18.28 x 19 17 – 22

The orthodox defense for white goes 19.39 – 33 22 x 31 20.36 x 27 12 – 17 21.47 – 41 2 – 7 22.44 – 39 17 – 22 23.41 – 37 22 x 31 24.26 x 27 7 – 11. White can never play 33 – 28 because of 15 – 20 B+. This is the reason black didn’t go to <20>! Here or later white gives back the piece 19 – 14 10 x 30 29 – 23 18 x 29 33 x 35 =. If white plays this immediately black is better after 1 – 6! 39 – 33 13 – 18 for white has to take care for 26 – 31 all the time. If he plays 33 – 28 black goes 26 – 31 37 x 17 11 x 31 and the piece at <31> can’t be changed.

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The sharpest defense is called the Wiersma counter-sacrifice:

Wiersma counter sacrifice

19.40 – 35! 22 x 31 20.26 x 27 12 – 17 21.27 – 22! 18 x 27 22.29 – 23

If white keeps his piece at <19> usually it is good for black. The idea for white is to play 39 – 33 and change back 34 – 30 24 – 20 keeping a sound center attack.

22… 17 – 22 23.39 – 33 27 – 31

Threatening 22 – 28 21 – 27.

24.32 – 28 31 – 36 24… 13 – 18 25.23 x 12 8 x 17 (See Wiersma – Georgiev (1995) in the appendix) and 24… 9 – 14 25.28 x 17 21 x 12 26.23 – 18 12 x 23 27.19 x 28 are also played.

25.28 x 17 21 x 12 26.34 – 30 25 x 34 27.24 – 20 15 x 24 28.19 x 39

The position, white having a centre attack, black having his defensive zone intact, is about equal.

Springer Counter Attack

From the diagram with the Roozenburg attack black can also play

6.35 – 30 20 – 25 7.33 – 29 10 – 14 8.46 – 41 23 – 28 9.32 x 23 19 x 28

10.45 – 40? is too slow. Black gets an advantage by 10… 16 – 21! 11.31 – 26 17 – 22 12.26 x 17 12 x 21

10.31 – 27 17 – 21 11.37 – 31 21 x 32 12.38 x 27 18 – 22 13.27 x 18 13 x 22 14.39 – 33 28 x 39 15.44 x 33 4 – 10!

Black has to do something against the 33 – 28 30 x 10 threat. He doesn’t want to play 14 – 20 or 14 – 19 because he wants to play against white’s right wing. Playing 14 – 20 gives white the possibility to develop his right wing playing 42 – 38 45 – 40 50 – 45 (and possibly 49 – 44 – 39) and 29 – 24 x 23 x 29, while after 14 – 19 white can change to <24> later, developing piece 35. In the Traoré – Gantwarg (1980) game in the appendix black showed a nice surrounding strategy. The opening was slightly different, black not taking the counter attack until 9… 17 – 22 10.31 – 27 22 x 31 11.36 x 27 was played. Black can also play the Springer Counter Attack differently.

6.35 – 30 20 – 25 7.33 – 29 9 – 14 8.40 – 35 3 – 9 9.45 – 40 23 – 28

10.32 x 23 19 x 28

White can choose from 11.39 – 33 28 x 39 12.44 x 33, 11.38 – 33 and 11.30 – 24. 11.50 – 45? can be met by 16 – 21! 12.31 – 26 21 – 27 13.30 – 24 13.37 – 31? 28 – 33 & 17 – 21 B+1. 13.38 – 33 27 – 32 14.33 x 22 18 x 27 15.37 x 28 17 – 21 B+ 1. 13.38 – 32 27 x 38 14.43 x 23 13 – 19 gives black an advantage. 13… 28 – 33! 14.39 x 28 14 – 19 15.43 – 39 19 x 30 16.35 x 24 27 – 31 17.36 x 27 15 – 20 18.24 x 15 25 – 30 19.34 x 25 17 – 22 20.28 x 17 12 x 23 with a better position for black.

System with 7.40 – 35

If white plays (6.35 – 30 20 – 25) 7.40 – 35 a different kind of game evolves. The sharp line 8… 15 – 20 9.44 – 40 20 – 24 10.50 – 44 17 – 21 11.31 – 26 21 – 27 12.32 x 21 16 x 27 13.33 – 28 23 x 32 14.37 x 28 11 – 17 15.28 – 23 19 x 28 16.30 x 19 13 x 24 17.34 – 30 25 x 34 18.40 x 20 will give an exciting fight in which white has to play against

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black’s attacking position with outposts at <27 & 28>. 10… 10 – 14 is met by 11.34 – 29 23 x 34 12.40 x 20 25 x 34 13.39 x 30 14 x 34 and white can choose from 14.44 – 39 winning back te piece immediately but allowing 16 – 21 – 26, or if white doesn’t want to allow this, he can first play 14.31 – 27?! or 15.32 – 27(!) and then win the piece back. A more quiet approach is:

Groninger variation This line is named after the capital city of the Dutch province Groningen, with the same name. In the 1970’s and 80’s draughts was very popular and this line was explored by strong players from Groningen.

6.32 – 28 23 x 32 7.37 x 28

giving black the initiative. Now black can consider launching a Roozenburg attack:

7 … 16 – 21 8.31 – 26 18 – 22 9.42 – 37

Black has to take care not to fall victim to the kingshot after 9… 11 – 16? 10.33 – 29 22 x 31 11.36 x 27 21 x 32 12.29 – 24 ad lib. 13.34 x 5 W+. He should close the gap at <14> first.

9… 9 – 14 10.37 – 32 11 – 16 11.41 – 37 3 – 9 12.48 – 42 7 – 11

12... 6 – 11 is also played often, but 7 – 11 turns out to be best. White can launch the Springer Contra Attack again playing 28 – 23 x 23, but 20 – 24 gives black a good position. If white plays 13.34 – 29 20 – 24 14.29 x 20 15 x 24 15.40 – 34 21 – 27 16.32 x 21 16 x 27 black has got the desired Roozenburg attack.

The Chizhov-exchange Instead of 5.46 – 41 white frequently plays

5.34 – 29 23 x 34 6.39 x 30

Chizhov popularized this continuation and got many followers. If black wants a classical game he can opt for 6… 20 – 24 7.30 x 19 13 x 24. Most of the times black plays

6… 14 – 19 7.44 – 39 10 – 14 8.40 – 34

After 20 – 25 white attacks 30 – 24 19 x 30 35 x 24. The most frequently played move is 8… 18 – 23 but also 17 – 22 and 16 – 21 are popular continuations.

8… 18 – 23 9.45 – 40 12 – 18 10.46 – 41 7 – 12 11.32 – 28 23 x 32 12.37 x 28 1 – 7 13.50 – 45 17 – 22 14.28 x 17 11 x 22 15.30 – 25 16 – 21

16.31 – 26 21 – 27 17.41 – 37

17.34 – 30 can also be played like in Chizhov – Wesselink. We show the game in the appendix, because of the nice way in which Chizhov plays against edge piece <36> in the appendix.

If black plays the passive 13… 17 – 21 14.41 – 37 21 – 26 white can try to put pressure on the opponent by building the power block, see the Chizhov – Berçot (2002) game in the appendix.

This position has been played at least 40 times in registered games as the valuable draughts

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games database Turbo Dambase reveals. Most black players go to <36> playing

17… 27 – 31 18.36 x 27 22 x 31 with an exciting game. Black can also try to maintain his right wing attack, playing 17… 19 – 23.

The opening 1.32 – 28 19 – 23 is intensively covered in a book written by Baliakin and Gantwarg: 1.32 – 28 19 – 23 12 systems. The book – with English text - can be bought at the office of the Dutch draughts federation KNDB. bondsbureau@kndb.nl The second most popular answer to 1.32 – 28 is 18 – 23. Of course white can’t play 2.37 – 32 because of the Harlem shot 23 – 29 B+2. The best replies are 2.33 – 29 and 2.38 – 32.

The Fox

1.32 – 28 18 – 23 2.33 – 29 23 x 32 3.37 x 28

If white plays 2.34 – 29 23 x 32 3.37 x 28 black can play 12 – 18, but after 2.33 – 29 the move is prohibited! Black can go in several directions depending on his desired strategy. If black wants a modern game, playing against a right wing attack he can play the popular 20 – 25 entering the Fox. This opening is called after Dutch draughts player J.H. Vos. Since ‘vos’ means fox in Dutch, we call this opening The Fox.

3… 20 – 25 4.41 – 37 12 – 18

4… 17 – 21 can give an exciting game especially if white allows black to create a fork lock without piece at <15>: 5.39 – 33 15 – 20 1) 6.44 – 39 19 – 24 7.37 – 32 21 – 26 8.50 – 44 26 x 37 9.42 x 31 14 – 19 etc. wit exciting play, see Holstvoogd – Sijbrands in the appendix. 2) 6.37 – 32 19 – 24 7.46 – 41 21 – 26 8.41 – 37 14 – 19 9.44 – 39 16 – 21 10.50 – 44 10 – 14 11.31 – 27 11 – 16 and in this fascinating position 12.29 – 23! will result in an interesting fight. A fascinating variation is: 12… 7 – 11 Eliminating the 34 – 30 x 30 change by a kingshot. 13.34 – 29 5 – 10 14.40 – 34 12 – 17 15.27 – 22! 8 – 12 16.23 – 18! 12 x 23 17.29 x 18 and the outpost at <18> gives shape to an unorthodox game!

5.37 – 32

White can attack immediately 5.29 – 24 20 x 29 6.35 x 24. This Fox is played frequently by masters and grandmasters against weaker opponents to complicate the game and play against the right wing attack. Players like Baljakin, Schwarzman and Gantwarg love to play the Fox and have gained good results and played several beautiful games with it.

5… 16 – 21

The other important move is the ordinary 5… 7 – 12. White has to make a choice: 1) 6.29 – 24 19 x 30 7.35 x 24 with right wing attack. 2) 6.39 – 33 19 – 23 7.28 x 19 14 x 23 and form many variations we show: 8.44 – 39 10 – 14 9.50 – 44 14 – 19 10.46 – 41 5 – 10 11.42 – 37 15 – 20 12.32 – 28 23 x 32 13.37 x 28 19 – 23 14.28 x 19 13 x 24 15.35 – 30 24 x 35 16.29 – 23 18 x 29 17.33 x 15 with an interesting play with the edge piece at <15>. 3) 6.46 – 41 1 – 7 7.41 – 37 17 – 21 8.39 – 33 21 – 26 9.43 – 39! 11 – 17 9… 19 – 23 10.28 x 19 14 x 23 11.33 – 28 is not so attractive for black. 10.29 – 24! 19 x 30 11.35 x 24 with a good right wing attack, in Sijbrands – Gantwarg (1995) followed 11… 7 – 11 12.31 – 27 17 – 21 13.34 – 29 14 – 20 14.37 – 31 26 x 37 15.42 x 31 21 – 26 16.47 – 42 26 x 37 17.42 x 31 11 – 17 18.40 – 34 17 – 22 19.28 x 17 12 x 21 20.45 – 40 21 – 26 21.33 – 28 26 x 37 22.32 x 41 10 – 14 23.29 – 23 20 x 29 24.23 x 12 20 x 29 25.34 x 23 with a strong centre attack for white.

6.29 – 24 19 x 30 7.35 x 24 If white doesn’t want to go to <24> so early, he can play 6.39 – 33 21 – 26 7.44 – 39 26 x 37 8.42 x 31 19 – 23 9.28 x 19 14 x 23.

7… 11 – 16 7… 21 – 26 8.39 – 33 26 x 37 9.42 x 31 7 – 12 9… 14 – 19 can be met by 10.44 – 39 19 x 30 and instead of 11.28 – 23 18 x 29 12.33 x 35 with equality white can play 11.40 – 35 trying to keep his attack. 10.46 – 41

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After 10.44 – 39 17 – 21 11.46 – 41? is punished by 13 – 19 24 x 22 21 – 27 32 x 21 11 – 17 22 x 11 6 x 46 10… 17 – 21 11.41 – 37 21 – 26 12.47 – 42 with a sound attack for white.

8.46 – 41 7 – 12 9.41 – 37 1 – 7 10.39 – 33

In this position black has tried all kind of continuations. We show one variations in which white is trapped.

10… 21 – 26 11.44 – 39 11.43 – 39 can be played trying to get the position from Sijbrands – Gantwarg. 11… 7 – 11 12.50 – 44 17 – 21 13.31 – 27 14 – 20 14.34 – 29?! 12 – 17 15.37 – 31? 26 x 37 16.42 x 31 White should play 15.28 – 23 but 8 – 12 16.33 – 28 9 – 14 17.39 – 33 3 – 8 18.37 – 31 26 x 37 19.42 x 31 17 – 21 20.48 – 42 21 – 26 21.42 – 37 14 – 19 22.23 x 14 10 x 30 23.29 – 23 18 x 29 24.33 x 35 4 – 9! (threatening 16-21) 25.27 – 22 * still leads to a better position for black. 16… 18 – 23!! 17.28 x 19 21 – 26 and since 33 – 28 is punished by 26 x 37 32 x 41 25 – 30! B+ white is lost. After 1.32 – 28 18 – 23 2.33 – 29 23 x 32 3.37 x 28 black has more options of course. If he wants a classical game he can play 3… 20 – 24 4.29 x 20 15 x 24. If black wants a modern game he can play

Modern variation

3… 17 – 22 4.28 x 17 11 x 22 5.39 – 33 5.41 – 37 allows 16 – 21 6.31 – 26 20 – 24 7.26 x 28 24 x 22 with an easy game for black.

5… 13 – 18 6.44 – 39 19 – 23

If black wants a right wing attack he can try 6… 9 – 13 7.41 – 37 16 – 21 8.31 – 26 21 – 27.

7.35 – 30

The sharpest move. White can play 7.41 – 37 14 – 19 8.29 – 24 20 x 29 9.33 x 13 8 x 19 10.37 – 32 10 – 14 11.32 – 27 with a semi-fork. However black’s strong centre compensates more than enough for this, as the G. Jansen – Sijbrands game of 1988 proved. Sijbrands began to build his centre activating piece 2 with 2 – 8 – 13. See the section about strategy for this game.

7… 14 – 19

7… 20 – 25 is met by 8.30 – 24! 14 – 20 and to stop the plan 8 – 13 2 – 8 followed by an attack at <24> white plays 9.38 – 32! a move introduced by the author of this course. Many opponents (also pupils of mine) have become victim to the shot 8 – 13? 11.32 – 28! 23 x 32 12.34 – 30 25 x 23 13.41 – 37 20 x 38 14.37 x 28 W+1. If black plays 9 – 13 the outpost is safe and white can transfer the position to a right wing attack or a Roozenburg attack.

8.40 – 35 8 – 13 9.41 – 37

Black can now play 16 – 21, but most of the time he goes on with 9… 6 – 11 after which white can build the 46 / 41 / 37 tail in order to change to <28>. If black plays 10 – 14 white can consider to play 30 – 25 blocking black’s left wing.

The Highlander

1.32 – 28 18 – 23 2.38 – 32

is a more classical way to play for white. An important position is reached after

2… 12 – 18 3.31 – 27 7 – 12 4.43 – 38 20 – 24

The Molimard-variation gets shape after 4… 17 – 21 5.37 – 31 (or 5.49 – 43) 23 – 29 6.34 x 23 18 x 29 7.33 x 24 20 x 29. More information at Frits Luteijn’s website: http://home.kpn.nl/dammen/molimard/

5.37 – 31 14 – 20 6.49 – 43 10 – 14 6… 2 – 7 would give white the extra opportunity 27 – 22 x 22! After 6… 10 – 14

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7.27 – 22 18 x 27 8.31 x 22 would cost a piece because of 23 – 29 24 – 30 B+1.

7.41 – 37 1 – 7 8.46 – 41 5 – 10 9.34 – 29 23 x 34 10.40 x 29 20 – 25

11.29 x 20 15 x 24

The most interesting move in this position that has emerged on the board hundreds of times, is 12.27 – 22 18 x 27 13.3 x 22 launching a Highland attack. This opening is thus logically called the Highland variation or Highlander. With piece 50 at <49> this move wouldn’t be possible because of the 19 – 23 kingshot.

12.27 – 22 18 x 27 13.31 x 22 16 – 21 White can’t go 14.36 – 31? because of 24 – 29 33 x 24 19 x 30 35 x 24 13 – 19 24 x 13 9 x 36 B+1. He should go to <34> first and then play 36 – 31. Instead of 14.44 – 40 the more central 45 – 40 – 34 is also possible.

14.44 – 40

We show two important variations. 1) 14… 21 – 26 15.40 – 34 17 – 21 16.36 – 31 11 – 16 17.31 – 27 12 – 18 18.45 – 40 White can also choose 34 – 30 x 30. 18… 18 – 23 19.50 – 45 24 – 30 20.35 x 24 19 x 30 21.28 x 19 14 x 23

White’s play is severely restricted for a couple of moves. 22.40 – 35? is punished by a kingshot: 10 – 14 35 x 24 23 – 29 34 x 23 26 – 31 37 x 17 13 – 19 24 x 13 8 x 46 B+. 22.34 – 29 23 x 34 23.40 x 29 7 – 11 Prohibiting 33 – 28? by 26 – 31 13 – 18 B+ 24.41 – 36 10 – 14 25.36 – 31 with an interesting fight. Black wants to exploit the arc lock while white hopes his strong centre will give him the odds. See the Baliakin – Mogiljanski game (1987) in the appendix. 2) 14… 10 – 15 15.40 – 34 14 – 20 16.44 – 40 16 – 21 17.36 – 31 17 – 21 18.41 – 36 18.31 – 27? isn’t good because of the 12 – 17 27 x 16 26 – 31 37 x 26 19 – 23 28 x 30 17 x 46 kingshot. Now 18… 7 – 11 or 18… 12 – 18 is played with a complicated game that should be studied seriously. The nice F. de Koning – Thijssen game (2010) is shown in the appendix. GMI Kees Thijssen is a specialist in this Highland opening.

Chogoliev-variation

1.32 – 28 17 – 22 2.28 x 17 11 x 22

This opening is a good choice for black players who want an active modern game. Fascinating games emerge after the Korchow-variation: 3.37 – 32 12 – 17?! 4.31 – 26 6 – 11 4.36 – 31 8 – 12 5.32 – 27 White is threatening to play 41 – 36 with a strong fork lock, so black plays the logical 5… 16 – 21 6.27 x 16 22 – 28 7.33 x 22 18 x 36 Thousands of draughts lovers have played this opening. The edge pieces make this type of game very attractive. Frits Luteijn’s website gives much more information about this so-called Korchow-opening: http://home.kpn.nl/dammen/Korchow/index.htm

3.37 – 32 6 – 11 4.41 – 37 12 – 17 5.46 – 41

The alternative 5.34 – 30 7 – 12 6.30 – 25 aims at playing against an right wing or centre attack, for example: 6… 1 – 6 7.46 – 41 19 – 23 8.35 – 30 13 – 19 9.40 – 35 9 – 13 10.45 – 40 4 – 9 11.31 – 26 2 – 7 12.50 – 45 and black attacks playing 22 – 27, 22 – 28 or 23 – 28.

The Chizhov-attack

5… 8 – 12

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Both 7 – 12 and 1 – 6 are played also. 1) 5… 7 – 12 6.34 – 29 Another option is 6.31 – 27 22 x 31 7.36 x 27 and 6.32 – 28 19 – 23 7.28 x 19 14 x 23 8.34 – 29 23 x 34 9.40 x 29 10 – 14 10.35 – 30 20 – 25 11.30 – 24. 6… 19 – 23 7.40 – 34 7.31 – 27 22 x 31 8.36 x 27 23 x 34 9.39 x 30 for maneuvering play 9… 20 – 25 is met by 10.44 – 39 25 x 34 11.40 x 29! 7… 14 – 19 8.45 – 40 10 – 14 9.32 – 28 23 x 32 10.37 x 28 5 – 10 and black takes back the centre changing 19 – 23 x 23 at the next move or prepares this exchange with the sharp 11… 16 – 21. 2) 5… 1 – 6 6.34 – 29 19 – 23 7.40 – 34 14 – 19 8.45 – 40 8 – 12 9.32 – 28 23 x 32 10.37 x 28 20 – 24 11.29 x 20 15 x 24 12.41 – 37 16 – 21 13.31 – 26 11 – 16 with a Roozenburg game. White’s most popular replies are 6.35 – 30 (20 – 25 7.32 – 28), 6.34 – 29 and our personal favorite:

6.32 – 28 16 – 21 7.31 – 26 21 – 27 8.35 – 30 2 – 8 9.30 – 25

Black can go to <36> changing 27 – 31 x 31 but can also maintain his attack in spite of the weakness at <2>. This is the way Chizhov likes to play. This opening generated many interesting games in which white has to play against black’s right wing attack.

9… 19 – 23 10.28 x 19 14 x 23 11.25 x 14 10 x 19

Black can also play even more sharp: 10… 1 – 6 11.37 – 31 and only then change 19 – 23. Chizhov played this way several times.

12.34 – 30

This is the most radical move. More safe play gives 12.34 – 29 23 x 34 13.40 x 29 or 13.39 x 30.

12… 5 – 10 13.40 – 34 15 – 20 14.30 – 25 10 – 15 15.25 x 14 9 x 20

With a fascinating fight in which white plays against the right wing attack.

Schwarzman maneuvering-opening

Baliakin was confronted with this opening in the match from 1995 against Schwarzman. In his book Schwarzmanie (Schwarzmania) he proposed to name this continuation the Schwarzman-opening.

1.32 – 28 17 – 22 2.28 x 17 12 x 21

The exchange is played by many strong players who like to maneuver first before the game gets concrete. White can respond in many ways, the sharpest of which is

Right wing continuation

3.35 – 30 20 – 25 4.40 – 35 4.33 – 29 is interesting too.

4… 15 – 20 5.45 – 40 20 – 24 6.33 – 29 23 x 34 7.39 x 28

If black doesn’t want to play against the attack via 44 – 39 followed by 30 – 24 x 24 he can answer like Schwarzman played against Prosman (2004):

7… 11 – 17! 8.44 – 39 18 – 22 9.38 – 33 Prosman played 9.49 – 44 22 x 33 10.39 x 28 and never managed to get a sound attack.

9… 14 – 20 10.50 – 45

It’s not a wrong idea to allow being locked: 10.37 – 32 20 – 24 11.31 – 27 22 x 31 12.36 x 27

10… 20 – 24

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In M. Kroesbergen – J. Lemmen 2006 white played a double pseudo sacrifice after which black went terribly wrong: 11.28 – 23?! 19 x 28 12.30 x 19 13 x 24 13.31 – 27 21 x 32 14.42 – 38 6 – 11 15.38 x 18 8 – 13?? Black should play 15… 8 – 12 16.33 x 22 12 x 23 17.47 – 42 17 x 28 18.34 – 30 25 x 34 19.40 x 18 = 16.33 x 22 17 x 28 17.49 – 44! 13 x 22 18.34 – 29 24 x 33 19.37 – 32 28 x 37 20.39 x 6 and with a piece more white won the game.

The wasp A more quiet approach for white is:

3.31 – 26 7 – 12 4.28 x 17 12 x 21 5.37 – 31

With the intention to take back <27>. If white plays 5.36 – 31 the smart 19 – 23 stops the plan to take <27>.

5… 2 – 7 6.31 – 27 21 x 32 7.38 x 27 11 – 17 8.43 – 38 19 – 23 9.49 – 43

17 – 21! At this moment white has no neutral move to make the change. He should play either 36 – 31 or 34 – 30.

10.36 – 31 21 x 32 11.38 x 27 23 – 28 12.33 x 22 16 – 21 13.27 x 16 18 x 36

And piece <36> guarantees an interesting game. Chizhov won a strong game against Schwarzman during the world championship 2003 (see appendix).

The Prosman-attack Black can also go to <22> after 3.31 – 26, like GMI Erno Prosman likes to play.

3.31 – 26 7 – 12 4.26 x 17 11 x 22 5.37 – 31 16 – 21 6.31 – 26 22 – 27

7.26 x 17 12 x 21

Many games have been played in recent years with this system.

The main line

3.37 – 32 7 – 12 4.34 – 29 1 – 7

Black can play 4… 11 – 17 5.40 – 34 6 – 11 6.31 – 26 1 – 6 7.45 – 40 19 – 23 8.42 – 37 14 – 19 9.48 – 42 10 – 14 10.50 – 45 5 – 10 11.37 – 31 2 – 7 12.41 – 37 20 – 25 13.46 – 41 15 – 20 14.35 – 30

In this well-known theoretical position black can’t delay going to <27> any longer. 14… 10 – 15 isn’t possible because of 30 – 24 32 – 27 W+. 14… 21 – 27 15.31 x 22 17 x 28 16.33 x 22 18 x 27 17.32 x 21 16 x 27 18.29 x 18 13 x 22 It’s also possible to take 18… 12 x 23 19.37 – 32 20 – 24 20.27 x 16 24 x 35 and black holds the centre. 19.37 – 32 11 – 17 20.32 x 21 20 – 24 21.41 – 37 24 x 35 etc.

5.40 – 34 19 – 23 6.45 – 40

White can choose to play a classical game: 6.41 – 37 14 – 19 7.33 – 28 and later black will probably change 20 – 24 x 24, for example: 21 – 26 8.39 – 33 11 – 17 9.44 – 39 20 – 24 10.29 x 20 15 x 24.

6… 14 – 19 7.42 – 37

Not allowing the chain lock with 19 – 24.

7… 10 – 14 8.50 – 45 5 – 10

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9.31 – 26

9.47 – 42 11 – 17 10.31 – 26 7 – 11 11.37 – 31 2 – 7 12.46 – 41 20 – 25 13.35 – 30 leads to a position we’ve seen before… 9.47 – 42 21 – 26 10.32 – 28 23 x 32 11.37 x 28 26 x 37 12.41 x 32 19 – 23 13.28 x 19 14 x 23 can get interesting after 14.35 – 30 20 – 25 15.30 – 24.

9… 21 – 27 10.32 x 21 16 x 27

9… 20 – 25 10.26 x 17 11 x 22 gives white an easy right wing attack after 11.32 – 28 23 x 32 12.37 x 17 12 x 21 13.29 – 24 19 x 30 14.35 x 24.

11.48 – 42 20 – 25 12.37 – 31 12 – 17 13.31 x 22 17 x 28 14.33 x 22 18 x 27

15.29 x 18 13 x 22

Black has a right wing attack, but it is not so strong since white can change piece <27> easily.

Surrounding variation A recent development in this opening is

3.34 – 30 7 – 12 4.30 – 25 White wants to play against the black centre. He could be playing against a right wing attack later. A variation that is frequently played

4… 11 – 17 5.31 – 26 6 – 11 6.40 – 34 1 – 6 7.45 – 40 19 – 23

8.35 – 30 14 – 19 8… 13 – 19 9.40 – 35 9 – 13 10.44 – 40 4 – 9 11.50 – 45 2 – 7 12.37 – 31 18 – 22 13.31 – 27 22 x 31 14.26 x 37 is also played after which black continues 14… 17 – 22 like the Schwarzman – Chizhov game (1998) in the appendix or 14… 12 – 18 15.37 – 31 7 – 12 16.31 – 26 21 – 27 17.41 – 37 17 – 21 18.26 x

17 11 x 22 19.37 – 31 with white playing against the right wing attack.

9.25 x 14 9 x 20 10.30 – 25 4 – 9 11.25 x 14 9 x 20 12.37 – 31 10 – 14 13.41 – 37 5 – 10 14.46 – 41 2 – 7 15.38 – 32 21 – 27 16.32 x 21 16 x 27 17.31 x 22 18 x 27 18.34 – 30 20 – 24

19.30 – 25

Black has a right wing attack but a weak left wing.

The eagle

1.32 – 28 18 – 22 2.37 – 32 12 – 18 3.41 – 37

White can switch to another modern opening by playing 34 – 29 here or at the next move.

7 – 12 4.46 – 41 1 – 7

White can choose from 3 popular moves:

Mutual outposts variation

1) 5.34 – 29 19 – 23 6.28 x 19 14 x 34 7.40 x 29

7.39 x 30 leads to maneuvering before the game gets more concrete.

7… 10 – 14 8.35 – 30 20 – 25 9.30 – 24 14 – 20

Andreiko – Sijbrands (1969) was 9… 5 – 10 10.24 – 20? 15 x 24 11.29 x 20 10 – 15 12.45 – 40 15 x 24 13.33 – 28 22 x 33 14.38 x 20 16 – 21! 15.31 – 26 11 – 16 16.36 – 31 7 – 11 17.20 – 15 White couldn’t play 17.31 – 27 because of 4 – 10! 18.20 – 15 18 – 23! 19.15 x 4 13 – 18 20.4 x 22 17 x 28 21.26 x 17 11 x 31 22.37 x 26 28 x 46 B+. 17… 18 – 22 18.41 – 36 22 – 28 19.32 x 23 21 – 27 20.31 x 22 17 x 19 with a good game for black, who nevertheless lost the game.

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10.32 – 28

White can also try 10.44 – 40 5 – 10 11.50 – 44 9 – 14 12.31 – 27 22 x 31 13.36 x 27 17 – 22 13… 3 – 9 14.29 – 23! 18 x 29 15.27 – 22 17 x 28 16.32 x 34 20 x 29 17.34 x 23 gives white a solid centre attack. 14.37 – 31 3 – 9 15.42 – 37 14 – 19 16.41 – 36 19 x 30 17.29 – 23 18 x 29 18.33 x 35 22 – 28 19.32 x 23 25 – 30 20.35 x 24 20 x 18 with an equal position.

10… 16 – 21 11.31 – 26 11 – 16 12.37 – 32 21 – 27 13.32 x 21 16 x 27

White has to watch some shots. 1) 41 – 37? 27 – 32! 38 x 27 22 x 31 36 x 27 17 – 22 28 x 17 12 x 41 47 x 36 18 – 23 29 x 18 20 x 47 B+. 2) 42 – 37? 18 – 23! 28 x 19 27 – 32 38 x 18 12 x 34 39 x 30 20 x 38 43 x 32 13 x 35 B+1. 3) 38 – 32? 27 x 38 43 x 32 17 – 21! 26 x 17 12 x 21 28 x 26 18 – 23 29 x 18 20 x 27 B+1.

14.45 – 40

44.45 – 40 isn’t wrong for after 18 – 23 white takes 29 x 18 12 x 32 33 – 28! 20 x 29 28 x 37 8 – 12 37 – 32 winning back the piece with a good game for white.

14… 5 – 10 15.50 – 45

After 15.39 – 34?! 9 – 14?! white can play the surprising move 16.40 – 35! after which 14 – 19 is met by the kingshot 17.38 – 32! 19 x 39 18.43 x 34 27 x 38 19.26 – 21 17 x 26 20.28 x 17 12 x 21 21.29 – 24 20 x 40 22.50 – 45 42 x 33 23.45 x 1 and white can hide his king behind his own pieces: 10 – 14 35 – 30 25 x 34 1x45 followed by 45 – 50. After 15… 9 – 14 16.40 – 35 3 – 9 17.44 – 40 14 – 19? Is even worse, white can take a kingshot with both 18.38 – 32 and 18.36 – 31! W+, while 17… 18 – 23? 18.28 x 19 14 x 23 19.29 x 18 12 x 23 is punished by 34 – 30! 25

x 45 33 – 29 23 x 34 41 – 37 20 x 29 38 – 33 29 x 38 43 x 5. Therefore black has to play 13 – 19 x 19 at the 16th or 17th move. After 15.39 – 34 10 – 14 16.40 – 35 14 – 19 17.38 – 32 etc. the king is caught by 23 … 21 – 27 24.41 – 37 8 – 12 25.1 x 31 13 – 18 26.31 x 13 9 x 18 =.

15… 9 – 14 16.38 – 32 27 x 38 17.43 x 32

Now <9> is opened white can play this move. Another possibility is 16.42 – 37 27 – 32 17.38 x 27 22 x 42 18.47 x 38 3 – 9 19.41 – 37 18 – 23 20.28 x 19 14 x 34 21.39 x 30! Preventing the problems that arise after 21.40 x 29? 10 – 14 22.44 – 40 14 – 19 23.40 – 35 19 x 30 24.35 x 24 9 – 14 25.45 – 40 4 – 10 26.49 – 44 12 – 18! (threatening 17 – 21 8 – 12 14 x 45 B+) 27.39 – 34 7 – 12 28.43 – 39 14 – 19 and after changing back white’s right wing is ugly. 21… 25 x 34 22.40 x 29 10 – 14 23.44 – 40 White’s outpost is completely safe now, 14 – 19 is punished by 33 – 28 19 x 30 28 – 22 17 x 28 38 – 33 28 x 39 43 x 5 W+.

17… 4 – 9?!

17… 14 – 19 18.40 – 35 19 x 30 19.35 x 24 17 – 21 20.26 x 17 22 x 11 21.42 – 38 10 – 14 22.44 – 40 18 – 22 23.28 x 17 11 x 22 followed by an attack at <24> has also been tried, see Gantwarg – Wiersma in the appendix. 4 – 9 is a move introduced by former world champion late Jannes van der Wal. After the forced reply of white black takes a deep kingshot, getting a king for three pieces.

18.42 – 38

18… 22 – 27! 19.32 x 21 25 – 30 20.24 x 35 18 – 23 21.29 x 18 12 x 34 22.21 x 1 20 – 25 23.40 x 29 13 – 18 24. 1 x 23 25 – 30 25.35 x 24 15 – 20

26.24 x 13 8 x 50

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Black can get his king behind his pieces and has the odds. See L. Thijssen – B. Terwel (1996) in the appendix.

The black rush

2) 5.34 – 30 20 – 25 6.30 – 24 19 x 30 7.35 x 24 14 – 20 8.33 – 29

White can also play 8.39 – 34 20 x 29 9.34 x 23 18 x 29 10.33 x 24 22 x 33 11.38 x 29 with a right wing attack.

8… 22 x 33 9.39 x 28

9… 18 – 22

9.. 17 – 21 is another frequently played variation. After 10.29 – 23 20 x 29 (black can take otherwise too) 11.23 x 34 21 – 26 white controls the centre but also a weak piece at <41>. See the nice Gantwarg – Wirny (1983) game in the appendix.

10.38 – 33 10 – 14

Black can play the 13 – 18 9 – 13 22 – 27 scheme as an alternative.

11.42 – 38

11.43 – 39 can also be played, but allows 22 – 27 12.31 x 22 13 – 19 13.24 x 13 9 x 38 14.48 – 42 (20 – 24 15.29 x 9 38 x 28 16.28 – 22 4 x

13 17.39 – 34 17 x 28 18.34 x 32 with an equal position). 11.44 – 39? would give up a defender of piece 24, while black is aiming to attack the outpost several times.

11… 5 – 10 After 11… 16 – 21 12.31 – 26 11 – 16 13.44 – 39! Is possible, with the idea of 14 – 19 14.40 – 35 19 x 30 15.35 x 24 7 – 11 16.39 – 34! 9 – 14 17.43 – 39 and 14 – 19 is met by 28 – 23! 19 x 28* 32 x 23 +/- like in Sijbrands – J. de Jonge (blindfoldgame 1981).

12.47 – 42 14 – 19 13.40 – 35 19 x 30 14.35 x 24 10 – 14 15.44 – 40 14 – 19 16.40 – 35 19 x 30 17.35 x 24 9 – 14

18.45 – 40 3 – 9

The best way to defend piece 24 against the black rush is to keep piece 50 at its spot. After 19.50 – 45? 14 – 19 20.40 – 35 19 x 30 21.35 x 24 9 – 14 22.45 – 40 14 – 19 23.40 – 35 19 x 30 24.35 x 24 4 – 9 25.49 – 44 9 – 14 26.44 – 40 14 – 19 white can’t play 32 – 27? 19 x 30 27 x 9 8 – 13 9 x 18 12 x 45, so he must allow 27.40 – 35 19 x 30 28.35 x 24 22 – 27 29.31 x 22 13 – 18 30.22 x 13 8 x 30 and white’s right wing isn’t defended well.

19.49 – 44 14 – 19 20.40 – 35 19 x 30 21.35 x 24 9 – 14 22.43 – 39 4 – 9 23.44 – 40 14 – 19 24.40 – 35 19 x 30

25.35 x 24 9 – 14 26.48 – 43!

Now 14 – 19 can be met by 32 – 27 19 x 30 27 x 9 8 – 13 9 x 18 12 x 34 37 – 32 stopping the rush attack at white’s right wing. Changing 26… 22 – 27 27.31 x 22 13 – 18 28.22 x 13 8 x 30 gives white control over the centre.

3) 5.31 – 26 We have to consider two completely different lines.

Roozenburg-variation

3.1) 5… 19 – 23 6.28 x 19 14 x 23 7.32 – 28 23 x 32 8.37 x 28

8.33 – 28 22 x 33 9.39 x 19 13 x 24 has no point for white, since black builds the cannon playing 10 – 14 9 – 13 5 – 10 14 – 19 10 – 14 (4 – 9). After 5.34 – 29 23 x 34 6.40 x 29 black simply takes a right wing attack with 22 – 27 x 27.

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8 … 16 – 21 9.41 – 37 Another plan is trying to block the Roozenburg attack playing 9.38 – 32 11 – 16 10.41 – 37 21 – 27 11.32 x 21 16 x 27 12.37 – 31 10 – 14 12… 13 – 19? Is punished by 13.26 – 21 W+. 13.43 – 38 5 – 10 14.49 – 43 trying to attack <27>.

9… 21 – 27 6.37 – 31 20 – 24 Black now has a sound Roozenburg attack. Usually white is going to attack <27> immediately playing 47 – 41 – 37 – 32.

Fork-lock-variation

3.2) 5… 20 – 25 6.37 – 31 14 – 20 7.41 – 37 10 – 14 8.47 – 41 5 – 10 9.32 – 27 19 – 23 10.28 x 19 14 x 23 11.34 – 30 25 x 34 12.40 x 29 23 x 34 13.39 x 30 20 – 25 14.44 – 39 25 x 34

15.39 x 30 10 – 14

From this interesting fork-lock position many games have been played.

The black panther

1.32 – 28 16 – 21

1… 16 – 21 is by far the sharpest reply to 1.32 – 28, inviting white to lock black’s right wing playing 2.31 – 26. Sometimes black even keeps the lock on the board deliberately to complicate the game:

Right wing lock variation

1) 2… 11 – 16 3.37 – 32 7 – 11 4.36 – 31! 4.41 – 37 is met by 19 – 23 5.28 x 19 14 x 23 and white can’t keep the lock. Black wants to play 21 – 27 x 27 at the next move with a sound right wing attack. 4… 19 – 23 5.28 x 19 14 x 23 6.33 – 28! 6.31 – 27? 23 – 28 7.32 x 23 21 x 32 8.38 x 27 18 x 38 9.43 x 32 favors black. 6 ... 9 – 14

Black can also choose 13 – 19 (Dibman-variation) or the Clerc – variation 21 – 27 7.31 x 22 18 x 27 8.28 x 19 13 x 24 9.32 x 21 16 x 27 7.28 x 19 14 x 23 8.31 – 27 with a right wing lock for black.

Russian variation 2) 2 … 11 – 16 3.38 – 32 7 – 11 4.37 – 31 19 – 23 5.28 x 19 14 x 23 6.31 – 27 23 – 28 7.32 x 23 18 x 38 8.43 x 32 with again a right wing lock. Black can also play other kinds of systems like 3.38 – 32 18 – 22 4.43 – 38: 1) 4… 7 – 11 5.49 – 43 1 – 7 6.37 – 31 21 – 27 7.32 x 21 16 x 27 8.42 – 37 11 – 16 9.37 – 32 16 – 21 10.41 – 37 20 – 24 and black plays the fascinating Partie Bonnard in the so-called Valkenburg-variation.. Many games continue 11.47 – 42 13 – 18 12.28 – 23 18 x 29 13.34 x 23 18 x 28 14.32 x 23 7 – 11 15.46 – 41 14 – 19 16.23 x 14 10 x 19 with an open Bonnard. 2) 4… 13 – 18 5.49 – 43 9 – 13 6.37 – 31 21 – 27 7.32 x 21 16 x 27 8.42 – 37 19 – 23 9.28 x 19 14 x 23 with a right wing attack for black. The opening 1.32 – 28 16 – 21 is extensively covered in a book by L.J. Koops.

Dutch variation

2.31 – 26 18 – 22 3.37 – 32 11 – 16 4.41 – 37 7 – 11 5.34 – 29 1 – 7

6.46 – 41

White can also choose to play against a right wing attack with 6.40 – 34 13 – 18 7.45 – 40 19 – 23 8.28 x 19 14 x 23 9.46 – 41 21 – 27 10.32 x 21 16 x 27 11.29 – 24 20 x 29 12.33 x 24. A nice example is the Gerritsen – Domchev (2010) game in the appendix.

Black can now try to play a Roozenburg attack: 6… 20 – 24 7.29 x 20 15 x 24 8.40 – 34 13 – 18 9.37 – 31 21 – 27 10.32 x 21 16 x 27 Because this variation isn’t without danger many players choose 6… 20 – 25. White can now move either 7.29 – 23 or 7.40 – 34.

Andreiko-variation

6… 20 – 25 7.40 – 34

7.29 – 23 21 – 27 8.32 x 21 16 x 27 9.35 – 30! 25 x 34 10.39 x 30 is also interesting.

80

10… 15 – 20 is punished by the kingshot 11.36 – 31! 27 x 36 12.23 – 18 12 x 32 13.38 x 18 13 x 22 14.37 – 31 36 x 27 15.30 – 24 20 x 38 16.43 x 1 +. The main line 10… 11 – 16 11.44 – 39 7 – 11 12.30 – 24! 19 x 30 13.36 – 31 27 x 36 14.23 – 19 14 x 32 15.38 x 7 8 – 12 16.7 x 18 13 x 22 17.40 – 35 favors white. The calm 10… 13 – 18 is the best continuation for black leading to a centre attack after 11.37 – 31 18 x 29 12.33 x 13 8 x 19 13.41 – 37 22 x 33 14.31 x 22 17 x 28 15.38 x 29.

7… 14 – 20 8.45 – 40 10 – 14 9.50 – 45 4 – 10

9… 4 – 10 is the characteristic move of the Andreiko-variation. 9… 5 – 10 allows the strong centre attack 28 – 23 x 23. 4 – 10 gives black a better construction to play against this attack. When confronted with this position in the Sijbrands – Andreiko match of 1973 Sijbrands considered 10.29 – 23 21 – 27 11.32 x 21 16 x 27 to be too dangerous and simplified the game playing 10.32 – 27 21 x 23 11.29 x 27 although he later won the game by a shot. Later 10.29 – 23 was played increasingly, with the sharpest line being 10… 21 – 27 11.32 x 21 16 x 27 12.36 – 31?! 27 x 36 13.38 – 32 After this pseudo sacrifice white is threatening 23 – 18 34 – 30 40 x 27 so black will have to return the piece 25 – 30 14.34 x 25 leading to a very complicated game.

10.28 – 23 19 x 28 11.32 x 23 isn’t bad either, for example: 11… 13 – 18 12.35 – 30 9 – 13 13.40 – 35 21 – 27 14.30 – 24 27 – 31 15.36 x 27 22 x 31 with an exciting play.

The hedgehog

1.32 – 28 17 – 21

Playing 2.31 – 26 11 – 17 (or 12 – 17) can lead to the 1.32 – 28 16 – 21 opening, but black can also choose to play 2… 19 – 23 with maneuvering play. 2.37 – 32 21 – 26 3.32 – 27 26 x 37 4.41 x 32 delivers white a quick development of his left wing and 4 temps.

2.34 – 29

2.33 – 29 can be met by the sharp 20 – 25 or 2… 21 – 26 neglecting the simplifying 28 – 23 29 – 24 34 x 32 exchange.

2… 21 – 26

Dutch GMI Johan Krajenbrink likes to play 2… 11 – 17 3.40 – 34 18 – 22.

3.40 – 34 16 – 21

Fascinating play emerges after 3… 11 – 17 4.45 – 40 6 – 11 5.37 – 32 26 x 37 6.42 x 31 19 – 23 7.28 x 19 14 x 23 8.35 – 30 20 – 25 9.41 – 37 White can’t go to <24> yet, because of 13 – 19 B+1. 9… 16 – 21 10.47 – 41 21 – 26 and black tries to play against a right wing attack, for example 11.50 – 45 10 – 14 12.30 – 24 11 – 16 13.32 – 28 23 x 32 14.37 x 28 26 x 37 15.41 x 32 16 – 21 etc.

4.45 – 40 11 – 16 We look at two possible continuations for white: 5.37 – 32 26 x 37 6.42 x 31 21 – 26 7.47 – 42 26 x 37 8.42 x 31 8.32 – 27 26 x 37 9.41 x 32 19 – 23 10.28 x 19 14 x 23 11.35 – 30 has grown more popular recently. 8… 6 – 11 Black wants to answer 9.41 – 37 with 17 – 21! 10.31 – 26 21 – 27 11.32 x 21 18 – 23 12.29 x 18 12 x 41 White wins a lot of temps so in this variation black will strive for a classical game. Pieces 21 / 26 are somewhat passive. 9.50 – 45 1 – 6!

81

Black still answers 16 – 21 to 10.41 – 37 and the alternative 10.48 – 42 16 – 21 11.31 – 26 20 – 24 12.26 x 17 12 x 21 13.29 x 20 15 x 24 gives black a good classical game. White’s left wing is weakened, so it’s hardly possible to break open the classical structure of the game.

Schwarzman-variation

5.38 – 32 21 – 27

5… 20 – 24 6.29 x 20 15 x 24 7.31 – 27 18 – 23 8.43 – 38 10 – 15 9.49 – 43 14 – 20 10.27 – 22 24 – 29 11.33 x 24 20 x 29 leads to a mutual classical attack, with a complicated game. This is the Bezwerzjenko-variation.

6.31 x 22 18 x 38 7.43 x 32 6.32 x 21 26 x 17 7.42 – 38 19 – 23 8.28 x 19 14 x 23 9.35 – 30 can get very interesting too.

7… 16 – 21 8.36 – 31

8.42 – 38 can also be considered, because it is more flexible although it doesn’t stop 21 – 27 x 27. The classical reply 20 – 24 9.29 x 20 15 x 24 can be met by 10.32 – 37 followed by 37 – 31 x 32 developing the left wing nicely.

8… 6 – 11 9.42 – 38 11 – 16 10.49 – 43

Usually black tries to go to a fork-lock: 10… 20 – 25 11.47 – 42 15 – 20 12.50 – 45 White can launch a centre attack 12.29 – 24 20 x 29 13.34 x 23. 12… 10 – 15 13.31 – 27 19 – 24 14.37 – 31 Escaping from the fork-lock 14.34 – 30 25 x 23 15.28 x 30 12 – 18 gives black a more flexible position. White’s left wing looks offbeat with the undeveloped piece at <46>. 14… 26 x 37 15.42 x 31 and black has to decide whether he wants to eliminate 34 – 30 by playing 13 – 19?! or play more quietly with either 15… 5 – 10 or 15… 21 – 26.

The Russian bear

1.32 – 28 20 – 25 2.37 – 32

2.33 – 29 is met by 17 – 22 x 22, 17 – 22 x 21 16 – 21 or 18 – 22, all with an interesting game.

2… 15 – 20 3.41 – 37 10 – 15 4.46 – 41

There are several other options here. For example 4.34 – 30 25 x 34 5.39 x 30 20 – 25 6.30 – 24 (6… 44 – 39 25 x 34 7.39 x 30 15 – 20 8.44 – 39 20 – 24 gives black a good classical game) 6… 19 x 30 7.35 x 24 leads to a right wing attack. Another possibility is 4.34 – 29 17 – 22 5.28 x 17 11 x 22 6.46 – 41 5 – 10 7.40 – 34 7 – 11 (or 6 – 11) 8.45 – 40 11 – 17 9.50 – 45 6 – 11 which leads to the Vermin-variation. A theoretical line is 10.31 – 26 2 – 7 11.37 – 31 White can also play the fascinating 11.32 – 28! 19 – 23 12.28 x 19 14 x 23 13.29 – 24 20 x 29 14.33 x 24 surrounding the black centre, that is weakened by the absence of the base piece at <2>. 11… 19 – 23 12.32 – 27 14 – 19 13.29 – 24 20 x 29 14.33 x 24 19 x 30 15.35 x 24 23 – 28 16.38 – 33 with a sharp game.

4… 5 – 10

4… 17 – 21 5.31 – 26 5 – 10 is the so-called Memel-variation.

5.31 – 27

White can also go to the edge himself: 5.31 – 26 20 – 24 6.36 – 31 15 – 20 7.41 – 36 18 – 23 8.34 – 29 23 x 34 9.39 x 30 25 x 34 10.40 x 29 13 – 18 11.29 – 23 18 x 29 12.35 – 30 24 x35 13.33 x 15 is one of the lines that is gaining popularity recently.

5… 19 – 23 6.28 x 19 14 x 23

The idea to occupy <25> & <23> simultaneously was introduced by former world champion Andris Andreiko. Black’s centre is strong enough to allow this 23 / 25 bond.

7.33 – 28 9 – 14 8.28 x 19 14 x 23 9.39 – 33

After 9.38 – 33 10 – 14 10.33 – 28 black can’t play neither 14 – 19? nor 13 – 19? and thus

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has to change again with 10… 4 – 10 11.28 x 19 14 x 23 which indeed is played, but because in this variation the black position is weakened, more popular has become 9.38 – 33 13 – 19 10.33 – 28 17 – 22 11.28 x 17 11 x 31 12.36 x 27 10 – 14 and black keeps the initiative.

9… 10 – 14 10.44 – 39 13 – 19

11.49 – 44

This is a modern continuation. The most popular way to continue used to be 11.50 – 44

11… 17 – 21

11… 4 – 9? 12.27 – 21! gives white a kingshot to <4>.

12.36 – 31

White has all kind of alternatives here. World champion juniors 2011 Roel Boomstra introduced 12.33 – 28 21 – 26 13.39 – 33 8 – 13 14.35 – 30?! followed by 4 – 9 15.34 – 29 23 x 34 16.30 x 39. White holds the centre and can later launch a Highland-attack.

12… 21 – 26 13.41 – 36 8 – 13 14.33 – 28 4 – 9

14… 2 – 8 wouldn’t allow 15.39 – 33? because of the 16 – 21 18 – 22 23 – 29 kingshot. However black rather allows 39 – 33? as this is worse than 38 – 33 which gives a better distribution of pieces.

15.38 – 33

15.39 – 33 2 – 8 16.44 – 39 12 – 17 17.49 – 44 17 – 22 18.28 x 17 11 x 22 19.33 – 28 22 x 33 20.39 x 28 7 – 12 21.44 – 39 6 – 11 leads to a

position that has occurred many times already. 22.38 – 33? is now punished by 16 – 21 23.27 x 7 23 – 29! 24.33 x 24 19 x 30 25.35 x 24 20 x 29 26.34 x 23 18 x 29 27.7 x 18 13 x 35 B+1. The alternative 22.39 – 33 23 – 29! favors black, especially after 23.34 x 23 18 x 29 24.33 x 24 19 x 30! 25.35 x 24 20 x 29 for example 26.27 – 22 14 – 19 27.43 – 39 16 – 21! and 28.31 – 27 is met by 11 – 17 25 – 30 – 34 19 – 23 13 x 44 B+.

15… 12 – 17 16.42 – 38 17 – 22 17.28 x 17 11 x 22 18.47 – 42 7 – 12 19.33 – 28 22 x 3 3 20.39 x 28 2 – 8

21.44 – 39

21.43 – 39? 20 – 24 22.49 – 43 24 – 29! favors black. 21.44 – 39 can’t be met by 16 – 21? 23.27 x 16 6 – 11 24.16 x 7 23 – 29 25.34 x 23 18 x 29 26.7 x 18 13 x 44 because of 27.40 – 34 29 x 40 28.45 x 34 44 – 50 29.49 – 44 50 x 30 30.35 x 2 W+

22… 6 – 11 23.39 – 33 23 – 29 24.34 x 23

After 24.33 x 24 19 x 39 25.43 x 34 14 – 19 26.49 – 43 19 – 24 only 27.28 – 22 is left for white. 28.27 – 22 18 x 27 29.31 x 22 loses a piece by 24 – 29 & 25 – 30 B+1 and 28.43 – 39 loses to 16 – 21 27 x 7 24 – 30 35 x 24 20 x 29 34 x 23 18 x 29 7 x 18 13 x 35 B+1.

24… 18 x 29 25.33 x 24 19 x 30 26.35 x 24 20 x 29 with about equal play. This position is also possible with 49 at <47>, as we saw, but now white’s distribution of pieces is better.

11… 17 – 21

11… 8 – 13 would allow the 27 – 22 34 – 30 exchange although this isn’t attractive for white either, so play continues 12.33 – 28 2 – 8

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13.39 – 33 4 – 9 14.44 – 39 and black should choose between 17 – 21 and 17 – 22.

12.36 – 31 21 – 26 13.33 – 28 8 – 13 14.39 – 33 2 – 8 15.47 – 41

This move, an idea introduced by Harm Wiersma, looks strange at first sight, because it creates a dangling piece at <41>. The point is however that black now can’t play 12 – 17 due to 34 – 30 40 x 29 27 – 21 32 x 23, so he must play 20 – 24 or 23 – 29 with a complicated game, in which white’s control over the centre should compensate the weakness at <41>.

15… 23 – 29

15… 20 – 24 16.34 – 29 23 x 34 17.40 x 20 15 x 24 18.44 – 39 favors white.

16.34 x 23 18 x 29 17.33 x 24 20 x 29 18.44 – 39 14 – 20 19.50 – 44

with a complicated game.

The cow

1.32 – 28 20 – 24 2.34 – 30

This opening gives black two interesting possibilities:

1) 2… 14 – 20 3.30 – 25 10 – 14 4.37 – 32 18 – 23 5.42 – 37

Now 5… 17 – 21 can be met by 6.31 – 26 (which is not possible after the normal 5.41 – 37) 5… 12 – 18 is met by 6.39 – 34! Therefore black usually plays:

5… 4 – 10

6.47 – 42

White can play the Molimard-exchange to <22> immediately, like in Clerc – Chizhov Wch 2001 (see appendix).

6… 12 – 18 7.28 – 22 17 x 28 9.33 x 22 18 x 27 10.31 x 22 8 – 12 11.32 – 27 2 – 8 12.37 – 31 12 – 18 13.31 – 26 7 – 12 14.27 – 21 16 x 27

15.22 x 31

White wants to play against black’s left wing, surrounding the centre.

Semi-classical variation

2) 2… 18 – 23 3.30 – 25 23 x 32 4.37 x 28 13 – 18 5.41 – 37 17 – 21

This variation can be played if black wants to surround the white centre. It is similar to 1.31 – 27 19 – 23 2.33 – 28 17 – 21 3.28 x 19 14 x 23 4.38 – 33 (with reversed colors).

1.32 – 28 20 – 24 2.37 – 32 18 – 23 is often played, but no clear theoretical lines have appeared yet.

1.33 – 29 The diamond

Roozenburg-opening

1.33 – 29 19 – 23 2.25 – 30 20 – 25

2… 14 – 19 can be met by 3.30 – 24 3.30 – 25 or 3.40 – 35. After 3.30 – 25 the most active move is 3… 17 – 22 4.25 x 14 9 x 20. The alternative 3… 10 – 14 4.39 – 33 17 – 22 5.44 – 39 11 – 17 6.32 – 28 23 x 32 7.37 x 28 4 – 10 8.29 – 23! 18 x 29 9.34 x 23 gives the odds to white.

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3.40 – 35 10 – 14 4.30 – 25 20 – 24 5.29 x 20 15 x 24 6.34 – 30 5 – 10 7.45 – 40 17 – 21 8.39 – 34 and if black goes to <26> white will change 32 – 28 x 32 and build the power block to put pressure at <24>.

3.40 – 35 14 – 20

3… 14 – 19 4.30 – 24 19 x 30 5.35 x 24 9 – 14 5… 10 – 14 6.24 – 19 13 x 33 7.39 x 10 5 x 14 8.38 – 33 favors white. 6.45 – 40 14 – 20 7.50 – 45 3 – 9 8.38 – 33 10 – 14 9.33 – 28 5 – 10 10.28 x 19 14 x 23 11.43 – 38 17 – 22 12.31 – 27 22 x 31 13.36 x 27 leads to a Roozenburg attack.

4.44 – 40 10 – 14 5.38 – 33 14 – 19 6.30 – 24 19 x 30 7.35 x 24 17 – 22 8.42 – 38 11 – 17 9.32 – 28 23 x 32

10.37 x 28

White takes a right wing attack. After 9.50 – 44 6 – 11 10.47 – 42 5 – 10 black doesn’t have to fear the attack at <23>, because 11.33 – 28 23 x 32 12.38 x 18 9 – 14 13.38 – 33 14 x 23 14.33 – 28? gives black the elegant kingshot 14… 17 – 22!! 15.28 x 6 23 – 28 16.32 x 23 12 – 17 17.23 x 21 16 x 27 18.31 x 22 13 – 18 19.22 x 13 8 x 50 + as was performed in Tsinman – Kalmakov 2000 and Skliarow – De Voogd 2004.

10… 16 – 21 11.41 – 37

11.38 – 32? fails due to 21 – 27 12.32 x 21 17 x 37 13.41 x 32 6 – 11! 14.28 x 6 18 – 23 15.29 x 18 20 x 27 B+1.

11… 21 – 27 12.50 – 44 6 – 11

In this position with mutual outposts white holds the centre and can choose from:

1) 13.31 – 26 27 – 32 14.38 x 27 22 x 42 15.47 x 38 and black should try to surround white’s attack.

2) 12.47 – 41 1 – 6 13.37 – 32 11 – 16 14.32 x 21 17 x 37 15.41 x 32 9 – 14 16.28 x 17 12 x 21 17.33 – 28 7 – 12 and black plays against the right wing attack again.

3) 12.46 – 41 1 – 6 13.48 – 42 9 – 14 14.31 – 26 White has to take care: after 14.28 – 23? 5 – 10!! he has no good move left! 15.37 – 31 is punished by 27 – 32! 16.38 x 27 22 – 28 17.23 x 32 13 – 19 18.24 x 22 17 x 46 B+. Check yourself how to punish the other possible white moves. 14… 27 – 31 15.36 x 27 22 x 31 16.37 – 32 31 – 36 with an interesting game.

The Keller-opening

1.33 – 29 17 – 22 2.39 – 33 11 – 17 3.44 – 39 6 – 11 4.50 – 44 1 – 6 5.31 – 26 16 – 21 6.32 – 28 19 – 23

7.28 x 19 14 x 23 These moves lead to the fascinating Keller-opening. The amount of theory of this opening is huge. I wrote a series of articles on this opening in draughts magazine Hoofdlijn (consisting of 37 articles in total!). You can also find theory about this opening at the Luteijn website. Frits Luteijn has played many games in this system and is known to be a connoisseur on the Keller-opening (and many other openings).

The Hedgehog

1.33 – 29 17 – 21 This opening moves can lead to the same variations as after 1.32 – 28 17 – 21 2.33 – 29 or 2.34 – 29, but white can also try the modern system 2.39 – 33 21 – 26 3.44 – 39 11 – 17 4.50 – 44 6 – 11 5.34 – 30.

Krajenbrink-attack

1.33 – 29 16 – 21 2.31 – 26 11 – 16

These moves usually lead to a sharp game. We show what is called the Krajenbrink-attack:

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3.37 – 31

Another main line is 3.39 – 33 7 – 11 4.44 – 39 1 – 7 5.50 – 44 and black can play 5… 18 – 22, 5… 20 – 25 or 5… 19 – 23 all with a complex game.

3… 6 – 11 4.31 – 27 18 – 22 5.27 x 18 13 x 22 6.41 – 37 9 – 13

7.39 – 33

Sijbrands introduced the Springer Contra Attaque in this position, playing 7.29 – 23 19 x 28 8.32 x 23.

After 7.39 – 33 black can play either 7… 21 – 27 8.32 x 21 16 x 27 or 7… 13 – 18 8.44 – 39 19 – 23, see the Gantwarg – Sijbrands (1988) game in the appendix.

The classical reply

1.33 – 29 20 – 24 2.29 x 20 15 x 24

3.32 – 28 17 – 21 leads to a classical game. More interesting is 3.32 – 28 16 – 21 4.31 – 26 4.39 – 33 21 – 26 is also played. 4… 21 – 27 5.38 – 33 5.37 – 31 18 – 23 leads to a centre attack for black 5… 27 – 32 6.28 – 22 17 x 28 7.33 x 22 18 x 27 8.37 x 28 11 – 17 9.39 – 33 13 – 18 10.44 – 39 18 – 22 like Mathijssen – Dolfing (2002). 3.34 – 30 is also popular, for example 18 – 23 4.39 – 33 White can also choose 4.30 – 25 12 – 18 5.40 – 34 7 – 12 6.34 – 30 1 – 7 7.45 – 40 4… 12 – 18 5.32 – 28 23 x 32 6.37 x 28 18 – 23 7.42 – 37 23 x 32 8.37 x 28 13 – 18 etc.

1.33 – 29 18 – 23 2.29 x 18 12 x 23

2… 13 x 22 has been played many times by former world champion Chogoliev. White can try to get a fork-lock playing 3.31 – 26 12 – 18 4.36 – 31 7 – 12 5.32 – 27 1 – 7 6.38 – 33 9 – 13 7.42 – 38 19 – 23 8.41 – 36 as happened in Sijbrands – Chogoliev 1990.

3.34 – 30 7 – 12 4.30 – 25 13 – 18

Black has to correct his division of pieces and reinforce the right wing. White must choose either the scheme 5.39 – 33 6.44 – 39 7.40 – 34 or 5.40 – 34 6.34 – 30 7.45 – 40 and if white decides to play against a future black attack the games gets exciting.

The buffalo

1.33 – 29 18 – 22 2.31 – 26 20 – 24 3.29 x 20 15 x 24

Black can also choose 2… 19 – 24 3.39 – 33 22 – 27 4.32 x 21 16 x 27 5.37 – 32 11 – 16 6.32 x 21 16 x 27 7.41 – 37 17 – 22 8.44 – 39 8.34 – 30?? 27 – 31 B+1 8… 14 – 19 9.50 – 44 6 – 11 10.46 – 41 1 – 6 11.38 – 32 27 x 38 12.43 x 32 but 2… 20 – 24 x 24 is much more interesting!

4.34 – 30

Other moves aren’t serious. 4.37 – 31 allows 24 – 29 34 x 23 19 x 28 32 x 23 22 – 27 31 x 22 17 x 19 and 4.38 – 33 22 – 28! Is no problem for black either.

Black has two continuations, both leading to interesting types of play.

4… 13 – 18

4… 22 – 28 5.32 x 23 19 x 28 6.30 x 19 14 x 23 gives black a centre attack and a fascinating game may lie ahead.

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5.36 – 31 18 – 23 6.32 – 27 12 – 18 7.37 – 32 7 – 12 8.41 – 37 8 – 13

Usually white doesn’t occupy <36> yet, not finishing his fork-lock, so black gets an extra option playing 22 – 28 sometime, white trying to surround black’s centre attack.

1.33 – 28 Sijbrands-opening

1.33 – 28 is the favorite openings move of the famous Ton Sijbrands.

Old Dutch

1.33 – 28 18 – 23

The Old Dutch opening usually leads to a classical game and possibly a Highland attack. An example play would be something along these lines: 2.39 – 33 12 – 18 3.44 – 39 7 – 12 4.31 – 27 20 – 24 5.37 – 31 14 – 20 6.41 – 37 White can launch the Highland-attack already playing 27 – 22 x 22 and black could reply with the symmetrical exchange 24 – 29 x 29. 6… 10 – 14 7.34 – 29 23 x 34 8.40 x 29 20 – 25 9.29 x 20 15 x 24 10.27 – 22 18 x 27 11.31 x 22 and we arrive at positions to those that arose from the 1.32 – 28 18 – 23 lines.

Modern play

1.33 – 28 18 – 22

Usually this opening leads to a modern game: 2.38 – 33 12 – 18 3.42 – 38 7 – 12 4.47 – 42 1 – 7 5.34 – 29 20 – 25 6.39 – 34 19 – 23 7.28 x 19 14 x 23 8.32 – 28 23 x 32 9.37 x 28 etc.

The alternative 2.31 – 27 22 x 33 3.39 x 28 19 – 23 4.28 x 19 14 x 23 is not attractive for white, since his left wing is not developed well, while piece <27> is blocking this development.

2.38 – 33 12 – 18 3.34 – 29

Another possibility is 3.31 – 26. Black then has also several options. The exchange 19 – 23 4.28 x 19 14 x 23 again gives white choice between 32 – 28 x 28 and 34 – 29 x 29.

3.31 – 26 7 – 12 4.37 – 31 19 – 23 5.28 x 19 14 x 23 6.32 – 27 leads to the so-called Wiersma-opening, black can play either 6… 13 – 19 or the sharp 6… 23 – 28.

If black delays the 19 – 23 x 23 3exchange even more with 3.31 – 26 7 – 12 4.37 – 31 1 – 7 5.42 – 38 20 – 25 6.41 – 37 14 – 20 7.46 – 41 10 – 14 8.47 – 42 5 – 10 9.32 – 27 etc. we arrive at the same fork-lock position as from the 1.32 – 28 18 – 22 opening (line 3.2).

3… 7 – 12

3… 19 – 23 4.28 x 19 14 x 34 5.40 x 29 7 – 12 is also a good idea for black, leading to the same opening as 1.32 – 28 18 – 23 2.33 – 29 23 x 32 3.37 x 28 17 – 22 4.28 x 17 11 x 22 5.39 – 33 13 – 18 with exchanged colors.

4.40 – 34 1 – 7 5.45 – 40 19 – 23

5… 20 – 25 6.42 – 38 15 – 20 7.50 – 45 10 – 15 Another popular line is 7… 19 – 23 8.28 x 19 14 x 23 9.32 – 28 23 x 32 10.37 x 28 20 – 24 11.29 x 20 25 x 14 etc. 8.31 – 26

The sharpest move here is 8… 16 – 21. 8… 5 – 10 is usually met by 9.36 – 31 but the aggressive 9.28 – 23 19 x 28 10.32 x 23 can also be played. 9.37 – 31 11 – 16 10.31 – 27 10.41 – 37? White should play 10.31 – 27 22 x 31 11.26x37 5 – 10 12.29 – 24 etc. taking a right wing attack. 10… 7 – 11 11.46 – 41 4 – 10! 12.47 – 42 2 – 7 leads to a difficult situation for white. The special move 4 – 10 is played to meet the 29 – 24 attack. If black played 5 – 10 he would not be able to attack the outpost since the 14 – 19 attack at the outpost would then be punished by the 31 – 27 29 – 24 27 – 22 32 x 5 kingshot. If white indeed takes the attack the game can continue with 13.29 – 24 20 x 29 14.34 x 23 18 x 29 15.33 x 24 22 x 33 16.38 x 29 19 x 30 17.35 x 24 14 – 19 18.40 – 35 19 x 30 19.35 x

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24 10 – 14 20.44 – 40 14 – 19 21.40 – 35 19 x 30 22.35 x 24 5 – 10 and white has huge problems defending his outpost (see C. Pippel – Mathijssen game in appendix).

6.28 x 19 14 x 23 7.32 – 28 23 x 32 8.37 x 28 16 – 21 9.43 – 38

with a modern game. Black can try to get a Roozenburg attack.

The seagull

1.33 – 28 17 – 21 2.39 – 33

If white wants to avoid complications 2.31 – 26 20 – 24 3.26 x 17 11 x 33 4.38 x 20 15 x 24 can be played.

2… 21 – 26 3.44 – 39 11 – 17 4.50 – 44

Black has now several possibilities. Let’s consider two of them:

1) 4… 6 – 11 5.31 – 27 19 – 23 5… 1 – 6? can be strongly met by 6.28 – 23 19 x 28 7.32 x 23 18 x 29 8.34 x 23 with centre attack. 5… 17 – 21 6.27 – 22 18 x 27 7.28 – 23 19 x 28 8.33 x 31 is not very exciting… 6.28 x 19 14 x 23 7.33 – 28 9 – 14 8.28 x 19 14 x 23 9.38 – 33 10 – 14 10.34 – 30. White will try to surround the black centre. White will not play 33 – 28 but he will try to get control over <29> later.

2) 4… 7 – 11 5.31 – 27 If white doesn’t want to play this line, he can choose 5.33 – 29 20 – 24 6.29 x 20 15 x 24 7.38 – 33 10 – 15 8.42 – 38 etc. 6 … 17 – 22 7.28 x 17 11 x 31 8.36 x 27 19 – 23 9.35 – 30 White now can’t successfully surround black’s centre, because black’s left wing is too strong. He would better try to get a Roozenburg attack after 20 – 25 10.33 – 29 etc.

1.34 – 29 Fork-lock-opening

1.34 – 29 19 – 23 2.40 – 34

After 2.33 – 28 23 x 34 both 3.40 x 29 and 3.39 x 30 are played. After 3.39 x 30 white will correct the distribution of pieces quickly again by playing 38 – 33 42 – 38 47 – 42 etc.

2… 14 – 19 3.45 – 40

3.33 – 28 is an interesting variation leading to modern play. A critical line is 3…17 – 22 4.28 x 17 11 x 22 5.39 – 33 10 – 14 6.43 – 39 12 – 17 7.48 – 43 6 – 11 8.45 – 40 5 – 10 9.32 – 28 23 x 32 10.37 x 28 8 – 12 11.41 – 37 16 – 21 12.31 – 26 20 – 24 13.29 x 20 15 x 24 14.46 – 41 21 – 27 with a Roozenburg attack for black.

Another popular line in this opening is 5… 7 – 11 6.43 – 39 10 – 14 7.48 – 43 5 – 10 8.45 – 40 1 – 7 9.32 – 28 After 9.31 – 26 black should take care not to fall victim to the shot 9… 12 – 17? 10.26 – 21! 17 x 26* 11.32 – 28 23 x 32 12.37 x 17 11 x 22 13.29 – 24 20 x 29 14.34 x 1 W+. 9… 23 x 32 10.37 x 17 11 x 22 11.41 – 37 16 – 21 12.31 – 26 21 – 27 13.37 – 31 with an interesting game.

3… 10 – 14 4.50 – 45

4.32 – 28 23 x 32 5.37 x 28 is a frequently played alternative.

4… 5 – 10

Chizov-opening

Tenfold world champion Alexeï Chizhov likes to play 5.29 – 24 20 x 29 6.33 x 24 19 x 30 7.34 x 25, for example: 13 – 19 8.38 – 33 8 – 13 9.42 – 38 15 – 20 10.39 – 34 2 – 8 11.44 – 39 10 – 15 12.47 – 42 White trying to get pressure at black’s left wing. At 12… 20 24 he plays 13.34 – 29 23 x 34 14.40 x 20 15 x 24 15.45 – 40 18 – 23 16.32 – 28 23 x 32 17.37 x 28 12 – 18 18.40 – 34 etc. At 12… 17 – 21 he can play 13.34 – 29 23 x 34 14.39 x 30 etc.

Fork-lock-variation 1

5.31 – 26 20 – 25 6.37 – 31 14 – 20 7.41 – 37 10 – 14

The solid 7.20 – 24 8.29 x 20 25 x 14 has been played many times, but we follow a more interesting line.

8.46 – 41 5 – 10 9.32 – 28 23 x 32 10.37 x 28 19 – 23 11.28 x 19 13 x 24

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Black has fork-locked the opponent. From this popular theoretical position the main line is: 12.41 – 37 8 – 13 13.37 – 32 2 – 8 14.42 – 37 14 – 19

15.48 – 42

After 15.47 – 41 17 – 22 white should not play 16.48 – 42 10 – 14 17.32 – 28 because of 12 – 17! with tactical problems for white, for 18.37 – 32 is punished by 18 – 23! 19.29 x 27 24 – 29 20.33 x 24 20 x 29 21.34 x 23 17 – 22 22.27 x 18 13 x 33 23.39 x 28 16 – 21 24.26 x 17 11 x 33 25.38 x 29 19 x 50 B+, but 16.32 – 28 10 – 14 17.28 x 17 12 x 21 18.26 x 17 11 x 22 19.38 – 32 8 – 12 20.33 – 28 22 x 33 21.29 x 38 like in Dibman – Stokkel (1983) (see appendix).

15… 10 – 14 16.31 – 27 17 – 21 17.26 x 17 11 x 31 18.37 x 26

with an interesting fight in the fork-lock.

Fork-lock-variation 2 1.34 – 29 20 – 25 2.40 – 34 14 – 20

3.45 – 40 10 – 14

Black can take the fork-lock at once, if he wishes, playing 3… 19 – 24.

4.32 – 28

From here there also often will emerge a fork-lock-position: 4… 5 – 10 can be met by the 28 – 23 & 29 – 24 exchange, so more principal is 4… 17 – 21 after which white could take a right wing attack, by playing either 5.29 – 24 or allow a chain-lock playing either 5.31 – 26 19 – 24 6.26 x 17 11 x 22 7.28 x 17 12 x 21 or 5.37 – 32 5 – 10 6.41 – 37 19 – 23 7.28 x 19 13 x 24 8.32 – 28 21 – 26 etc.

The peacock

1.34 – 29 17 – 22 2.40 – 34 11 – 17

3.45 – 40 6 – 11 4.50 – 45 1 – 6 5.31 – 26 16 – 21 leads to the Keller-opening, but white can also play:

3.32 – 28 6 – 11 4.37 – 32 19 – 23 5.28 x 19 14 x 23 6.41 – 37 10 – 14

If black wants to eliminate the 7.35 – 30 move he can play 6… 13 – 19, for example 7.46 – 41 10 – 14 8.45 – 40 5 – 10 9.32 – 28 23 x 32 10.37 x 28 16 – 21 11.31 – 26 19 – 23 12.28 x 19 14 x 23 etc.

7.35 – 30 20 – 25 8.45 – 40 5 – 10

9.40 – 35 would allow 23 – 28 32 x 23 22 – 27 31 x 22 17 x 19 and white’s right wing will be locked. Therefore white should make sure he still has the 30 – 24 29 – 23 33 x 35 exchange if black takes the 23 – 28 22 – 27 exchange.

9.46 – 41 14 – 19

At 9… 1 – 6 white plays 10.50 – 45.

10.40 – 35

Black has to choose between playing 10 – 14 and 9 – 14 & 3 – 9. 10… 10 – 14 can be met by 11.32 – 28 23 x 12.37 x 28 16 – 21 with an interesting, modern game. The alternative is 11.44 – 40 14 – 20 12.50 – 45 20 – 24 Black can’t take a centre attack playing 12… 22 – 28? 13.33 x 22 17 x 28 because of the shot 14.29 – 24! 20 x 29 15.30 – 24 29 x 20 16.34 – 30 25 x 34 17.40 x 29 23 x 34 18.32 x 25 W+1. 13.29 x 20 15 x 24 and white can simply play 14.34 – 29 23 x 34 15.40 x 20 25 x 14 16.31 –

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27 22 x 31 17.37 x 28 or play the more complex 14.31 – 27 22 x 31 15.36 x 27.

If black plays 10… 9 – 14 white will try to get a Roozenburg attack: 11.44 – 40 3 – 9 12.50 – 45 1 – 6 13.31 – 27 22 x 31 14.36 x 27 etc.

1.34 – 29 17 – 21

Usually this opening will be the same as after 1.32 – 28 17 – 21 2.34 – 29 21 – 26 etc. like after 1.34 – 29 17 – 21 2.39 – 33 21 – 26 3.44 – 39 11 – 17 4.50 – 44 6 – 11 5.32 – 28 17 – 21 etc.

1.34 – 30 The French opening

1.34 – 30 20 – 25

The most frequently played continuation is 2.32 – 28 25 x 34 3.39 x 30 and after 16 – 21 4.37 – 32 21 – 26 5.32 – 27 26 x 37 6.41 x 32 15 – 20 7.46 – 41 20 – 24 the game will continue along classical lines.

The Cheetah

2.30 – 24 19 x 30 3.25 x 24

This sharp continuation is the fastest way to get a right wing attack from the opening, which fully explains the name of this opening..

3… 18 – 22

This is the sharpest continuation. 3… 18 – 23 should be answered by 4.40 – 34 4.32 – 28? 23 x 32 5.37 x 28 isn’t good for black is going to attack the outpost repeatedly with huge problems for white. His right wing will be demolished. 4… 14 – 20 4… 14 – 19 5.34 – 30 25 x 34 6.39 x 30 10 – 14 7.30 – 25 19 x 30 8.25 x 34 gives white a slight advantage. Piece 35 is centralized. 5.44 – 40 20 x 29 6.33 x 24 10 – 14 7.50 – 44 14 – 20 8.32 – 28 White should be aware of the shot after 9.39 – 33? 20 x 29 10.33 x 24 23 – 28! 11.32 x 23 12 – 18 12.23 x 21 16 x 27 13.31 x 22 13 – 18 14.22 x 13 8 x 50 B+. 8…. 23 x 32 9.37 x 28 20 x 29 10.34 x 23 and there is nothing wrong with white’s centre attack.

4.33 – 29

Another quite popular line is 4.31 – 26 14 – 19 5.40 – 35 19 x 30 6.35 x 24 10 – 14 7.24 – 20 15 x 24 8.33 – 28 22 x 33 9.38 x 20 and the future piece at <15> promises an interesting game.

4… 14 – 20 5.38 – 33 10 – 14 6.32 – 28

After 6.42 – 38 16 – 21 7.31 – 26 11 – 16 8.37 – 31 21 – 27 9.32 x 21 16 x 27 10.41 – 37 6 – 11 11.37 – 32 11 – 16 12.32 x 21 16 x 27 13.46 – 41 14 – 19 white should give up his outpost at <24> to attack the outpost at <27>: 14.41 – 37 19 x 30 15.40 – 34 13 – 18 16.37 – 32 9 – 13 17.32 x 21 like Gantwarg – Wiersma (1979).

6… 16 – 21 7.37 – 32 11 – 16 8.43 – 38 6 – 11 9.31 – 27 22 x 31

10.36 x 27 21 – 26 11.41 – 36

After 11.41 – 37 1 – 6! The 17 – 22 threat would force white to flee to the edge of the board with the poor 27 – 21 x 21. Therefore white is almost forced to play 11.41 – 36. Black can choose between two sharp plans:

1) 11… 17 – 21 12.46 – 41 12 – 17 13.41 – 37 7 – 12 14.37 – 31 26 x 37 15.42 x 31 21 – 26 16.47 – 42 26 x 37 17.42 x 31 1 – 6 with the idea of reducing white’s space more and more.

2) 11… 4 – 10 12.47 – 41

12.46 – 41? is wrong, for after 14 – 19 13.40 – 35 19 x 30 14.35 x 24 9 – 14 15.44 – 40 14 – 19 16.40 – 35 19 x 30 17.35 x 24 10 – 14 18.45 – 40 26 – 31! black wins a piece, because 19.27 – 21 16 x 27 20.32 x 21 17 x 26 21.36 x 27 is met by 25 – 30 22.24 x 35 20 – 24 23.29 x 18 12 x 45 B+1 and 19.27 – 22 is punished by 13 – 18! 20.36 x 27 18 – 23 21

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21.28 x 10 17 x 46 22.10 – 4 46 – 28! 23.33 x 22 8 – 13 24.4 x 18 17 x 21 B+.

12… 26 – 31! This surprising move is based on the kingshot after 13.27 – 22? 13 – 19!! 14.24 x 4 14 – 19 15.36 x 27 8 – 13 16.4 x 18 12 x 43 17.48 x 39 19 – 23 18.28 x 19 17 x 48 B+.

13.27 – 21 16 x 27 14.32 x 21 17 x 26 15.36 x 27 14 – 19 16.40 – 35 19 x 30 17.35 x 24 9 – 14 18.44 – 40 14 – 19 19.40 – 35 19 x 30 20.35 x 24 10 – 14 21.28 – 23 22.45 – 40 loses a piece as we already saw, so white has to defend piece 24 horizontally. 21… 13 – 19 22.24 x 13 8 x 28 23.33 x 22 14 – 19 with advantage for black.

Ottink-variation

1.34 – 30 17 – 22 2.30 – 25 11 – 17 3.31 – 26 6 – 11 4.37 – 31

Black can take a right wing attack playing 4… 22 – 27 5.32 x 21 16 x 27 6.31 x 22 18 x 27 7.41 – 37 13 – 18 or allow a fork lock after 4… 1 – 6 5.32 – 27 19 – 23 6.33 – 29 23 x 34 7.40 x 29 with the so-called Ottink-variation. Instead of the usual 7… 13 – 19 black can play sharper: 7… 20 – 24 5.29 x 20 15 x 24 8.45 – 40 13 – 19 9.40 – 34 19 – 23 10.34 – 29 23 x 34 11.39 x 19 14 x 23 with an interesting game with the fork-lock.

1.31 – 27 Polish opening

This opening move gives black the opportunity to play against white’s left wing. White allows this in order to get surrounding chances against the black centre.

Semi-classical opening

1.31 – 27 19 – 23 2.33 – 28 17 – 21

After 2… 17 – 22 2.28 x 19 22 x 31 3.36 x 27 14 x 23 4.41 – 36 11 – 17 5.46 – 41 white wants to build an cannon at his left wing. 10 – 14 6.37 – 31 14 – 19 7.38 – 33 5 – 10 8.42 – 38 10 – 14 9.41 – 37 6 – 11 10.47 – 41 1 – 6 11.34 – 29 23 x 34 12.39 x 30 like Sijbrands – J. Palmans 2008.

1… 20 – 25 2.28 x 19 14 x 23 can potentially lead to positions from the Russian bear (1.32 – 28 20 – 25).

3.28 x 19 14 x 23 4.39 – 33

This is the modern continuation. White used to play 4.38 – 33 with the same strategy. White wants to get an initiative at the right wing. If black occupies <24> white uses the power block to put pressure. Further on in the game white wants to control <29>. He will not play the 33 – 28 move in the early stages of the game, but play at the right wing. That’s why this game type is called semi-classics, white won’t make the game closed classical, but tries to take <29> under control, surrounding the black centre. 4.38 – 33 21 – 26. A move like 4… 13 – 19 would allow white to free his ‘big belly’ at the left wing playing 5.37 – 31 8 – 13 6.31 – 26 etc. 5.34 – 30 10 – 14 6.30 – 25 (doesn’t allow 20 – 24 which is actually an option for black after 4.39 – 33 10 – 14 5.34 – 30 21 – 26 6.30 – 25) 6… 14 – 19 7.25 x 14 9 x 20 Black can also take backwards, but white then gets more space for getting the right wing under control. 8.35 – 30 5 – 10 9.43 – 38 We show the critical line, white can play more safely by 30 – 25 and then the moves 40 – 34, 44 – 40 and 49 – 43. 9… 10 – 14 10.49 – 43 4 – 9 11.40 – 35 11 – 17 12.45 – 40 7 – 11 13.39 – 34?! 20 – 25! 14.44 – 39 14 – 20 15.33 – 29 like in Wiersma – J. v.d. Wal (1979).

4… 10 – 14 5.34 – 30

Important other continuations are 5.33 – 28 and 5.44 – 39.

5.33 – 28 and now 3 possibilities:

1) 4… 14 – 19 5.44 – 39 21 – 26 5… 5 – 10? is punished by the Arc shot 27 – 22! 18 x 27 38 – 33 27 x 29 37 – 31 23 x 32 34 x 5. W+ White can try to trap the opponent playing 7.34 – 30 5 – 10? and perform the so-called coup Raman: 8.30 – 24!! 20 x 29 (19 x 30 28 x 19 13 x 24 37 – 31 26 x 28 39 – 33 28 x 39 43 x 5 W+) 8.27 – 22 18 x 27 9.32 x 21 23 x 32 (otherwise 39 – 34 follows) 10.38 x 27 26 x 17 11.27 – 22 17 x 28 12.39 – 33 ad lib. 13.43 x 5 W+. But black can make an exchange playing 7… 26 – 31 8.37 x 26 18 – 22 9.27 x 29 19 –

91

24 10.30 x 19 13 x 44 11.50 x 39 16 – 21 12.26 x 17 11 x 44 13.43 – 39 44 x 33 14.38 x 29 with a slight edge for black. Positionally more correct is 7.36 – 31 because black can’t play at <17> white can play 41 – 36 at the next move, always able to change after 11 – 17 with 27 – 21 developing his left wing and 12 – 17 is usually prohibited because of the bomb shot, for example: 7.36 – 31 5 – 10 8.41 – 36 10 – 14 9.34 – 30 12 – 17? 10.30 – 24! 20 x 29 11.27 – 21 16 x 27 12.32 x 12 23 x 41 13.12 x 34 W+1.

2) 5… 13 – 19 In this case white’s positionally correct move is 6.36 – 31 (followed by 41 – 36) but he can try to trap his opponent playing 6.44 – 39 8 – 13 7.34 – 30!? 20 – 24? 8.27 – 22! 18 x 27 9.38 – 33 27 x 29 10.39 – 34 23 x 32 11.34 x 23 19 x 28 12.30 x 26 winning the piece at <32>.

3) 5… 5 – 10 6.28 x 19 14 x 23 7.44 – 39

Black has to dodge a famous trap, that has made countless victims already: the coup Lochtenberg: 7… 10 – 14? 8.27 – 22! 18 x 27 9.36 – 31 27 x 36 10.32 – 27 21 x 32 11.37 x 10 9 – 14 12.10 x 19 13 x 24 13.34 – 30 3 – 9 14.30 x 19 4 – 10 14… 9 – 13 15.40 – 34 13 x 24 16.34 – 30 4 – 9 17.30 x 19 9 – 13 18.39 – 34 13 x 24 19.34 – 30 24 – 29 20.30 – 25 20 – 24 21.25 – 20 8 – 13 22.38 – 33 29 x 38 23.20 x 29 W+1. 15.35 – 30! Preventing 9 – 14 while 20 – 24 is met by the stick move 20 – 14 W+. 15… 20 – 25 16.41 – 37 25 x 34 17.40 x 29 12 – 18 Black tries to get back the lost piece, at 17… 15 – 20 there is a similar shot beginning with 29 – 24 & 19 – 14.

18.19 – 13! 8 x 19 19.29 – 23 ad lib. 20.37 – 31 36 x 27 21.38 – 32 ad lib. 22.42 x 4 W+.

Black can play (from the last diagram) 7 … 21 – 26 8.38 – 33! White is creating the crucial 33 / 39 formation making 13 – 19, which would strengthen black’s left wing (13 – 19 8 – 13 2 – 8), unattractive because of 37 – 31! 26 x 28 33 x 24 20 x 29. Usually the game continues something like: 8… 10 – 14 9.34 – 30 14 – 19 10.30 – 25 9 – 14 11.35 – 30 4 – 9 12.40 – 35 11 – 17 13.43 – 38 20 – 24 14.49 – 43 etc.

5… 14 – 19 6.30 – 25 21 – 26

After 6… 20 – 24 white builds the power block playing 44 – 39 40 – 34 34 – 30 45 – 40 50 – 45 49 – 34.

7.25 x 14 9 x 20

7… 19 x 10 isn’t bad, but white gets more space at the right wing.

8.35 – 30 5 – 10 9.30 – 25 10 – 14 10.44 – 39 4 – 9 11.40 – 34 20 – 24

Another logical line is 11… 11 – 17 12.45 – 40 7 – 11 13.50 – 45 17 – 21 14.34 – 30 20 – 24 15.40 – 35 11 – 17 16.49 – 44 etc.

12.45 – 40 11 – 17 13.50 – 45 14 – 20 14.25 x 14 9 x 20

Black tries to get control over <24> but 15.40 – 35 can lead to a fierce fight, like in the Hoogendoorn – W. van der Kooij game in which white managed to get control over <29> later anyhow!

Left-wing-opening

1.31 – 27 17 – 21

92

White can play the simple 2.37 – 31 21 – 26 3.32 – 28 26 x 37 4.41 x 32 developing his left wing. 2.37 – 31 19 – 23 3.31 – 26 is also possible, but quite boring after 20 – 24 26 x 17 11 x 31 36 x 27 24 – 29 33 x 24 23 – 28 32 x 23 18 x 20 =, but 3.41 – 37 21 – 26 4.33 – 28 11 – 17 5.28 x 19 14 x 23 6.27 – 21 16 x 27 31 x 11 6 x 17 isn’t exciting either.

Playing 2.33 – 28 can lead to the same varition as before, but if black plays 21 – 26 3.39 – 33 11 – 17 4.44 – 39 17 – 22 5.28 x 17 12 x 21 instead of 19 – 23 x 23, it’s harder for white to get a good surrounding play, as we already saw in the 1.33 – 28 17 – 21 Seagull opening. 6.33 – 28 7 – 12 7.50 – 44 1 – 7 8.38 – 33 7 – 11 If black changes 19 – 23 x 23 white frees his left wing by 32 – 28 23 x 32 27 x 38. 9.43 – 38 19 – 23 10.28 x 19 14 x 23 11.33 – 28 9 – 14 12.28 x 19 14 x 23 13.38 – 33 10 – 14 14.32 – 28 23 x 32 15.27 x 38 20 – 24 white trailing 8 temps, giving black the initiative.

The big leap

1.31 – 27 17 – 22

White can play many moves like 2.37 – 31 19 – 23 3.31 – 26 22 x 31 4.26 x 37 or 2.32 – 28 22 x 31 3.36 x 27. However, the most exciting continuation is:

2.36 – 31 22 – 28

2… 19 – 23 3.34 – 29 23 x 34 4.40 x 29 14 – 19 5.32 – 28 is very solid.

3.32 x 23 19 x 28 4.33 x 22 16 – 21 5.27 x 16 18 x 36

White can also take 2.33 x 22 16- 21 3.27 x 16 18 x 36. In both cases the piece at <36> promises an interesting fight.

The edge-opening

1.31 – 26 19 – 23 2.36 – 31 14 – 19 3.41 – 36

Another popular line is 3.33 – 28 20 – 24 4.39 – 33 10 – 14 5.44 – 39 14 – 20 6.41 – 36 5 – 10 7.46 – 41 10 – 14 8.34 – 29 23 x 34 9.40 x 29 18 – 23 10.29 x 18 12 x 23 11.31 – 27 7 – 12 12.45 – 40. In this position many players

have overlooked the simple shot after 12… 13 – 18? 13.28 – 22! 17 x 28 14.33 x 13 9 x 18 15.27 – 22 18 x 27 16.32 x 21 16 x 27 17.35 – 30 24 x 33 18.38 x 16 winning piece <27>. Usually black plays 12… 20 – 25.

3… 10 – 14 4.46 – 41 5 – 10 5.31 – 27 20 – 24 6.36 – 31 15 – 20 7.33 – 28 10 – 15 8.41 – 36 4 – 10 9.47 – 41 17 – 21 10.26 x 17 11 x 33 11.39 x 28 23 – 29 12.34 x 23 18 x 29

13.27 – 21 16 x 27 14.31 x 22 6 – 11 leads to an exciting game as in Valneris – Chizhov (2001). Of course there are many more variations in this opening, but we showed one of the most interesting ones.

When playing this opening with black, you have to take care for the trap called the Mountain shot after 1.31 – 26 19 – 23 2.37 – 31 14 – 19 3.33 – 29 (this move can also be played later on) 10 – 14 4.41 – 37 5 – 10 5.46 – 41 20 – 25 6.39 – 33

6… 14 – 20? 7.26 – 21!! 17 x 26 8.32 – 28 23 x 32 9.37 x 28 26 x 46 10.29 – 23 18 x 29 11.34 x 5 and black’s king is caught or 7.26 – 21 16 x 27 8.32 x 21 17 x 26 9.33 – 28 23 x 32 10.37 x 28 26 x 46 11.29 – 23 18 x 29 12.34 x 5 with the same result. Black can play 6… 15 – 20 7.44 – 39 10 – 15 8.50 – 44 4 – 10 9.32 – 28 23 x 32 10.37 x 28 19 – 23 11.28 x 19 13 x 24 with the fork-lock position from 1.34 – 29 19 – 23.

Rejected edge-opening

1.31 – 26 17 – 21 2.26 x 17 11 x 22

93

This opening usually transposes to 1.32 – 28 17 – 22 2.28 x 17 11 x 22 3.37 – 32. If white plays 3.37 – 31 we arrive at the same position.

Of course black can play all moves, of which 1.31 – 26 18 – 23 is a frequently played one, but we will not elaborate on this possibilities here.

1.35 – 30 The wild horse

The sharpest of opening moves is 1.35 – 30. It ois also the rarest opening move, but can lead to exciting games!

1.35 – 30 20 – 25 2.40 – 35

2.33 – 29 15 – 20 3.29 – 23 white taking an early centre attack is called the Agafonov-opening.

2… 15 – 20 3.45 – 40 20 – 24

3… 17 – 22 is a good move too, after 4.32 – 28 20 – 24 etc. white plays with a locked right wing, like in a Schwarzman – Chizhov world championship match.

4.33 – 29 24 x 33 5.38 x 29

5… 17 – 22

5… 10 – 15 6.50 – 45 5 – 10 7.42 – 38 16 – 21! is also a popular line. 8.31 – 26 isn’t attractive now, because of 17 – 22 26 x 28 18 – 23 29 x 18 13 x 31 36 x 27 15 – 20 and white is getting locked. At 8.39 – 33 black plays 21 – 27 9.32 x 21 17 x 26. White can choose to play 8.38 – 33 21 – 27 9.31 x 22 18 x 38 10.43 x 32 or 10.33 x 42 like Georgiev played against Schwarzman in 2003.

8.47 – 41 21 – 26 9.39 – 33 and black can opt for either 9… 17 – 22 or the continuation Sijbrands chose against Cordier: 9… 15 – 20 10.44 – 39 19 – 24 11.30 x 19 13 x 24 12.49 – 44 9 – 13 13.35 – 30 24 x 35 14.29 – 23 18 x 29 15.33 x 15 with an exciting game with the edge piece at <15> (see appendix).

6.43 – 38

6.42 – 38? is punished by 19 – 24! 7.29 x 20 22 – 28 8.32 x 23 18 x 29 9.34 x 23 25 x 45 and piece 23 will be shelled.

6… 11 – 17 7.38 – 33 6 – 11

White can now choose between 8.32 – 28 and the immediate 8.30 – 24 19 x 30 9.35 x 24 both leading to a quick right wing attack.

Opening ceremony of a Chinese draughts event

Epilogue

Many openings can be studied much deeper. If you want to do this it is very helpful to have the games database called Turbo Dambase, produced by Klaas Bor. This database contains some 300,000 games.

94

Appendix openings

1.32 – 28 19 – 23

Roozenburg-variation

Wiersma – Kuyken 1973 (2-0)

1.32-28 19-23 2.28x19 14x23 3.37-32 10-14 4.35-30 20-25 5.33-29 5-10

6.40-35 14-19 7.41-37 10-14 8.46-41 17-22 9.31-27 22x31 10.36x27 11-17

11.45-40 6-11 12.30-24 19x30 13.35x24 14-20 14.38-33 17-21 15.42-38 21-26

16.41-36 11-17 17.48-42 1- 6 18.50-45 4-10 19.33-28 9-14 20.28x19 14x23

21.38-33 6-11 22.36-31 10-14 23.43-38 14-19 24.40-35 19x30 25.35x24 17-21

26.33-28 12-17 27.28x19 18-23 28.29x 9 20x40 29.45x34 3x23 30.47-41 7-12

31.49-43 8-13 32.39-33 12-18 33.44-40 13-19 34.33-28 18-22 35.27x29 21-27

36.32x12 11-17 37.12x21 16x47 38.29-23 19-24 39.28-22 24-30 40.34-29 30-34

41.22-17 34x45 42.17-11 47-36 43.11- 6 2- 7 44.38-33 45-50 45.43-39 50-45

46.42-38 7-11 47. 6x17 15-20 48.17-12 20-24 49.29x20 45x 7 50.20-14 7-23

Drost-variation

Wiersma - Georgiev 1995 (2-0)

1.32-28 19-23 2.28x19 14x23 3.37-32 10-14 4.41-37 5-10 5.46-41 14-19

6.35-30 20-25 7.33-29 17-22 8.40-35 11-17 9.31-27 22x31 10.36x27 6-11

11.45-40 17-21 12.38-33 11-17 13.30-24 19x30 14.35x24 21-26 15.43-38 17-21

16.41-36 12-17 17.33-28 7-12 18.28x19 17-22 19.40-35 22x31 20.36x27 12-17

21.27-22 18x27 22.29-23 27-31 23.39-33 17-22 24.32-28 13-18 25.23x12 8x17

26.49-43 31-36 27.44-39 21-27 28.28-23 27-31 29.50-44 17-21 30.34-30 25x34

31.39x30 9-14 32.30-25 2- 8 33.44-39 4- 9 34.39-34 9-13 35.34-30 3- 9

36.38-32 1- 6 37.43-38 6-11 38.48-43 11-17 39.43-39 22-27 40.39-34 8-12

41.19x 8 12x 3 42.23-18 17-22 43.34-29 22x13 44.29-23 3- 8 45.33-28 8-12

46.23-19 14x23 47.28x17 21x12 48.32x21 16x27 49.47-41 36x47 50.38-33 47x20

51.25x 3 31x42 52. 3x47 26-31 53.30-24 31-37 54.35-30 10-14 55.30-25 15-20

56.24x15 14-19 57.25-20 19-23 58.15-10

Springer Contra Attaque

Traoré - Gantwarg 1980 (0–2)

1.32-28 19-23 2.28x19 14x23 3.37-32 10-14 4.41-37 14-19 5.46-41 5-10

6.35-30 20-25 7.33-29 10-14 8.40-35 17-22 9.31-27 22x31 10.36x27 23-28

11.32x23 19x28 12.38-32 13-19 13.32x23 19x28 14.41-36 8-13 15.37-31 18-22

16.27x18 13x22 17.39-33 28x39 18.44x33 4-10 19.42-38 11-17 20.38-32 6-11

21.32-28 16-21 22.47-42 12-18 23.43-38 9-13 24.45-40 22-27 25.31x22 18x27

26.42-37 7-12 27.50-44 21-26 28.48-43 17-21 29.44-39 11-16 30.38-32 27x38

31.33x42 1- 7 32.42-38 13-18 33.39-33 2- 8 34.28-23 18-22 35.38-32 14-20

36.43-38 7-11 37.32-28 11-17 38.38-32 22-27 39.49-44 27x38 40.33x42 10-14

41.36-31 8-13 42.42-38 14-19 43.23x14 20x 9 44.38-32 12-18 45.30-24 18-22

46.28-23 22-28 47.23-19 28-33 48.19x 8 3x12 49.29x38 17-22 50.44-39 21-27

51.32x21 16x36 52.38-32 22-27 53.32x21 26x17 54.39-33 17-22 55.34-29 22-27

56.29-23 27-31 57.37x26 36-41 58.40-34 41-47 59.33-29 12-17 60.26-21 17x26

61.23-18 9-14 62.29-23 47x20 63.34-30 25x34 64.18-13 20-24 65.23-19 14x23

66.13- 9 34-39 67. 9- 3 39-43 68. 3-14

95

Chizhov-exchange

Chizhov - Wesselink 1987 (2-0)

1.32-28 19-23 2.28x19 14x23 3.37-32 10-14 4.41-37 5-10 5.34-29 23x34

6.39x30 14-19 7.44-39 10-14 8.40-34 18-23 9.45-40 12-18 10.46-41 7-12

11.32-28 23x32 12.37x28 17-22 13.28x17 11x22 14.50-45 1- 7 15.30-25 16-21

16.31-26 21-27 17.34-30 19-23 18.33-29 23x34 19.40x29 4-10 20.41-37 27-31

21.36x27 22x31 22.38-33 31-36 23.42-38 20-24 24.30x19 14x34 25.39x30 10-14

26.49-44 18-23 27.37-32 13-19 28.44-40 14-20 29.25x14 9x20 30.43-39 8-13

31.40-34 2- 8 32.48-43 13-18 33.33-29 20-25 34.30-24 19x30 35.35x24 12-17

36.39-33 3- 9 37.32-27 18-22 38.29x18 22x13 39.38-32 13-18 40.45-40 17-22

41.34-29 22x31 42.26x37 6-11 43.33-28 11-17 44.43-38 8-12 45.28-23 17-21

46.32-28 7-11 47.37-31 36x27 48.28-22 9-13 49.22x31 21-27 50.31x22 18x27

51.38-33 27-32 52.40-34 11-17 53.47-41 25-30 54.34x25 17-21 55.41-36 32-37

56.23-19 13-18 57.36-31 37x26 58.19-14 26-31 59.14- 9 31-36 60. 9- 3 21-26

61. 3x17 36-41 62.17-28 41-47 63.28-32 47-36 64.33-28 36-31 65.28-23 18-22

66.23-19 22-27 67.32x16 31-37 68.29-23 26-31 69.16-32 37x28 70.23x32 31-36

71.19-13 36-41 72.13- 8 41-46 73.32-27 46-28 74. 8- 2 28-41 75.27-21 41-23

76.21-17

Chizhov - Berçot 2002 (2-0)

1.32-28 19-23 2.28x19 14x23 3.37-32 10-14 4.41-37 5-10 5.34-29 23x34

6.39x30 14-19 7.44-39 10-14 8.40-34 18-23 9.46-41 12-18 10.32-28 23x32

11.37x28 7-12 12.41-37 1- 7 13.45-40 17-21 14.50-45 21-26 15.38-32 18-23

16.30-25 20-24 17.34-29 23x34 18.40x20 15x24 19.39-34 4-10 20.43-39 12-18

21.49-44 18-23 22.44-40 7-12 23.34-30 11-17 24.31-27 17-21 25.39-34 10-15

26.42-38 12-18 27.47-42 6-11 28.34-29 23x34 29.40x20 15x24 30.27-22 18x27

31.45-40 27-31 32.36x27 13-18 33.28-23 19x39 34.30x10 18-22 35.27x18 9-13

36.18x 9 3x 5 37.40-34 39x30 38.35x24 8-13 39.25-20 21-27 40.32x21 16x27

41.38-33 11-17 42.20-14 2- 8 43.42-38 17-21 44.48-43 27-31 45.24-19 31x42

46.38x47 13x24 47.14- 9 8-13 48. 9x18 26-31 49.18-12 31-37 50.12- 7 24-30

51.43-39 5-10 52. 7- 2 30-35 53.39-34 10-14 54.34-30 35x24 55. 2x30 21-26

56.30-48

Groninger variation

Greveraars - Thijssen 1997 (0–2)

1.32-28 19-23 2.28x19 14x23 3.37-32 10-14 4.41-37 5-10 5.46-41 14-19

6.32-28 23x32 7.37x28 9-14 8.41-37 16-21 9.31-26 18-22 10.38-32 11-16

11.43-38 3- 9 12.48-43 7-11 13.34-29 20-24 14.29x20 15x24 15.40-34 21-27

16.32x21 16x27 17.37-32 11-16 18.32x21 16x27 19.34-30 13-18 20.30-25 1- 7

21.45-40 18-23 22.50-45 23x32 23.33-29 24x33 24.39x37 6-11 25.37-32 11-16

26.32x21 16x27 27.42-37 7-11 28.47-41 2- 7 29.37-32 11-16 30.32x21 16x27

31.41-37 7-11 32.44-39 12-18 33.37-31 19-24 34.38-32 27x38 35.43x32 9-13

36.32-27 14-19 37.40-34 19-23 38.34-30 23-28 39.30x19 13x24 40.27-21 8-12

41.21-16 28-32 42.16x 7 12x 1 43.49-43 22-28 44.45-40 18-23 45.40-34 10-14

46.31-27 32x21 47.36-31 24-29 48.43-38 29x40 49.35x44 23-29 50.44-40 17-22

51.26x17 22x11 52.40-35 11-16

96

1.32 – 28 18 – 23 Chefneux The Fox

A. Chizhov – A. Shwarzman 1998 (1-1)

1.32-28 18-23 2.33-29 23x32 3.37x28 20-25 4.41-37 12-18 5.37-32 16-21

6.29-24 19x30 7.35x24 11-16 8.39-33 7-12 9.44-39 14-20 10.50-44 20x29

11.33x24 10-14 12.46-41 1- 7 13.41-37 14-19 14.40-35 19x30 15.35x24 9-14

16.39-33 3- 9 17.43-39 5-10 18.31-26 18-22 19.48-43 21-27 20.32x21 16x27

21.37-32 14-20 22.32x21 20x40 23.45x34 10-14 24.28-23 22-28 25.33x11 7x27

26.42-37 6-11 27.44-40 12-17 28.37-32 8-12 29.32x21 11-16 30.47-42 16x27

31.42-37 2- 7 32.37-32 13-19 33.32x21 19x28 34.38-33 17-22 35.36-31 9-13

36.33-29 4- 9 37.49-44 13-18 38.29-24 18-23 39.34-29 23x45 40.24-20 15x24

41.44-40 45x34 42.39x10 9-14 43.10x19 25-30 44.19-14 30-34 45.14- 9 34-40

46. 9- 4 7-11 47. 4x27 11-16

E. Holstvoogd – T. Sijbrands 1973 (0-2)

1.32-28 18-23 2.33-29 23x32 3.37x28 20-25 4.41-37 17-21 5.37-32 15-20

6.39-33 19-24 7.44-39 21-26 8.50-44 26x37 9.42x31 14-19 10.46-41 10-14

11.41-37 11-17 12.47-42 6-11 13.28-23 19x28 14.32x23 5-10 15.31-26 16-21

16.38-32 11-16 17.42-38 21-27 18.32x21 16x27 19.48-42 1- 6 20.37-32 6-11

21.32x21 11-16 22.34-30 25x34 23.39x19 16x27 24.40-34 13x24 25.34-30 9-13

26.30x19 13x24 27.44-39 4- 9 28.45-40 27-32 29.38x27 17-22 30.27x18 24-30

31.35x13 8x28 32.33x22 12x45 33.43-38 45-50 34.38-33 50-45 35.42-38 45-23

36.36-31 23-41 37.26-21 41-36 38.31-27 7-12

T. van Bokhoven – T. Sijbrands 1977 (0-2)

1.32-28 18-23 2.33-29 23x32 3.37x28 20-25 4.39-33 15-20 5.41-37 19-24

6.46-41 14-19 7.37-32 17-21 8.41-37 21-26 9.44-39 16-21 10.50-44 10-14

11.31-27 11-16 12.29-23 5-10 13.34-29 7-11 14.40-34 12-17 15.27-22 8-12

16.37-31 26x37 17.32x41 3- 8 18.41-37 1- 7 19.38-32 13-18 20.22x13 9x18

21.43-38 21-27 22.32x21 17x26 23.45-40 16-21 24.49-43 8-13 25.37-32 2- 8

26.42-37 21-27 27.32x21 26x17 28.38-32 24-30 29.35x15 19-24 30.29x 9 18x27

31. 9x18 12x41

Highland-opening

A. Bajakin – N. Mogiljanski 1987 (0-2)

1.32-28 18-23 2.38-32 12-18 3.31-27 7-12 4.36-31 20-24 5.43-38 14-20

6.49-43 10-14 7.41-36 5-10 8.46-41 1- 7 9.34-29 23x34 10.40x29 20-25

11.29x20 15x24 12.27-22 18x27 13.31x22 16-21 14.45-40 21-26 15.40-34 17-21

16.36-31 11-16 17.31-27 12-18 18.44-40 18-23 19.50-45 24-30 20.35x24 19x30

21.28x19 14x23 22.34-29 23x34 23.40x29 7-11 24.41-36 10-14 25.36-31 14-19

26.47-41 19-24 27.29x20 25x14 28.33-29 13-19 29.39-34 30x39 30.43x34 11-17

31.22x11 6x17 32.41-36 2- 7 33.27-22 17x28 34.32x23 19x28 35.38-32 8-13

36.32x23 13-19 37.42-38 19x28 38.38-32 9-13 39.32x23 13-19 40.23-18 4- 9

41.34-30 14-20 42.18-13 19x 8 43.48-43 7-12 44.30-24 20-25 45.29-23 9-13

46.45-40 12-18 47.23x12 8x17 48.43-39 17-22 49.39-33 3- 9 50.33-29 22-28

51.40-34 9-14 52.24-20 13-19 53.20x 9 19-24 54.29x20 25x 3

97

F. de Koning – K. Thijssen 2010 (0-2)

1.33-28 18-23 2.39-33 12-18 3.44-39 7-12 4.31-27 20-24 5.37-31 14-20

6.41-37 10-14 7.34-29 23x34 8.40x29 20-25 9.29x20 15x24 10.49-44 5-10

11.44-40 10-15 12.40-34 1- 7 13.27-22 18x27 14.31x22 14-20 15.45-40 16-21

16.46-41 21-26 17.36-31 17-21 18.41-36 11-16 19.31-27 7-11 20.50-45 24-30

21.35x24 19x30 22.36-31 12-17 23.33-29 30-35 24.38-33 35x44 25.39x50 13-18

26.22x13 9x18 27.45-40 17-22 28.28x17 11x22 29.43-38 20-24 30.29x20 25x14

31.33-28 22x33 32.38x29 14-19 33.50-44 6-11 34.44-39 8-13 35.47-41 11-17

36.41-36 19-23 37.40-35 15-20 38.39-33 17-22 39.35-30 13-19 40.42-38 4- 9

41.48-43 9-14 42.30-25 19-24 43.43-39 24-30 44.29-24 20x40 45.25x45 23-28

46.32x12 21x34

1.32 – 28 17 – 22 x 22 Chogoliev-opening

H. Wiersma – W. Chogoliev 1976 (2-0)

1.32-28 17-22 2.28x17 11x22 3.37-32 12-17 4.41-37 6-11 5.46-41 8-12

6.32-28 16-21 7.31-26 21-27 8.35-30 2- 8 9.30-25 27-31 10.36x27 22x31

11.34-29 31-36 12.37-32 1- 6 13.40-34 19-23 14.28x19 14x23 15.25x14 10x19

16.45-40 5-10 17.29-24 19x30 18.34x25 10-14 19.39-34 13-19 20.50-45 17-21

21.26x17 11x22 22.44-39 8-13 23.34-29 23x34 24.39x30 6-11 25.32-28 11-17

26.40-34 3- 8 27.34-29 4-10 28.29-23 18x29 29.33x24 22x33 30.38x29 19-23

31.29x18 13x22 32.41-37 9-13 33.42-38 12-18 34.38-33 8-12 35.33-29 22-28

36.43-38 28-33 37.38-32 33-39 38.32-28 7-11 39.28-23 18-22 40.49-43 13-18

41.43x34 11-16 42.45-40 16-21 43.40-35 21-26 44.24-19 22-28 45.23x32 14x23

46.47-41 36x47 47.32-27 47x24 48.30x28 17-21 49.27x16 12-17 50.34-29 10-14

51.35-30 15-20 52.28-23 18-22 53.30-24

Chizhov-attack

A. Georgiev – A. Chizhov 2003 (2-0)

1.32-28 17-22 2.28x17 11x22 3.37-32 6-11 4.41-37 12-17 5.46-41 8-12

6.32-28 16-21 7.31-26 21-27 8.35-30 2- 8 9.30-25 1- 6 10.37-31 19-23

11.28x19 14x23 12.25x14 10x19 13.34-30 5-10 14.30-25 23-28 15.41-37 10-14

16.40-34 19-24 17.45-40 14-20 18.25x14 9x20 19.40-35 3- 9 20.34-30 18-23

21.30x19 23x14 22.35-30 13-19 23.30-25 19-24 24.50-45 9-13 25.45-40 13-19

26.40-34 4- 9 27.34-29 27-32 28.38x18 12x34 29.33x22 17x28 30.39x30 24x35

31.42-38 20-24 32.48-42 8-12 33.43-39 11-17 34.31-27 6-11 35.36-31 24-29

36.27-22 28-33 37.39x28 29-34 38.31-27 34-40 39.27-21 40-45 40.37-31 19-24

41.44-40 45x34 42.38-33 35-40 43.22-18 12x32 44.21x 1 32-37 45.49-43 37x28

46. 1- 6 24-29 47. 6x35 29-33 48.31-27 9-13 49.35x 2 33-38 50. 2-30 34-40

51.30-35 40-45 52.35-49 38-42 53.47x38 45-50 54.38-32 50-33 55.27-21 33- 6

56.32-27 6-33 57.21-16

98

1.32 – 28 17 – 22 x 21 Schwarzman manoeuvring opening

A. Shwarzman – A. Chizhov 2003 (0-2)

1.32-28 17-22 2.28x17 12x21 3.31-26 7-12 4.26x17 12x21 5.37-31 2- 7

6.31-27 21x32 7.38x27 11-17 8.43-38 19-23 9.49-43 17-21 10.36-31 21x32

11.38x27 23-28 12.33x22 16-21 13.27x16 18x36 14.41-37 14-19 15.39-33 10-14

16.46-41 19-23 17.37-32 14-19 18.41-37 13-18 19.32-27 5-10 20.37-32 10-14

21.44-39 9-13 22.43-38 4- 9 23.33-28 6-11 24.34-30 11-17 25.40-34 20-24

26.30-25 24-29 27.42-37 29x40 28.35x44 17-21 29.44-40 15-20 30.40-35 20-24

31.45-40 14-20 32.25x14 9x20 33.50-45 20-25 34.48-43 3- 9 35.39-33 24-30

36.35x24 19x30 37.28x19 13x24 38.33-28 18-23 39.28x19 24x13 40.43-39 8-12

41.37-31 12-18 42.40-34 18-23 43.31-26 23-28 44.26x17 28x37 45.38-32 37x28

46.34-29 30-35 47.29-24 1- 6 48.27-22 25-30 49.22x33 30x19 50.33-28 7-12

51.17x 8 13x 2 52.39-33 19-23

E. Prosman – A. Shwarzman 2004 (1-1)

1.32-28 17-22 2.28x17 12x21 3.35-30 20-25 4.40-35 15-20 5.45-40 20-24

6.33-29 24x33 7.39x28 11-17 8.44-39 18-22 9.49-44 22x33 10.39x28 13-18

11.44-39 18-22 12.38-33 14-20 13.42-38 20-24 14.50-45 7-12 15.37-32 10-14

16.41-37 24-29 17.33x13 22x44 18.40x49 9x18 19.32-28 1- 7 20.38-33 5-10

21.37-32 7-11 22.43-38 3- 9 23.49-43 9-13 24.30-24 18-23 25.28x19 14x23

26.31-27 21-26 27.47-42 4- 9 28.43-39 17-21 29.46-41 12-18 30.41-37 8-12

31.27-22 18x27 32.33-28 2- 8 33.28x19 9-14 34.39-33 14x23 35.33-28 11-17

36.28x19 17-22 37.48-43 12-17 38.36-31 27x36 39.32-27 21x41 40.42-37 41x32

41.38x 9 36-41 42. 9- 4 41-46 43. 4x15 46x 5 44.43-38 26-31 45.24-19 5x30

46.35x24 31-37 47.24-19 37-41 48.19-14 41-47 49.14-10 8-13 50.45-40 13-19

51.40-34 19-24 52.15x11 6x17 53.10- 5 17-21 54. 5-37 21-26 55.37-48 47-24

56.48-37 24-35 57.34-29 35-13 58.37-32 26-31 59.32-28 31-36 60.28-37 13- 8

61.37-28 8-30 62.28-32 30-13 63.32-37 13- 8 64.37-28 16-21 65.28-32 21-26

66.32-28 8-13 67.28-37 13-35 68.37-28 35-13 69.28-32 13- 2 70.32-28 2-13

71.28-32 13-22 72.29-24 22-33 73.24-19 33-22 74.19-14 22- 4 75.32-19 26-31

76.19-32 25-30 77.32-43 30-35 78.43-48 36-41 79.48x26 41-46

A. Shwarzman – A. Chizhov 1998 (1-1)

1.32-28 17-22 2.28x17 12x21 3.34-30 7-12 4.30-25 11-17 5.31-26 6-11

6.40-34 19-23 7.35-30 1- 6 8.45-40 13-19 9.40-35 9-13 10.44-40 4- 9

11.50-45 2- 7 12.37-31 18-22 13.31-27 22x31 14.26x37 17-22 15.33-29 12-18

16.39-33 7-12 17.37-31 21-27 18.31-26 11-17 19.49-44 23-28 20.44-39 19-24

21.30x19 14x23 22.25x14 9x20 23.29-24 20x29 24.33x24 10-14 25.38-33 17-21

26.26x17 12x21 27.42-38 8-12 28.35-30 14-20 29.30-25 20x29 30.33x24 13-19

31.24x13 18x 9 32.41-37 12-18 33.37-31 21-26 34.47-42 26x37 35.42x31 5-10

36.34-29 23x34 37.40x29 16-21 38.39-33 28x39 39.43x34 9-14 40.31-26 22-28

41.26x17 18-22 42.29-23 28x19 43.17x28 19-23 44.28x19 14x23 45.46-41 6-11

46.41-37 11-17 47.37-32 17-21 48.48-42 10-14 49.42-37 15-20 50.34-30 21-26

51.32x21 26x17 52.37-32 3- 8 53.38-33 8-13 54.45-40 17-21 55.40-34 13-19

56.34-29 23x34 57.30x39 19-23 58.33-28 23-29 59.28-22 20-24 60.22-18 14-20

61.25x14 24-30 62.14- 9 29-34 63.39-33 34-40 64. 9- 3 40-44 65. 3x26 30-34

66.32-28 44-49 67.26-48 34-40 68.48-39 49-21 69.18-13 21-26 70.33-29 26-17

99

1.32 – 28 18 – 22 The eagle

Mutual-outposts-variation

A. Gantwarg – H. Wiersma 1979 (1-1)

1.32-28 18-22 2.37-32 12-18 3.41-37 7-12 4.46-41 1- 7 5.34-29 19-23

6.28x19 14x34 7.40x29 10-14 8.35-30 20-25 9.30-24 5-10 10.44-40 14-20

11.50-44 9-14 12.32-28 16-21 13.31-26 11-16 14.37-32 21-27 15.32x21 16x27

16.38-32 27x38 17.43x32 14-19 18.40-35 19x30 19.35x24 17-21 20.26x17 22x11

21.42-38 10-14 22.44-40 18-22 23.28x17 11x22 24.41-37 4-10 25.49-44 3- 9

26.47-42 14-19 27.40-35 19x30 28.35x24 10-14 29.45-40 14-19 30.40-35 19x30

31.35x24 9-14 32.44-40 6-11 33.32-28 11-17 34.37-32 14-19 35.40-35 19x30

36.35x24 13-19 37.24x13 8x19 38.29-23 20-24 39.23x14 24-29 40.33x24 22x44

41.14- 9 44-50 42.24-19 25-30 43. 9- 4 17-21 44.19-14 30-35 45. 4-31 35-40

46.14- 9 40-45 47. 9- 4 50- 6 48.31-37 45-50 49.37-46 50-11 50.42-37 6- 1

51.37-31 11- 6 52.31-27 15-20 53.27x16 20-25 54. 4-31 7-11 55.16x18

Mutual outposts variation

L. Thijssen - B. Terwel 1996 (0-2)

1.34-29 17-22 2.32-28 11-17 3.37-32 6-11 4.41-37 1- 6 5.46-41 19-23

6.28x19 14x34 7.40x29 10-14 8.35-30 20-25 9.30-24 14-20 10.44-40 9-14

11.50-44 5-10 12.32-28 16-21 13.31-26 11-16 14.37-32 21-27 15.32x21 16x27

16.38-32 27x38 17.43x32 4- 9 18.42-38 22-27 19.32x21 25-30 20.24x35 18-23

21.29x18 12x34 22.21x 1 20-25 23.40x29 13-18 24. 1x23 25-30 25.35x24 15-20

26.24x13 8x50 27.41-37 2- 8 28.48-43 50-11 29.43-38 8-12 30.49-43 11- 7

31.45-40 6-11 32.40-35 12-18 33.35-30 11-17 34.29-24 3- 8 35.24-19 14x23

36.30-25 23-29 37.25-20 17-21 38.26x17 8-12 39.17x 8 29-33 40.38x29

The black rush

A. Gantwarg – V. Wirny 1983 (0-2)

1.32-28 18-22 2.37-32 12-18 3.41-37 7-12 4.46-41 1- 7 5.34-30 20-25

6.30-24 19x30 7.35x24 14-20 8.33-29 22x33 9.39x28 17-21 10.29-23 20x29

11.23x34 21-26 12.38-33 10-14 13.44-39 11-17 14.42-38 17-22 15.28x17 12x21

16.47-42 5-10 17.31-27 7-12 18.49-44 15-20 19.33-28 10-15 20.39-33 14-19

21.44-39 19-23 22.28x19 13x24 23.36-31 9-13 24.50-44 4- 9 25.41-36 2- 7

26.33-29 24x33 27.39x28 18-23 28.28x19 13x24 29.38-33 8-13 30.33-28 13-19

31.42-38 9-13 32.38-33 24-30 33.44-39 12-18 34.33-29 7-12 35.29-23 18x29

36.34x14 20x 9 37.40-34 13-19 38.43-38 9-13 39.45-40 3- 9 40.38-33 9-14

41.48-42 30-35 42.34-29 35x44 43.39x50 14-20 44.29-23 6-11 45.23x14 20x 9

46.33-29 15-20 47.42-38 20-24 48.29x20 25x14 49.38-33 14-19 50.50-44 12-18

51.44-39 19-24 52.28-22 18-23 53.39-34 13-19 54.22-17 21x12 55.27-22 11-17

56.22x11 16x 7 57.31-27 9-13 58.33-28 12-18 59.36-31 7-11 60.28-22 24-30

T. Sijbrands – J. de Jonge 1991 (2-0)

1.32-28 18-22 2.37-32 12-18 3.41-37 7-12 4.46-41 1- 7 5.34-30 20-25

6.30-24 19x30 7.35x24 14-20 8.33-29 22x33 9.39x28 18-22 10.38-33 10-14

11.42-38 16-21 12.31-26 11-16 13.44-39 14-19 14.40-35 19x30 15.35x24 7-11

16.39-34 9-14 17.43-39 14-19 18.28-23 19x28 19.32x23 13-19 20.23x14 20x 9

21.48-43 8-13 22.37-32 13-18 23.32-28 21-27 24.45-40 3- 8 25.40-35 9-13

26.28-23 4-10 27.50-44 13-19 28.23x14 10x30 29.35x24 2- 7 30.47-42 18-23

31.29x18 22x13 32.33-28 17-22 33.28x17 12x21 34.26x17 11x22 35.38-33 7-12

36.34-29 12-17 37.41-37 8-12 38.37-31 6-11 39.33-28 22x33 40.39x28 12-18

41.31x22 18x27 42.42-37 27-32 43.29-23 32x41 44.36x47 5-10 45.24-19 13x24

100

Roozenburg-variation

O. Mol – G. Jansen 1997 (2-0)

1.32-28 18-22 2.37-32 12-18 3.41-37 7-12 4.46-41 1- 7 5.31-26 19-23

6.28x19 14x23 7.32-28 23x32 8.37x28 16-21 9.41-37 21-27 10.37-31 20-24

11.47-41 10-14 12.41-37 11-16 13.37-32 5-10 14.32x21 16x27 15.34-29 7-11

16.29x20 15x24 17.40-34 13-19 18.45-40 9-13 19.34-30 3- 9 20.30-25 2- 7

21.40-34 10-15 22.34-30 18-23 23.50-45 23x32 24.33-29 24x33 25.39x37 19-23

26.37-32 11-16 27.32x21 16x27 28.30-24 6-11 29.44-39 12-18 30.39-34 8-12

31.34-30 23-28 32.24-19 14x23 33.38-32 27x47 34.30-24 47x20 35.25x 3 11-16

36.43-38 23-29 37. 3-14 28-33 38.35-30 33x42 39.48x37 29-33 40.45-40 7-11

41.40-35 16-21 42.30-24 11-16 43.14- 3 22-28 44.37-32 28x37 45.31x42 18-23

46. 3-25 21-27 47.25-48 33-38 48.42x33 23-29 49.26-21

Fork-lock-variation

A. Getmanski – I. Kostionov 2003 (2-0)

1.32-28 18-22 2.37-32 12-18 3.41-37 7-12 4.46-41 1- 7 5.31-26 20-25

6.36-31 14-20 7.41-36 10-14 8.47-41 5-10 9.32-27 19-23 10.28x19 14x23

11.34-30 25x34 12.40x29 23x34 13.39x30 20-25 14.44-39 25x34 15.39x30 10-14

16.30-25 14-19 17.35-30 19-23 18.49-44 9-14 19.44-40 4-10 20.40-35 14-19

21.33-29 23x34 22.30x39 10-14 23.39-33 19-23 24.35-30 14-20 25.25x14 13-19

26.14-10 15x 4 27.37-32 3- 9 28.41-37 9-14 29.43-39 4-10 30.45-40 10-15

31.39-34 8-13 32.40-35 23-28 33.32x23 19x39 34.34x43 13-19 35.38-33 19-23

36.43-39 15-20 37.42-38 23-28 38.30-25 20-24 39.37-32 28x37 40.31x42 22x31

41.26x37 18-23 42.39-34 2- 8 43.34-30 14-19 44.33-29 23x34 45.30x39 8-13

46.39-34 19-23 47.38-33 12-18 48.33-29 24x33 49.25-20 17-22 50.20-15 23-28

51.15-10 22-27 52.10- 4 11-17 53.34-29 33x24 54. 4-15

1.32 – 28 17 – 21 The hedgehog

F. Teer – A. Shwarzman 1999 (0-2)

1.32-28 17-21 2.33-29 21-26 3.39-33 16-21 4.44-39 11-16 5.50-44 6-11

6.38-32 21-27 7.31x22 18x38 8.43x32 16-21 9.42-38 20-25 10.47-42 15-20

11.49-43 11-16 12.37-31 26x37 13.42x31 21-26 14.32-27 26x37 15.41x32 19-24

16.46-41 14-19 17.41-37 10-14 18.48-42 5-10 19.36-31 7-11 20.31-26 2- 7

21.27-22 12-17 22.29-23 8-12 23.34-30 25x34 24.39x30 10-15 25.44-39 16-21

26.30-25 4-10 27.22-18 13x22 28.40-34 11-16 29.45-40 3- 8 30.34-29 7-11

31.40-34 21-27 32.32x21 16x27 33.34-30 11-16 34.23-18 12x41 35.42-37 41x32

36.29-23 19x28 37.30x19 14x23 38.25x21 23-29 39.33x24 1- 7 40.35-30 7-12

41.30-25 12-18 42.39-34 27-31 43.38x36 16x27 44.43-38 10-14 45.34-29 18-23

46.29x18 22x13

Y. Lagoda – A. Shwarzman 2007 (0-2)

1.32-28 16-21 2.34-29 21-26 3.40-34 17-21 4.45-40 11-16 5.50-45 6-11

6.37-32 26x37 7.42x31 21-26 8.47-42 26x37 9.42x31 1- 6 10.48-42 16-21

11.31-26 20-24 12.26x17 12x21 13.29x20 15x24 14.41-37 7-12 15.46-41 10-15

16.36-31 21-26 17.41-36 11-16 18.34-29 5-10 19.29x20 15x24 20.40-34 10-15

21.44-40 4-10 22.49-44 6-11 23.34-29 11-17 24.29x20 15x24 25.40-34 10-15

26.34-29 17-21 27.29x20 15x24 28.45-40 18-23 29.40-34 12-18 30.31-27 8-12

31.34-30 12-17 32.30-25 2- 8 33.44-40 14-20 34.25x14 9x20 35.40-34 3- 9

36.34-30 20-25 37.28-22 17x28 38.33x22 25x34 39.39x30 23-29 40.30-25 18-23

41.43-39 9-14 42.39-34 29x40 43.35x44 23-29 44.22-17 21x12 45.32-28 29-34

46.37-32 24-30 47.27-22 12-18 48.22-17 16-21 49.32-27 21x43 50.17-11 34-39

101

1.32 – 28 16 – 21 The black panther

T. Gerritsen – A. Domchev 2010 (2-0)

1.32-28 16-21 2.31-26 18-22 3.37-32 11-16 4.41-37 7-11 5.34-29 1- 7

6.40-34 13-18 7.45-40 19-23 8.28x19 14x23 9.46-41 21-27 10.32x21 16x27

11.29-24 20x29 12.33x24 9-13 13.34-30 13-19 14.24x13 8x19 15.38-33 4- 9

16.37-31 9-13 17.42-38 10-14 18.40-34 14-20 19.30-25 3- 8 20.25x14 19x10

21.35-30 15-20 22.30-25 10-14 23.34-30 14-19 24.25x14 19x10 25.50-45 10-14

26.30-25 23-28 27.41-37 11-16 28.37-32 28x37 29.31x42 13-19 30.44-40 5-10

31.39-34 18-23 32.34-30 12-18 33.40-34 7-12 34.45-40 10-15 35.33-29 14-20

36.25x14 19x10 37.30-25 10-14 38.40-35 8-13 39.43-39 13-19 40.35-30 2- 8

41.38-33 14-20 42.25x14 19x10 43.30-24 10-14 44.24-19 23-28 45.19x10 15x 4

46.48-43 8-13 47.34-30 6-11 48.30-25 4-10 49.25-20 10-14 50.20x 9 13x 4

51.29-24 18-23 52.42-37 27-32 53.37-31 23-29 54.24-20 29x38 55.20-15

R. Palmer – T. Sijbrands 1970 (0-2)

1.32-28 17-21 2.31-26 12-17 3.37-32 7-12 4.36-31 19-23 5.28x19 14x23

6.33-28 9-14 7.28x19 14x23 8.31-27 10-14 9.38-33 23-28 10.32x23 18x38

11.43x32 14-19 12.39-33 5-10 13.44-39 10-14 14.42-38 12-18 15.49-43 18-23

16.34-29 23x34 17.39x30 19-23 18.30-25 13-19 19.33-29 23x34 20.40x29 1- 7

21.41-37 7-12 22.47-42 12-18 23.46-41 8-13 24.41-36 4- 9 25.29-23 18x29

26.27-22 17x28 27.32x34 13-18 28.26x17 11x22 29.50-44 2- 8 30.44-39 8-12

31.39-33 6-11 32.34-29 9-13 33.29-24 20x29 34.33x24 19x30 35.35x24 16-21

36.45-40 21-27 37.40-34 18-23 38.43-39 12-18 39.39-33 23-28 40.33-29 14-19

41.34-30 19-23 42.48-43 23x34 43.30x39 11-17 44.37-31 3- 9 45.39-34 9-14

46.42-37 14-19 47.34-30 18-23 48.25-20 23-29 49.24x33 15x35

1.32 – 28 20 – 25 The Russian bear M. Korchow – A. Andreiko 1972 (0-2)

1.32-28 20-25 2.37-32 15-20 3.41-37 10-15 4.46-41 5-10 5.31-27 19-23

6.28x19 14x23 7.33-28 9-14 8.28x19 14x23 9.39-33 10-14 10.44-39 13-19

11.33-28 8-13 12.39-33 2- 8 13.49-44 4- 9 14.44-39 17-21 15.36-31 21-26

16.41-36 12-17 17.34-29 23x34 18.40x29 17-22 19.28x17 11x22 20.29-23 19x28

21.32x12 7x18 22.50-44 14-19 23.33-28 22x33 24.39x28 19-23 25.28x19 13x24

26.27-22 18x27 27.31x22 9-13 28.38-32 8-12 29.32-27 6-11 30.37-31 26x37

31.42x31 24-30 32.35x24 20x29 33.47-42 15-20 34.42-38 20-24 35.44-40 1- 6

36.38-32 11-17 37.22x11 6x17 38.40-34 29x40 39.45x34 17-21 40.31-26 12-17

41.43-39 13-18 42.48-43 3- 9 43.43-38 9-14 44.38-33 24-30 45.33-28 30-35

46.36-31 14-19 47.28-22 17x37 48.26x17 37x26 49.27-21 16x27 50.17-11 27-31

51.11- 7 31-37 52. 7- 1 18-22 53. 1- 6 22-27 54. 6-28 37-42 55.28x10 42-48

56.10-41 27-31 57.41-32 31-36 58.32-46 48-31 59.39-33 31-48 60.34-29 48-42

D. Droezjinin – H. Wiersma 2002 (1-1)

1.32-28 20-25 2.37-32 15-20 3.41-37 10-15 4.46-41 5-10 5.31-27 19-23

6.28x19 14x23 7.33-28 9-14 8.28x19 14x23 9.39-33 10-14 10.44-39 13-19

11.49-44 17-21 12.36-31 21-26 13.41-36 4- 9 14.33-28 8-13 15.39-33 2- 8

16.47-41 23-29 17.34x23 18x29 18.33x24 20x29 19.44-39 14-20 20.50-44 9-14

21.35-30 25x34 22.39x30 3- 9 23.40-35 20-24 24.44-39 29-34 25.30-25 24-30

26.35x24 19x30 27.39-33 30-35 28.43-39 34x43 29.48x39 13-19 30.27-22 8-13

31.31-27 19-24 32.36-31 12-18 33.41-36 7-12 34.45-40 35x44 35.39x50 14-19

36.50-45 9-14 37.45-40 15-20 38.40-34 24-30

102

The cow

R. Clerc – A. Chizhov 2001 (1-1)

1.32-28 20-24 2.34-30 14-20 3.30-25 10-14 4.37-32 18-23 5.42-37 4-10

6.28-22 17x28 7.33x22 12-18 8.47-42 18x27 9.31x22 8-12 10.37-31 12-18

11.32-27 7-12 12.41-37 24-30 13.35x24 20x29 14.31-26 14-20 15.25x14 9x20

16.27-21 16x27 17.22x31 10-14 18.31-27 5-10 19.39-34 11-17 20.44-39 20-25

21.37-32 15-20 22.27-21 10-15 23.21-16 1- 7 24.32-27 3- 8 25.27-21 18-22

26.46-41 13-18 27.41-37 8-13 28.37-31 22-28 29.31-27 7-11 30.16x 7 2x11

31.21-16 20-24 32.16x 7 12x 1 33.27-21 17-22 34.42-37 6-11 35.38-32 29-33

36.40-35 33x44 37.50x39 22-27 38.21-17 27x38 39.17x 6 28-33 40.39x28 23x41

41.36x47 18-22 42.43x32 24-30 43.35x24 19x39 44.47-41 25-30 45.41-36 15-20

46.32-27 22x31 47.36x27 20-24 48.26-21 30-35 49.45-40 35x44 50.49x40 24-29

51.21-17 29-34 52.40x29 39-44 53.29-24

1.33 – 29

A. Getmanski – A. Baliakin 2011 (1-1)

1.33-29 19-23 2.35-30 20-25 3.40-35 14-20 4.44-40 10-14 5.38-33 14-19

6.30-24 19x30 7.35x24 17-22 8.42-38 11-17 9.32-28 23x32 10.37x28 16-21

11.41-37 21-27 12.46-41 6-11 13.50-44 11-16 14.48-42 7-11 15.31-26 27-31

16.36x27 22x31 17.37-32 31-36 18.41-37 9-14 19.28-23 1- 6 20.40-35 4-10

21.44-40 17-22 22.32-28 11-17 23.34-30 25x34 24.39x30 22-27 25.37-32 6-11

26.32x21 16x27 27.38-32 27x38 28.43x32 11-16 29.49-43 18-22 30.32-27 22x31

31.26x37 16-21 32.43-39 21-26 33.40-34 17-21 34.42-38 21-27 35.37-32 26-31

36.32x21 12-18 37.23x12 8x26 38.38-32 13-18 39.30-25 2- 8 40.45-40 8-12

41.32-27 31x22 42.28x 8 3x12 43.33-28 12-17 44.28-23 18-22 45.35-30 26-31

46.23-19 14x23 47.29x27 20x29 48.34x23 31x22 49.30-24 17-21 50.25-20 22-27

51.23-19 27-32 52.19-13 32-37 53.13- 8 37-41 54. 8- 3 21-26 55.40-35 41-46

56.35-30 46-32 57.20-14 10x19 58.24x13 32-16 59.39-34 26-31 60.13- 9 31-37

61. 9- 4 37-41 62.30-24 41-46 63.34-30 46-37 64. 3-26 37-14 65. 4-13 16-27

66.13x31 36x27 67.30-25 5-10 68.26-12 14- 3 69.12-40

Keller-opening

V. Wirny – H. Wiersma 1984 (2-0)

1.33-29 17-22 2.39-33 11-17 3.44-39 6-11 4.50-44 1- 6 5.31-26 16-21

6.32-28 19-23 7.28x19 14x23 8.35-30 10-14 9.30-24 23-28 10.40-35 20-25

11.24-20 15x24 12.29x20 14-19 13.20-15 11-16 14.44-40 5-10 15.34-30 25x34

16.40x29 19-23 17.29-24 9-14 18.33-29 23x34 19.39x30 14-19 20.30-25 19x30

21.25x34 21-27 22.37-31 10-14 23.43-39 13-19 24.35-30 19-23 25.38-33 8-13

26.45-40 2- 8 27.40-35 17-21 28.26x17 12x21 29.33-29 7-12 30.30-25 21-26

31.29-24 26x37 32.41x21 16x27 33.34-30 14-19 34.25-20 12-17 35.30-25 19x30

36.25x34 3- 9 37.42-37 6-11 38.47-41 11-16 39.49-43 17-21 40.37-31 21-26

41.41-37 27-32 42.35-30 32x41 43.46x37 8-12 44.43-38 16-21 45.30-24 21-27

46.34-30 23-29 47.24x33 18-23 48.39-34 28x39 49.34x43 23-28 50.30-24 12-17

51.37-32 28x37 52.31x42 22-28 53.42-37 17-22 54.48-42 28-33 55.38x29 22-28

56.42-38

103

Krajenbrink-attack

A. Gantwarg – T. Sijbrands 1989 (1-1)

1.33-29 16-21 2.31-26 11-16 3.37-31 6-11 4.31-27 18-22 5.27x18 13x22

6.41-37 9-13 7.39-33 13-18 8.44-39 19-23 9.50-44 21-27 10.32x21 16x27

11.35-30 8-13 12.30-25 4- 9 13.37-31 14-19 14.25x14 9x20 15.29-24 19x30

16.34x14 10x19 17.40-34 5-10 18.44-40 10-14 19.34-30 14-20 20.30-25 3- 8

21.25x14 19x10 22.40-34 10-14 23.45-40 13-19 24.40-35 23-28 25.42-37 18-23

26.37-32 28x37 27.31x42 12-18 28.34-30 7-12 29.39-34 1- 7 30.30-25 23-28

31.43-39 18-23 32.46-41 12-18 33.49-43 7-12 34.41-37 8-13 35.34-29 23x34

36.39x30 28x39 37.43x34 19-23 38.30-24 13-19 39.24x13 18x 9 40.35-30 9-13

41.38-32 27x38 42.42x33 22-27 43.34-29 23x34 44.30x39 12-18 45.33-29 13-19

46.48-42 19-23 47.39-34 17-22 48.37-32 27x38 49.42x33 15-20 50.34-30 23x34

51.30x39 22-27 52.33-29 11-17 53.39-33 17-22 54.36-31 27x36 55.26-21 2- 7

56.21-16 22-27 57.33-28 27-31 58.47-41

The buffalo

A. Gantwarg - A. Valiuk 1995 (0-2)

1.33-29 18-22 2.31-26 20-24 3.29x20 15x24 4.34-30 22-28 5.32x23 19x28

6.30x19 14x23 7.36-31 10-14 8.41-36 5-10 9.38-32 14-20 10.46-41 12-18

11.42-38 7-12 12.32-27 17-22 13.38-32 20-24 14.47-42 1- 7 15.42-38 9-14

16.38-33 13-19 17.43-38 8-13 18.49-43 4- 9 19.48-42 11-17 20.40-34 6-11

21.44-40 10-15 22.27-21 16x27 23.32x21 14-20 24.31-27 22x31 25.36x27 24-29

26.33x22 17x28 27.21-16 20-24 28.37-31 15-20 29.42-37 11-17 30.27-21 18-22

31.34-30 13-18 32.30-25 29-33 33.38x29 24x44 34.25x14 9x20 35.40x49 20-24

36.41-36 3- 9 37.45-40 7-11 38.16x 7 2x11 39.21-16 9-14 40.16x 7 12x 1

41.43-38 14-20 42.40-34 1- 7 43.49-43 7-11 44.38-32 28-33 45.43-38 33x42

46.37x48 22-28 47.48-43 28x37 48.31x42 11-16 49.42-37 16-21 50.37-32 18-22

51.36-31 22-28 52.50-44 28x37 53.31x42 21-27 54.44-39 23-28 55.43-38 28-32

56.38-33 20-25 57.42-38 32x43 58.39x48 27-32 59.48-42 19-23 60.35-30 24x35

61.33-28 32-38 62.28x19 38x47 63.19-13 47-41 64.34-30 25x34

A. Baliakin – M. Korenevski 1989 (2-0)

1.33-29 18-22 2.31-26 20-24 3.29x20 15x24 4.34-30 13-18 5.36-31 18-23

6.32-27 12-18 7.37-32 7-12 8.41-37 8-13 9.40-34 1- 7 10.45-40 2- 8

11.46-41 14-20 12.30-25 10-15 13.25x14 9x20 14.34-30 20-25 15.50-45 25x34

16.40x20 15x24 17.39-34 5-10 18.43-39 10-14 19.48-43 4-10 20.34-30 14-20

21.44-40 3- 9 22.30-25 9-14 23.40-34 24-29 24.34-30 20-24 25.39-33 16-21

26.27x16 22-28 27.33x22 18x36 28.45-40 13-18 29.43-39 18-22 30.37-31 36x27

31.32x21 10-15 32.49-43 15-20 33.41-36 23-28 34.39-34 29-33 35.38x29 24x33

36.43-38 8-13 37.38x29 28-32 38.47-41 22-28 39.41-37 32x41 40.36x47 28-32

41.30-24 19x39 42.40-34 39x30 43.35x15 13-18 44.47-41 18-22 45.41-36 22-28

46.42-37 32x41 47.36x47 28-32 48.47-42

104

1.33 – 28 Sijbrands opening

Old Dutch

A. Kuyken – V. Agafonow 1969 (2-0)

1.33-28 18-23 2.39-33 12-18 3.31-27 7-12 4.44-39 20-24 5.37-31 14-20

6.41-37 2- 7 7.27-22 18x27 8.31x22 10-14 9.34-30 16-21 10.30-25 4-10

11.49-44 21-26 12.47-41 24-29 13.33x24 20x29 14.39-33 14-20 15.33x24 20x29

16.44-39 10-14 17.50-44 5-10 18.35-30 17-21 19.40-35 12-18 20.39-33 18x27

21.33x24 7-12 22.28-22 27x18 23.32-28 23x32 24.38x 7

Modern play

C. Pippel – A. Mathijsen 2001 (0-2)

1.33-28 18-22 2.38-33 12-18 3.34-29 7-12 4.40-34 20-25 5.42-38 1- 7

6.47-42 14-20 7.45-40 9-14 8.31-26 16-21 9.37-31 11-16 10.41-37 4- 9

11.46-41 7-11 12.50-45 2- 7 13.29-24 20x29 14.34x23 18x29 15.33x24 22x33

16.38x29 19x30 17.35x24 14-19 18.40-35 19x30 19.35x24 10-14 20.44-40 14-19

21.40-35 19x30 22.35x24 5-10 23.49-44 10-14 24.45-40 14-19 25.40-35 19x30

26.35x24 9-14 27.44-40 14-19 28.40-35 19x30 29.35x24 3- 9 30.39-33 21-27

31.31x22 17x39 32.43x34 16-21 33.26x17 11x22 34.42-38 9-14 35.36-31 14-19

36.34-30 25x23 37.32-27 19x30 38.27x 9 8-13 39. 9x29 15-20 40.29-23 20-24

41.38-33 30-35 42.33-29 24x33 43.23-19 35-40 44.19-14 40-44 45.14-10 44-49

46.10- 4 33-39 47. 4-15 39-44 48.41-36 44-50

The seagull

G. Valneris – A. Chizhov 1991 (0-2)

1.33-28 17-21 2.39-33 21-26 3.31-27 11-17 4.44-39 17-22 5.28x17 12x21

6.33-28 7-12 7.38-33 6-11 8.50-44 1- 6 9.42-38 19-23 10.28x19 14x23

11.47-42 9-14 12.35-30 20-25 13.40-35 4- 9 14.33-29 12-17 15.38-33 14-20

16.33-28 2- 7 17.28x19 13x33 18.39x28 17-22 19.28x17 11x31 20.36x27 7-11

21.44-40 8-12 22.43-38 10-14 23.38-33 14-19 24.33-28 5-10 25.49-43 9-13

26.28-23 19x28 27.32x23 21x32 28.37x28 18x29 29.34x23 25x34 30.40x29 10-14

31.45-40 13-19 32.43-39 16-21 33.42-38 26-31 34.38-33 31-36 35.41-37 21-26

36.48-42 3- 9 37.37-32 11-17 38.40-34 26-31 39.32-27 31x22 40.42-38 9-13

41.34-30 36-41 42.46x37 12-18 43.23x21 20-25 44.28x17 25x41 45.21-16 41-47

1.34 – 29 Fork-lock-opening

A. Georgiev – T. Sijbrands 1999 (0-2)

1.34-29 20-25 2.40-34 15-20 3.45-40 10-15 4.32-28 17-21 5.31-26 19-24

6.26x17 11x22 7.28x17 12x21 8.37-32 21-26 9.32-28 18-22 10.28x17 16-21

11.38-32 21x12 12.32-28 13-18 13.36-31 26x37 14.41x32 9-13 15.50-45 18-22

16.28x17 12x21 17.42-37 4- 9 18.46-41 21-26 19.32-28 5-10 20.37-32 14-19

21.41-37 10-14 22.43-38 8-12 23.49-43 6-11 24.37-31 26x37 25.32x41 11-17

26.41-37 7-11 27.48-42 17-21 28.38-32 2- 8 29.47-41 21-26 30.42-38 12-18

31.41-36 1- 6 32.36-31 11-16 33.32-27 6-11 34.35-30 24x35 35.29-23 18x29

36.34x23 13-18 37.23x12 8x17 38.40-34 17-21 39.27-22 3- 8 40.37-32 26x37

41.32x41 11-17 42.22x11 16x 7 43.41-37 8-12 44.38-32 9-13 45.43-38 13-18

46.44-40 35x44 47.39x50 18-23 48.37-31 21-26 49.31-27 20-24 50.45-40 24-30

51.40-35 30x39 52.33x44 15-20 53.44-39 20-24 54.50-45 14-20 55.45-40 7-11

56.39-33 23-29 57.40-34 29x40 58.35x44 25-30 59.28-22 20-25

105

A. Dibman – J. Stokkel 1983 (2-0)

1.33-29 19-23 2.39-33 14-19 3.44-39 10-14 4.50-44 5-10 5.31-26 20-25

6.37-31 14-20 7.41-37 10-14 8.46-41 4-10 9.32-28 23x32 10.37x28 19-23

11.28x19 13x24 12.41-37 8-13 13.37-32 14-19 14.42-37 2- 8 15.47-41 17-22

16.32-28 10-14 17.28x17 12x21 18.26x17 11x22 19.38-32 8-12 20.33-28 22x33

21.29x38 6-11 22.31-26 11-17 23.32-27 1- 6 24.37-31 7-11 25.48-42 3- 8

26.42-37 17-21 27.26x17 12x32 28.38x27 8-12 29.31-26 12-17 30.37-31 18-23

31.41-37 24-29 32.34-30 25x34 33.39x30 29-33 34.43-38 33x42 35.37x48 20-24

36.40-34 24-29 37.44-39 29x40 38.45x34 14-20 39.30-25 20-24 40.34-30 9-14

41.49-43 23-29 42.43-38 29-34 43.38-33 34x43 44.48x39 13-18 45.27-21 16x27

46.31x13 19x 8 47.30x10 15x 4 48.25-20 17-21 49.26x17 11x22 50.20-14 6-11

51.35-30 11-17 52.30-24 22-27 53.33-28 17-22 54.28x17 27-32 55.36-31 32-38

56.39-33 38x 9

The peacock

W. Vrijland – W. van der Wijk 2000 (1-1)

1.34-29 17-22 2.40-34 11-17 3.32-28 6-11 4.37-32 19-23 5.28x19 14x23

6.41-37 10-14 7.35-30 20-25 8.45-40 5-10 9.46-41 1- 6 10.50-45 14-19

11.40-35 9-14 12.44-40 3- 9 13.31-27 22x31 14.36x27 23-28 15.33x22 17x28

16.32x23 19x28 17.38-32 13-19 18.32x23 19x28 19.42-38 9-13 20.30-24 11-17

21.38-32 17-22 22.32x23 22x42 23.47x38 14-20 24.38-33 6-11 25.49-44 18-22

26.34-30 25x34 27.39x30 20-25 28.43-38 25x34 29.24-19 13x24 30.29x20 15x24

31.40x20 11-17 32.35-30 8-13 33.30-24 7-11 34.23-19 12-18 35.19x 8 2x13

36.33-29 13-19 37.24x13 18x 9 38.44-39 10-14 39.20-15 22-28 40.41-37 9-13

41.29-24 16-21 42.24-20 14x25 43.38-32 11-16 44.32x23 21-27 45.45-40 16-21

46.40-35 13-18 47.23x12 17x 8 48.39-33 8-13 49.33-29 13-18 50.29-24 18-23

51.48-43 21-26 52.43-38

1.34 – 30 French opening

The cheetah

F. Andriessen – R. Boomstra 2007 (0-2)

1.34-29 20-25 2.29-24 19x30 3.35x24 18-22 4.33-29 14-20 5.38-33 10-14

6.32-28 16-21 7.37-32 11-16 8.43-38 6-11 9.31-27 22x31 10.36x27 21-26

11.41-36 4-10 12.47-41 26-31 13.27-21 16x27 14.32x21 17x26 15.36x27 14-19

16.40-35 19x30 17.35x24 9-14 18.44-40 14-19 19.40-35 19x30 20.35x24 10-14

21.28-23 13-19 22.24x13 8x28 23.33x22 14-19 24.41-37 3- 8 25.37-32 8-13

26.46-41 12-18 27.32-28 7-12 28.39-34 2- 8 29.45-40 20-24 30.29x20 15x24

31.41-37 18-23 32.37-32 12-18 33.49-43 8-12 34.50-45 5-10 35.34-29 24x33

36.38x29 23x34 37.40x29 26-31

A. Gantwarg – H. Wiersma 1979 (1-1)

1.34-30 20-25 2.30-24 19x30 3.35x24 18-22 4.33-29 14-20 5.38-33 10-14

6.42-38 16-21 7.31-26 11-16 8.37-31 21-27 9.32x21 16x27 10.41-37 6-11

11.37-32 11-16 12.32x21 16x27 13.46-41 14-19 14.41-37 19x30 15.40-34 13-18

16.37-32 9-13 17.32x21 30-35 18.21-16 13-19 19.38-32 5-10 20.32-28 10-14

21.43-38 4-10 22.28-23 19x28 23.31-27 22x31 24.33x13 8x19 25.26x37 12-18

26.39-33 19-23 27.38-32 14-19 28.33-28 20-24 29.29x20 15x24 30.34-30 25x34

31.44-40 35x44 32.49x20 10-15 33.20-14 19x10 34.28x19 2- 8 35.47-42 3- 9

36.42-38 9-13 37.38-33 13x24 38.48-43 10-14 39.36-31 14-19 40.43-39 15-20

41.31-27 17-21 42.45-40 8-12 43.37-31 12-17 44.31-26 19-23 45.16-11 17x 6

46.26x17 7-11 47.17-12 18x 7 48.40-34 11-17 49.50-44 7-12 50.33-29 24x33

51.39x19 12-18 52.32-28 6-11 53.44-40 18-23 54.19-13 23x21 55.13- 9 21-27

106

Ottink-variation

T. Sijbrands – V. Doumesh 2007 (2-0)

1.34-30 17-22 2.31-26 11-17 3.30-25 6-11 4.37-31 1- 6 5.32-27 19-23

6.33-29 23x34 7.40x29 13-19 8.41-37 9-13 9.37-32 4- 9 10.44-40 20-24

11.29x20 15x24 12.46-41 19-23 13.41-37 14-20 14.25x14 10x19 15.40-34 9-14

16.34-30 5-10 17.45-40 10-15 18.39-34 14-20 19.50-45 20-25 20.38-33 3- 9

21.42-38 15-20 22.47-42 9-14 23.33-29 24x33 24.38x29 22-28 25.49-44 28-33

26.29x38 20-24 27.27-21 16x27 28.32x21 11-16 29.38-33 16x27 30.31x11 6x17

31.34-29 25x34 32.29x 9 13x 4 33.40x29 23x34 34.44-39

1.31 – 27 Polish opening

Semi-classical opening

E. Hoogendoorn - W. van der Kooij 1997 (2-0)

1.31-27 19-23 2.33-28 17-21 3.28x19 14x23 4.39-33 10-14 5.44-39 21-26

6.34-30 14-19 7.30-25 11-17 8.25x14 9x20 9.35-30 5-10 10.30-25 10-14

11.40-34 4- 9 12.45-40 20-24 13.50-45 14-20 14.25x14 9x20 15.40-35 3- 9

16.34-30 9-14 17.49-44 7-11 18.44-40 17-22 19.30-25 22x31 20.36x27 11-17

21.33-28 17-22 22.28x17 12x21 23.39-34 24-30 24.35x24 19x39 25.43x34 14-19

26.25x14 19x10 27.38-33 10-14 28.40-35 13-19 29.34-30 15-20 30.45-40 6-11

31.40-34 11-17 32.33-29 17-22 33.41-36 22x31 34.36x27 8-12 35.46-41 2- 8

36.48-43 20-25 37.43-39 12-17 38.29-24 8-13 39.39-33 1- 6 40.33-29 17-22

41.41-36 22x31 42.36x27 23-28 43.32x12 21x41 44.47x36 6-11 45.24-20 19-23

46.29x 9 14x 3 47.20-14

K. Thijssen - R. Cousijnsen 1996 (2-0)

1.31-27 19-23 2.33-28 17-21 3.28x19 14x23 4.39-33 10-14 5.34-30 14-19

6.30-25 21-26 7.25x14 9x20 8.35-30 5-10 9.44-39 10-14 10.30-25 4- 9

11.40-34 11-17 12.45-40 17-21 13.50-45 7-11 14.34-30 20-24 15.40-35 12-17

16.49-44 23-29 17.44-40 18-23 18.27-22 17x28 19.33x22 11-17 20.22x11 6x17

21.39-34 17-22 22.32-27 21x32 23.37x17 16-21 24.17-11 1- 6 25.38-32 6x17

26.32-28 23x32 27.34x23 19x28 28.30x10 15x 4 29.42-37 21-27 30.47-42 17-22

31.43-39 26-31 32.37x26 8-12 33.40-34 12-17 34.35-30 13-18 35.30-24 2- 8

36.45-40 9-14 37.40-35 8-13 38.48-43 3- 9 39.34-29 4-10 40.42-38 10-15

41.38-33 14-19 42.25-20 19x30 43.35x24 17-21 44.26x17 22x11 45.33x31 13-19

46.24x 4 15x44 47. 4x50

H. Wiersma – J. Van der Wal 1979

1.31-27 19-23 2.33-28 17-21 3.28x19 14x23 4.38-33 21-26 5.34-30 10-14

6.30-25 14-19 7.25x14 9x20 8.35-30 5-10 9.43-38 10-14 10.49-43 4- 9

11.40-35 11-17 12.45-40 7-11 13.39-34 20-25 14.44-39 14-20 15.33-29 9-14

16.50-45 1- 7 17.38-33 3- 9 18.42-38 17-22 19.47-42 22x31 20.36x27 20-24

21.29x20 15x24 22.33-28 11-17 23.39-33 14-20 24.41-36 17-22 25.28x17 12x21

26.33-29 24x33 27.38x29 20-24 28.29x20 25x14 29.43-39 8-12 30.30-24 19x30

31.34x25 23-28 32.32x23 21x41 33.36x47 18x29 34.42-38 13-19 35.39-33 9-13

36.33x24 19x30 37.35x24 12-18 38.40-34 7-12 39.34-30 6-11 40.24-20 2- 8

41.20x 9 13x 4 42.25-20 8-13 43.30-24 11-17 44.20-14 17-22 45.14- 9 22-27

46.38-33 12-17 47.33-28 18-22 48. 9x18 22x13 49.28-23 27-32 50.23-19 13-18

51.24-20 26-31 52.19-14 31-37 53.47-42 17-21 54.42x31 21-26 55.31-27 32x21

56.20-15 21-27 57.14-10 26-31 58.10- 5 18-22 59.45-40 31-36 60. 5-14 16-21

61.14-20 22-28 62.40-34 27-32 63.46-41 36x47

107

The big leap

E. Prosman – A. Droog 1996 (2-0)

1.31-27 17-22 2.36-31 16-21 3.27x16 22-28 4.32x23 19x28 5.33x22 18x36

6.37-32 14-19 7.41-37 10-14 8.39-33 12-18 9.44-39 20-24 10.34-30 18-23

11.40-34 14-20 12.46-41 24-29 13.33x24 20x40 14.45x34 11-17 15.38-33 7-11

16.16x 7 1x12 17.42-38 5-10 18.30-25 10-14 19.34-29 23x34 20.39x30 19-23

21.50-44 14-20 22.25x14 9x20 23.44-39 4- 9 24.49-44 6-11 25.44-40 12-18

26.40-34 13-19 27.30-25 8-12 28.25x14 9x20 29.34-29 23x34 30.39x30 3- 9

31.43-39 2- 8 32.32-28 8-13 33.33-29 17-21 34.28-23 19x28 35.47-42 36x47

36.38-33 47x38 37.33x22 18x27 38.39-34 38x24 39.30x 6

1.31 – 26 The edge-opening

G. Valneris – A. Chizhov 2001 (1-1)

1.31-26 19-23 2.36-31 14-19 3.41-36 10-14 4.46-41 5-10 5.31-27 20-24

6.36-31 15-20 7.33-28 10-15 8.41-36 4-10 9.47-41 17-21 10.26x17 11x33

11.39x28 23-29 12.34x23 18x29 13.27-21 16x27 14.31x22 6-11 15.36-31 11-16

16.41-36 12-17 17.22x11 29-34 18.40x29 24x22 19.11- 6 19-24 20.32-27 8-12

21.27x18 12x23 22.31-26 20-25 23.37-31 14-20 24.44-39 10-14 25.42-37 3- 8

26.31-27 14-19 27.45-40 9-14 28.37-32 24-30 29.35x24 19x30 30.39-33 13-19

31.33-28 30-35 32.40-34 20-24 33.38-33 8-13 34.36-31 7-12 35.26-21 2- 8

36.50-45 13-18 37.43-39 23-29 38.34x23 18x38 39.32x43 24-30 40.39-33 14-20

41.45-40 35x44 42.49x40 30-35 43.43-39 35x44 44.39x50 25-30 45.28-22 30-34

46.31-26 20-24 47.33-28 34-39 48.22-17 24-29 49.28-22 8-13 50.17x 8 13x 2

51.22-18 29-34 52.21-17 34-40 53.17-12 40-44 54.26-21 2- 7 55.12- 8 44-49

56.27-22 16x27 57.22x31 49-16 58.48-42 7-12 59. 8x17 39-43 60.42-38 43x32

61.18-12 32-38 62.31-27 16x32 63.12- 8 38-42 64. 8- 2 42-48 65. 2x35 32-16

66.35- 2

1.35 – 30 The wild horse

R. Clerc – A. Gantwarg 1985 (0-2)

1.35-30 20-25 2.40-35 15-20 3.45-40 20-24 4.33-29 24x33 5.38x29 18-22

6.30-24 19x30 7.35x24 14-19 8.40-35 19x30 9.35x24 10-14 10.24-20 14-19

11.20-15 12-18 12.39-33 7-12 13.44-39 9-14 14.42-38 5-10 15.47-42 1- 7

16.31-27 22x31 17.37x26 3- 9 18.41-37 19-23 19.46-41 14-19 20.37-31 10-14

21.31-27 19-24 22.29x20 23-28 23.32x23 18x40 24.50-45 14-19 25.45x34 25x14

26.36-31 12-18 27.41-36 7-12 28.34-30 2- 7 29.38-32 19-23 30.42-38 17-22

31.30-25 13-19 32.33-29 23x34 33.39x30 19-23 34.43-39 9-13 35.48-42 13-19

36.42-37 4-10 37.15x 4 14-20 38.25x14 19x10 39. 4x15 23-28 40.32x23 18x29

41.15x17 12x25 42.37-32 25-30 43.31-27 7-12 44.32-28 11-17 45.27-22 30-34

46.22x11 6x17 47.28-23 34-40

A. Cordier – T. Sijbrands 1999 (0-2)

1.35-30 20-25 2.40-35 15-20 3.45-40 20-24 4.33-29 24x33 5.38x29 10-15

6.50-45 5-10 7.42-38 16-21 8.47-42 21-26 9.39-33 15-20 10.44-39 19-24

11.30x19 13x24 12.49-44 9-13 13.35-30 24x35 14.29-23 18x29 15.33x15 12-18

16.32-28 17-22 17.28x17 11x22 18.31-27 22x31 19.36x27 14-19 20.34-29 3- 9

21.38-33 19-23 22.40-34 6-11 23.44-40 35x44 24.39x50 11-17 25.34-30 25x34

26.29x40 8-12 27.50-44 7-11 28.44-39 1- 7 29.42-38 2- 8 30.40-34 17-22

31.37-32 22x31 32.32-28 23x32 33.38x36 11-17 34.36-31 26x37 35.41x32 17-22

36.34-29 7-11 37.43-38 10-14 38.46-41 14-19 39.41-37 19-23 40.48-43 23x34