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Wiersma-Presman 1995
Alexander Presman (right) double-checks everything before executing the winning 55...36-41. Shortly afterward, his opponent Harm Wiersma extends his hand.
Photograph: Gennadi Shapiro

Wiersma-Presman 1995

Author: Alexander Presman
26-03-2025

Our second game was played in the Belarus-Netherlands match held in Minsk. The Dutch team was then on par with the Belarusian team. We had played a match in Rotterdam in 1994, and this was the return match. In the final round, I had to face Wiersma, and it turned into a very special game.

Actually, everything Wiersma did seemed strategically completely correct. I would say positionally flawless. Whereas what I did was absolutely not. But at the crucial moment, it seemed to work in my favor.

There was also a moment in the game where I had prepared a very nice draw combination for Wiersma’s most logical move. He didn’t see it and thought I would simply exchange two for two. But he didn’t see the beautiful combination.

Afterward, I felt that my victory was deserved. If you can calculate the position not once, but twice as well as perhaps the greatest calculation wizard in the draughts world, then you deserve the win.

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Harm Wiersma - Alexander Presman (05-07-1995)

1.32-2818-232.33-2923x323.37x2820-254.41-3712-185.29-2419x306.35x2414-19
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Perhaps today, I would choose 7-12 and 14-20, but in broad terms, it comes down to the same thing. 7.40-3519x308.35x2410-149.45-407-1210.38-331-711.46-4118-22
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You would think that players would play a common opening, with some theory behind it. In chess, this would very much be the case. But strangely, this position has never occurred again as of 2025 (at least according to Turbo Dambase). 12.42-3813-1813.34-29...13.37-32?15-20!14.24x1514-2015.15x2418-2316.28x1922-2717.31x2217x46-+13....16-2114.31-2611-1615.48-4214-2016.38-32...
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16....22-27!?An unorthodox move. But I still find it interesting. 17.50-4527x3818.43x329-13With the threat of 18-23, the response 19.28-23 is naturally prevented. 19.42-3818-22Perhaps the most remarkable thing in this game is that all the moves Wiersma makes are normal, i.e., the best positional moves. With all my experience, I can confidently say that today, I would play the same way with White. 20.40-347-1121.37-3121-2722.32x2116x2723.41-374-10
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24.45-40...24.28-23?13-19!24....11-1624...10-14?25.28-23!13-1826.37-3222-28?27.33x13!8x3728.31x22!17x2829.24-19!14x2330.29x1637-41*31.36-31!41-4632.47-41!46x4333.49x383-834.31-27!28-32*35.27-2232x4336.39x48and White has a decisive advantage. 25.47-42...The following possibility is beautiful: 25.28-2313-1826.47-426-1127.40-3510-1428.44-40?8-13!29.49-443-8!30.33-2822x3331.39x28
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31....18-22!32.38-3312-18!!33.23x3222-27!34.31x2213-1835.22x138x50-+
25....12-18!Another unorthodox move. I mentioned this position in the introduction. 26.37-32...Wiersma avoided 26.28-23due to the exchange 26....27-32I saw an interesting draw variation with an African king: 26...17-21
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27.26x2818-2228.28x1725-3029.34x1410x3030.31x2230-3431.39x3016-2132.17x2613-1833.22x138x50
27.23x2132x4128.36x4716x36, although it would have given him a considerable advantage.
26....8-1227.32x2116x2728.42-376-1129.40-35...
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White continues with the correct moves. Now, he is in time for 3-8 44-40, preventing the exchange 13-19. 29....3-830.44-40...Now, both players are heading toward the same position, but I foresaw what Tjalling Goedemoed called a "devilish combination". 30....10-1431.28-2311-1632.49-44...
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32....5-10A nasty, forced move. But a strong one. The following Black moves are prevented: 32...13-19?33.24x138x2834.29-24!20x2935.34x2116x2736.33-28!22x4237.31x1142x3138.36x27+-32...14-19?33.23x1420x934.24-19!13x2435.29x2015x2436.33-28!22x4237.31x442x3138.26x37+-33.37-32...After 33.33-2822x4234.31x1142x3135.36x2716x7
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36.39-33?is not possible because of 18-22!37.27x914x3, and Black breaks through.
33....16-21The comment for the previous move applies here as well. 33...13-1934.32x2119x3035.35x2416x2736.24-198-1337.19x82x1338.38-3227x3839.33x4213-1940.42-3819x2841.31-27!22x3142.26x37with great chances for succes. 34.32-28?...There are many tactical possibilities after 34.33-2822x4235.31x11After the game, Wiersma and I spent some time searching for the best continuation but concluded that neither side could win. At that time, we didn’t have computers, but both our conclusion and the variations we analyzed back then still hold up in the computer era:
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A)35....42-4736.26x1712x2137.23x32-838.3x2625-3039.34x2513-1940.24x1347x45=
B)35...25-3036.26x17!36.34x25?42-4837.26x1748x4630x3737.11-612x2138.29-2420x2939.34x314-1940.3x2642-4841.26x4248x45=
34....13-1935.24x138x1936.35-30...
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After 36.29-2419x3037.35x2418x2938.34x2320x1839.28-2318x2940.33x24, the compensation would be sufficient if White were a piece behind. But White is two pieces behind... Black wins after 40....12-1836....19-24!!Wiersma overlooked the black combination partly because he thought that 36...2-7was forced and he was occupied with calculating many beautiful variations. After the game, he showed the following among other things: 37.29-2418x2938.24x1320-247-1139.34x2325x3240.28x3722-2841.33x2217x842.26x6with a win. 39.30x1939.34x2325x3240.28x37, and despite gaining a piece, Black is in a dangerous position. 14x4340.34x2343x4541.44-4045x3442.33-2822x3343.31x2with a dangerous endgame for Black.
None of this is straightforward and acted as an unconscious distraction from the main line. Fortunately, I didn’t need it, as I recognized that one variation (the combination from the game) in time. That’s why 36...2-7 is not relevant.
37.30x1925-3038.34x2520-2439.29x918x2940.33x2422x4241.31x1142-4742.26x847x6
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And Wiersma resigned. If he had continued, Black would still have had to be cautious to avoid falling into the following trap: 43.40-346-28?43...2-8!44.34-296-11-+followed by 11-2 and a win. 44.19-1328-2245.13-82x1346.25-2015x2447.34-2924x3348.39x17...And it's not Black, but White who comes out on top.

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