Round 5 World Cup Ufa

Meurs - Schwarzman 2-0
Meurs - Schwarzman 2-0

After 42.38-33 Schwarzman played 20-25(?) This is not really wrong, but it seemed more logical to play   24-30, since then 43.37-31? is not possible due to 30-35! B+.   43.37-31! Note that a direct attack on piece 34 is not possible:   43.44-40? 24-30 44.40x29 17-22 45.28x17 12x21 46.26x17 18-23 47.29x18 8-12 48.17x8 2x42 B+   24-30! Schwarzman temporarily sacrifices a piece. 44.44-40 30-35 45.40x29 25-30? But after this big mistake the piece loss becomes permanent. The correct continuation was   2-7 46.28-23 25-30! 47.23-19 (and not   47.43-39? due to 16-21 48.27x16 30-34!) with a draw.   46.43-39! 2-7 47.45-40! 35x44 48.39x50 18-22 49.27x18 12x34 50.33-29 34x23 51.28x19 30-34 52.50-44 7-12 53.19-14 8-13 54.14-10 13-19 55.10-4 19-24 56.31-27 W+

Sjaibakov - Tolchikov 1-1
Sjaibakov - Tolchikov 1-1

After 7-11? Sjaibakov missed a great opportunity to strike with the piece sacrifice 40.32-28! 23x32 41.31-27! 32x21 42.26x8 13x2 43.43-39! and white will blow up the black left wing. Instead he played   40.43-39? and the game ended in a draw.

Tatarenko - Boomstra 0-2
Tatarenko - Boomstra 0-2

Tatarenko has a few inactive pieces on the right side of the board, and this was enough for Boomstra to win this game. 42.45-40 18-23! 43.40-34 13-18! 44.30-25 21-26 45.33-29 This is an exchange in the 'wrong' direction, but the alternative   45.34-30 17-21! 46.33-29 23x34 47.30x39 26-31! is hopeless for white.   24x33 46.38x29 26-31 47.35-30 17-22! 48.29-24? After this move the position is lost for white. The correct way to defend this position was   48.25-20 22-28 49.42-38 28x37 50.38-32 37x28 51.29-24.   22-27 49.24x22 27x47 50.22-17 31-37 51.17-12 37-41 52.12-8 41-46 53.8-2 23-28 54.2-16 47-15 55.16-49 28-33! 56.49-40 33-39! B+

Amrilloew - Bobkow 1-1
Amrilloew - Bobkow 1-1

The number 2 of the last world championship must have been startled when Bobkow replied his move 39.44-40? with 23-29!! Now 40.24-19 fails due to 11-16 41.33x24 16-21 42.27x16 18-23 43.19x28 22x35. But Amrilloew didn't lose his nerves, and managed to make a draw after   40.39-34 29x20 41.38-32 20-24 42.32-28! 24-29? This looks tempting, but it does not win. Black should have played   11-16! instead.   43.33x24 22x33 44.34-29 33-38 45.43x32 2-7 46.40-34 11-16 47.31-26 18-23 48.29x18 12x23 49.24-19!! 23x14 50.32-28 9-13 51.27-22 7-11 52.34-29 15-20 53.36-31 20-25 54.29-24 14-19 55.28-23 19x30 56.23-18 17x28 57.18x9 30-34 58.9-4 34-40 59.4-10 28-33 60.10-15 33-39 61.15-38 39-44 62.31-27 =

Vipulis - Kalmakov 0-2
Vipulis - Kalmakov 0-2

After 16-21! Vipulis became the victim of an opening trick of Kalmakov: 12.31-26? 18-22!! Now 13.50-44? is not possible due to 19-23! 14.28x10 13-19 15.25x23 22-28 16.33x22 17x46 17.26x17 46x5 B+ and also   13.42-37? does not help because of 21-27! 14.32x21 24-29 15.33x24 22x31 16.36x27 20x29 B+. And, as Pieter van der Vorm noted on the World Draughts Forum, after   13.40-34 black plays 24-29! (not   19-23? 14.28x30 14-19 15.25x23 22-28 16.33x22 17x46 17.26x17 46x5, since white can capture the black king with 18.34-29 11x22 19.29-23 5x44 20.50x39 =)   14.34x23 21-27 15.32x21 22-27 16.21x32 17-22 17.28x17 19x46 B+. So white sacrificed a piece with   13.41-37 24-29 14.33x24 22x44 15.50x39 20x29 16.32-28 12-18 B+

Skliarow - Kolesov 1-1
Skliarow - Kolesov 1-1

The surprise of this tournament is the return of the former youth world champion of 1976 Skliarow, who did not compete in international tournaments for a very long time. Earlier in the game he had already won a piece against the leader Kolesov, but here he spoiled it with 46.34-29? 25-30! 47.29x20 8-13 48.35x24 19x30 with a draw as result. If he had played   46.31-27! he would have headed the tournament after 5 rounds.

© Wieger Wesselink http://10x10.org