Boomstra - Getmanski 1-1
Boomstra - Getmanski 1-1

After 13-18? Boomstra could win beautifully using 34.37-31! 26x37 35.42x31 Now 6-11? 28-22! 9-13 31-26 and   8-12? 27-22 18x29 39-34 23x32 34x5 are not possible, so black must play   21-26 or? 36.27-21 16x29 37.40-35 26x37 38.44-40 23x32 39.48-42 37x48 40.39-34 48x30 41.25x5 W+   34.42-38? The young Dutch player doesn't see it, but he gets another chance to win the game: 9-13 35.40-35 10-14? Getmanski underestimates the power of the Ghestem attack 36.28-22! 23-29 Since after   8-12? 37.22-17! black is the victim of a terrible 'zugzwang'.   37.44-40 18-23 38.33-28 8-12 39.39-33 6-11

Boomstra - Getmanski 1-1
diagram 1

40.35-30? Boomstra cannot resist the combination that leads to an endgame with a piece advantage. However, it turns out that it is not enough for a win. Instead the backwards exchange   40.40-34 29x40 41.35x44 was hopeless for black. The main variant is 23-29 42.44-40 13-18 43.22x13 19x8 44.48-43 8-13 45.43-39 11-17 46.39-34! 13-18 47.34x23 18x29 48.27-22! W+   24x44 41.33x24 19x30 42.28x6 44-50 43.25x34 50x17 44.6-1 17-28 45.32x23 21x41 46.23-18 26-31 47.18-12 31-36 48.48-42 16-21 49.34-29 21-27 50.12-7 14-19 51.1-6 41-46 52.7-2 19-23 53.29x18 36-41 54.18-13 27-32 55.38x27 41-47 56.27-22 47x8

Gantvarg - Artykow 2-0
Gantvarg - Artykow 2-0

After 17-21? Gantwarg won a piece using a well-known scheme 22.26x17 11x22 23.28x17 12x21 24.33-28! 7-12 25.41-37 9-13 26.43-39 6-11 27.37-31 12-18 28.31x22 18x27 29.38-33 13-18 30.28-22 27-32 31.22x13 32-37 32.47-42 21-26 33.42x31 26x37 34.33-29! 24x33 35.13x24 33-38 36.34-29 11-17 37.39-33 38-42 38.36-31 37x26 39.48x37 and Gantwarg won the game.
Artykow should have played   9-13 22.43-39 17-22 23.28x17 11x22 24.48-42 13-18. Then he is still under pressure, but it does not lose a piece.

Valneris - Mogilianski 1-1
Valneris - Mogilianski 1-1

Here Valneris played 52.24-20? At first sight this looks winning, but it turned out that black can make a draw in the resulting endgame with two pieces less. The endgame   52.29-23! 13-18 53.23x12 17x8 54.28x17 21x12 55.24-20 would have given much better opportunities.   14-19 53.29-23 25x14 54.23-18 14-20 55.18x16 20-24 56.31-27 24-29 57.33x24 19x30 58.27-21 17-22 59.28x17 13-18 60.32-27 30-34 61.16-11 34-39 62.11-7 39-44 63.21-16 18-23? The draughts program Kingsrow indicates that this is a losing move. After   44-50! it was still a draw.   64.7-2 23-29 65.2-30 44-50 66.27-22 50-44 67.16-11? But after this move the white pieces are too vulnerable. White should have waited with   67.30-25 44-50 before playing 68.16-11. Then the black king is out of position on square 50.   44-35! Mogliljanski grabs his chance and finds a magnificent escape 68.30-48 35-19 69.48-42 19x41 70.42x15 41-14 71.22-18 26-31 72.11-6 31-37 73.15-47 14-3 74.18-12 3-9 75.12-8 9-36 76.8-3 37-41 77.17-12 41-46 78.6-1 36-18 79.12x23 46x5 80.1-12

Ndjofang - Virny 0-2
Ndjofang - Virny 0-2

In this difficult position Ndjofang played 40.33-28? This enabled Virny to finish the game with 21-26! Now white has several possibilities, but they all lose quickly: 41.28-23? 27-31 42.23x12 31x42 43.48x37 2-8 44.12x3 13-19 45.24x13 9x18 46.3x20 15x35 B+ or   41.41-36? 27-32 42.28-23 32x41 43.36x47 2-8 44.23x3 13-19 45.24x13 9x18 46.3x20 15x35 B+ or   41.48-42? 27-31! 42.41-36 18-22 43.36x18 13x35 B+   41.40-35(?) 27-32! 42.28-22 18x27 43.37x28 26-31! The white left wing has become too weak. 44.39-33 31-36 45.41-37 27-32 46.28-22 32x41 47.22-17 41-46 48.17-11 2-7 49.11x2 14-20 50.2x19 46x5

© Wieger Wesselink http://10x10.org