SWMG 2011 round 3

Boomstra and Valneris fought a hard battle that ended with a series of blitz games. The decision finally came when Boomstra managed to take over the control of the center of the board. 22.34-29! 23x34 23.40x29 10-14 24.37-32! 11-16 25.32x21 16x27 26.33-28! The white moves are simple but effective. 9-13 27.38-33 14-19 28.45-40! 19x30 29.40-35! The merit of the white plan is that black has no time to push white backwards with 30-34? 30.29x40 due to the simple combination after 18-22 31.36-31 27x36 32.26-21 17x26 33.28x19 W+. ≡ 18-22 30.35x24 Now Valneris needs to come up with a plan to disturb the white center, but in the little time that is left he does not succeed in it. A good way to do this was using the temporary sacrifice 13-19! 31.24x13 27-31 32.36x18 12x34 33.39x30 25x34 34.43-39 34x43 35.48x39 3-9 with an easy draw. ≡ 3-8? 31.28-23! 4-9 32.43-38 25-30? Black chooses an incorrect plan, but the situation was already precarious. 33.24x35 9-14 34.47-42 13-19 35.42-37 19x28 36.48-43! White captures the black outpost on 28 in a very elementary way. 8-13 37.38-32 27x38 38.43x23 7-11 39.29-24 and Boomstra won easily.

In the rapid game Shaibakov managed to beat Silva. White has a passive position, and needs to defend carefully. 45.39-33 18-22! 46.27x18 12x23 Black gains two important tempos using this exchange. 47.32-27 7-11 48.42-37 13-18 49.37-32 17-22! 50.40-34(?) White accepts another loss of 2 tempos, and subsequently will get under a lot of pressure. It was much safer to play ≡ 50.27-21 11-17 51.21x12 18x7 52.32-27 22x31 53.26x37 here. ≡ 22x31 51.26x37 18-22! 52.35-30? The losing move. With ≡ 52.34-30! 9-13 53.37-31 13-18 54.32-27!! 23-28 55.33-29 24x42 56.31-26 22x31 57.26x48 white could have saved the game. ≡ 24x35 53.33-29 22-28 54.29x18 19-23! 55.18x29 28-33 56.29-24 33x31 57.32-27 31x22 58.24-20 14-19 59.20-15 9-14 60.25-20 14x25 61.15-10 19-24 62.10-4 11-17 and white resigned.

Georgiev played the unexpected move 32.33-28! Of course black can not accept the gift with 4-10? 33.28x19 13x35 due to the combination 34.37-31 26x28 35.38-33 21x32 36.33x2 W+ The best reaction for black would have been ≡ 14-19 Then white can react with 33.37-31! 26x37 34.42x31 Now the logical 21-26? is not possible due to the hidden combination 35.38-33 26x37 36.30-24 19x30 37.28x19 37x28 38.25x34 13x24 39.33x2 W+ But after ≡ 19-24 35.30x19 23x14 36.41-37 21-26 the position is in balance. ≡ 26-31? 33.28x10 31x22 34.30-24 4x15 35.39-33 Now Georgiev has a significant advantage, due to the weak black left wing. 22-27? And after this move the white attack is decisive. 36.41-36 3-9 37.33-28 18-22 38.28-23 8-12 39.23-19! 12-18 40.19x8 9-13 41.8x19 18-23 42.19x28 22x33 43.38x29 27x49 44.42-38 and black resigned.

Ndjofang faces a difficult classical position. The natural development 12-17? fails due to 40.27-21 16x27 41.32x12 8x17 42.37-31 26x37 43.38-32 37x28 44.33x11 W+, and so black is forced to build an immobile center with ≡ 12-18 40.33-28 8-12 41.40-34 3-8? Here black needed to play ≡ 12-17!, without fearing 42.27-22 18x27 43.32x12 23x41 44.47x36 13-18 45.12x23 19x28 46.30x10 15x4. Then white has a piece advantage, but black can easily make a draw. And if white plays ≡ 42.39-33, then 17-21 43.34-29 23x34 44.30x39 3-8! 45.47-42 8-12! 46.28-22 18-23 (or ≡ 24-29! 47.33x24 19x30 48.25x34 18-23 =) ≡ 47.22-17 23-28 (and not ≡ 12-18? 48.39-34 21x12 49.27-22 18x27 50.32x21 26x17 51.25-20 14x25 52.33-29 24x33 53.38x9 W+) ≡ 48.17x8 13x2 49.33x22 19-23 is enough to make a draw. ≡ 42.39-33! 23-29 43.34x23 18x29 44.28-22 12-17 45.22x11 16x7 46.33-28 8-12 47.47-41 7-11 48.41-36 11-16 49.36-31 12-17 50.27-22 15-20 51.22x11 16x7 52.31-27 7-11 53.27-22 11-16 54.37-31 26x37 55.32x41 16-21 56.41-37 29-34 57.30x39 and with a piece more Amrillaev won the game.

When Getmansky played 28.40-34? Meurs reacted with 12-17! Now 29.34-30? is not possible due to the combination 26-31 30.37x26 24-29 31.33x24 17-21 32.26x17 11x44 B+ And so white has to settle for the ugly ≡ 29.45-40 14-20! 30.25x14 9x20 31.34-30 20-25 32.40-34 with a huge advantage for black. In the game Getmansky lost a piece after ≡ 29.27-22? 16-21 30.48-43 21-27 31.32x12 23x41 32.36x47 8x28 33.33x22 24-29 34.34x23 19x17 But Meurs failed to win the game, and in a later game he lost due to a simple combination.

In the women's tournament Golubeva booked an important victory in the rapid game against Tkachenko. 33.37-32? An interesting moment. First of all white had a winning combination using ≡ 33.34-29! 23x34 34.25-20 14x25 35.33-29 34x23 36.37-32 25x34 37.32x1 W+ Moreover, there was no real need for white to simplify the position, since she could keep the encirclement of the black attack going with ≡ 33.33-29. ≡ 7-12 34.32x21 22-28 35.33x22 18x16 36.38-32 12-18? Grandmaster Presman explained on the Chinese television that this was not a good move from Tkachenko. 37.43-38 15-20 38.31-27 During this phase of the game Golubeva had more time trouble than her opponent. But it seemed like Tkachenko was the most affected by it. 14-19(?) 39.25x14 9x20 40.34-29! This is not a winning combination, but it probably caught Tkachenko by surprise. 23x25 41.27-21 16x27 42.32x14 20x9 43.26-21! 11-16? This is a terrible move, since it gives white an extremely strong outpost on 17. With ≡ 3-8! black could relatively easily defend the position. ≡ 44.21-17 3-8 45.38-33 13-19 46.33-29? This move was tempting, but it gives black an opportunity to get back into the game. After ≡ 46.49-43! 9-13 47.35-30! 25x34 48.39x30 8-12 49.17x8 13x2 50.33-29! white could win immediately. ≡ 19-24? Black should have played ≡ 8-13! 47.29-24 19x30 48.35x24 9-14! 49.17-12 25-30 50.24x35 6-11 with enough compensation for a draw. ≡ 47.29x20 25x14 48.39-33 9-13 49.33-29 13-18 50.35-30 8-13 51.29-24 18-23 52.30-25 23-28 53.36-31? 28-33 54.49-43 14-19 55.24-20 19-23 56.20-14 23-29 57.14-10 29-34 58.10-4 33-38 59.4x45 38x49 60.45-18 49-35 61.25-20 and here Tkachenko lost on time. The endgame is still a draw, but it was too difficult to find in the limited time left.

© Wieger Wesselink https://10x10.org