Dutch Championship 2017 Urk round 2

Anton van Berkel - Jitse Slump 0-2

1.32-28 17-21 2.37-32 11-17 3.41-37 7-11 4.34-29 19-23 5.28x19 14x34 6.39x30 10-14 7.44-39 13-19 8.40-34 8-13 9.45-40 2-8 10.32-28 4-10 11.30-24 19x30 12.35x24 20x29 13.33x24 18-23 14.28x19 14x23 15.47-41 17-22 16.31-26 22-27 17.26x17 11x22 18.37-31 6-11 19.41-37 10-14 20.31-26 11-17 21.37-31 14-20 22.39-33 20x29 23.33x24 5-10 24.43-39 10-14 25.34-30 14-20 26.39-33 20x29 27.33x24 9-14 28.30-25 12-18 29.46-41 8-12 30.41-37

diagram 1
diagram 1

The white strategy has failed. It's clear that white will face a tough defense.

13-19 31.24x13 18x9 32.38-33 15-20 33.42-38 14-19 34.25x14 9x20 35.49-44 20-25 36.40-34 3-8 37.37-32 8-13 38.32x21 16x27 39.33-29 12-18 40.44-40 19-24 41.29x20 25x14 42.50-45 23-28 43.40-35 13-19 44.35-30 18-23 45.48-43 1-7 46.45-40 14-20 47.30-25 7-12 48.25x14 19x10 49.40-35 10-14 50.43-39 12-18 51.35-30 14-20

diagram 2
diagram 2

The decisive phase of the game has started.

52.39-33

A somewhat easier way to make a draw was 52.30-25 20-24 53.38-33 27-32 54.34-30 24x35 55.25-20 35-40 56.20-14 40-45 57.14-9 etc.

28x39 53.34x43 23-28 54.30-25?

This is losing. The correct defense was 54.43-39 18-23 55.39-34 20-24 56.30x19 23x14 57.38-32! 28x37 (or 27x38 58.31-27 22x31 59.36x27 38-42 60.27-21 17-22 61.21-16 etc.) 58.31x42 22-28 59.34-29 14-20 60.36-31!! 27x36 61.42-37 etc.

20-24 55.43-39 18-23 56.39-34 24-29 57.34-30 28-32 58.25-20 32x43 59.20-14 43-48 60.30-25 48-42 61.25-20 23-28! 62.26-21 17x37 63.14-10 42-47 64.10-5 27-32 65.36-31 37x26 66.5-19 32-38 67.19x49 47-41 68.49-38 29-34 69.38-16 34-40

Waldo Aliar - Hein Meijer 0-2

1.32-28 17-22 2.28x17 11x22 3.37-32 12-17 4.41-37 6-11 5.34-30 7-12 6.30-25 1-6 7.46-41 22-27 8.31x22 18x27 9.32x21 17x26 10.38-32 13-18 11.43-38 9-13 12.49-43 4-9 13.39-34 11-17 14.44-39 2-7 15.34-29 17-21 16.50-44 20-24 17.29x20 15x24 18.33-28 7-11 19.36-31 12-17 20.41-36 17-22 21.28x17 21x12 22.32-28 16-21 23.38-32 21-27 24.32x21 26x17 25.37-32 17-22 26.28x17 12x21 27.43-38 21-26 28.31-27 19-23 29.39-33 14-20 30.25x14 10x19 31.33-28 24-29

diagram 3
diagram 3

32.36-31?

A severe mistake. After 32.35-30 5-10 33.40-35 11-17 34.38-33 29x38 35.42x33 white has no problems.

26x37 33.42x31 11-17 34.47-42 18-22 35.27x18 13x33 36.48-43 8-13 37.43-39 17-21! 38.39x28 21-26 39.31-27 29-33 40.38x18 13x31 41.28-22

diagram 4
diagram 4

9-13(?)

Meijer tries to reorganize his defense, before making a king. This turns out to be the wrong plan. Immediately making a king with 31-36 42.42-37 26-31 43.37x26 36-41 was winning here, for example 44.26-21 41-47 45.21-16 9-13 46.32-28 19-23! 47.28x8 3x12 W+

42.44-39 3-8?

Probably the position is a draw now! The most convincing plan for black was a positional approach with 6-11 43.40-34 11-16 44.39-33 16-21 45.33-28 19-24 46.45-40 3-8 47.34-30 31-36 48.30x19 13x24 49.42-37 8-13 50.40-34 5-10 51.34-30 24-29 52.30-25 29-34 B+

43.22-17 8-12 44.17x8 13x2 45.39-33 31-36 46.42-37 26-31 47.37x26 19-23

Black needs to disrupt the white capture position.

48.40-34 36-41 49.32-27?

After this move white is defenseless. He should have played 49.33-29 23-28 50.32x23 41-47 51.26-21! 47x24 52.23-18! and black can't win anymore.

41-46 50.26-21 46-41 51.33-28 23x32 52.27x38 41-28 53.35-30 6-11 54.30-25 11-16 55.21-17 28x11 56.25-20 11-22 57.20-14 16-21 58.34-29 21-27 59.38-33 22x39 60.14-9 39-25 61.9-4 27-32 62.29-23 32-37 63.23-18 25-3 64.4-15 37-41 65.18-13 41-47

Wouter Sipma - Martijn van IJzendoorn 0-2

1.32-28 17-21 2.34-30 11-17 3.40-34 18-23 4.37-32 20-25 5.41-37 15-20 6.33-29!?

A very aggressive move.

10-15 7.29x18 13x33 8.39x28 12-18 9.44-40 5-10 10.50-44 7-12 11.44-39 20-24 12.31-26

diagram 5
diagram 5

18-23

This allows white to simplify the position. And one cannot blame Sipma for grabbing this opportunity. It would have been interesting to watch the clash after 1-7 13.49-44 8-13.

13.34-29 24x44 14.38-33 25x34 15.40x7 1x12 16.49x40 12-18 17.42-38 9-13 18.43-39 17-22 19.26x17 22x11 20.36-31 4-9 21.46-41 18-23 22.35-30 15-20 23.30-25 20-24 24.31-27 8-12 25.47-42 2-8 26.41-36 10-15 27.37-31 12-17

diagram 6
diagram 6

The position looks very quiet now, but this will quickly change.

28.31-26 15-20! 29.27-22 16-21 30.40-35

An alternative plan was 30.48-43 24-30 31.25x34 19-24 32.28x10 17x48 33.26x17 11x22 34.10-5 and the position seems even.

21-27 31.32x12 23x34 32.22-17 11x22 33.12-7 22-28 34.33x22 8-12 35.7x18 24-29 36.26-21 20-24 37.21-17 34-39 38.18-12 39-44 39.12-7 44-49 40.7-2(?)

A problem for white is now that 40.7-1? loses because of 29-34 41.1x40 14-20 42.25x23 24-30 43.35x24 49x32. But making a king on square 2 doesn't help to eliminate the black tactical possibilities. Therefore white should have played something like 40.17-12 49-44 41.22-18 13x22 42.7-1 44-33 43.42-37 19-23 44.12-8 3x12 45.1x4 22-28 etc.

29-33! 41.2-16?

Now Van IJzendoorn decides the game with a nice combination.

14-20!! 42.25x23 6-11 43.16x30 33-39 44.30x43 49x47 45.48-43 47-33 46.22-18 3-8 47.36-31 33-11 48.31-27 11-2 49.18-13 9x18 50.27-21 8-12 51.43-38 2-16

© Wieger Wesselink http://10x10.org