Dutch Championship 2017 Urk round 9

Nico Knoops - Waldo Aliar 2-0

1.33-28 18-22 2.38-33 12-18 3.42-38 7-12 4.32-27 19-23 5.28x19 14x23 6.35-30 20-25 7.30-24 1-7 8.34-29 23x34 9.40x29 10-14 10.24-20 15x24 11.29x20 25-30 12.20-15 30-35 13.45-40 17-21 14.40-34 21x32 15.37x17 12x21 16.33-28 7-12 17.39-33 5-10 18.44-39 13-19 19.38-32 21-26 20.32-27 26x37 21.41x32 9-13 22.43-38 12-17 23.50-44 17-22 24.28x17 11x31 25.36x27 6-11 26.33-28 11-17 27.46-41 8-12 28.48-42 2-8 29.38-33 19-23 30.28x19 14x23 31.33-28 23-29 32.34x23 18x29 33.39-33 29x38 34.42x33 12-18 35.49-43 10-14 36.43-39 3-9 37.41-37 18-22 38.27x18 13x22 39.37-31 16-21

diagram 7
diagram 1

40.28-23!

All of a sudden black is in trouble.

9-13?

Aliar doesn't find a solution. There were two somewhat problematic defenses. First of all, black could play 21-26 41.23-19 26x28 42.19x10 17-21 43.33-29 9-14 44.10x19 4-10 45.15x4 35-40 46.4x16 40x49 47.16-7 49-38 etc. Secondly, black could play 8-12 41.31-26 22-28! 42.33x11 35-40 43.26x8 40x49 44.32-28 49-40! etc.

41.23-18 35-40 42.18x16 40x49 43.32-27 49x21 44.16x27 13-18 45.31-26 14-19 46.39-34 19-24 47.33-28 8-12 48.47-41 24-29 49.34x23 18x29 50.27-22 29-34 51.22x11 34-40 52.11-6 40-44 53.28-22

Wouter Sipma - Hein Meijer 2-0

1.32-28 17-22 2.28x17 11x22 3.37-32 6-11 4.31-26 12-17 5.36-31 8-12 6.32-27 16-21 7.27x16 22-28 8.33x22 18x36 9.41-37 19-23 10.37-32 12-18 11.39-33 14-19 12.32-27 1-6 13.27-21 7-12 14.16x7 12x1 15.21x12 18x7 16.46-41 13-18 17.41-37 6-11 18.37-32 7-12 19.32-27 11-17 20.38-32 17-22 21.43-38 22x31 22.26x37 9-13 23.32-27 10-14 24.44-39 4-9 25.38-32 20-24 26.42-38 14-20 27.37-31 5-10 28.33-28 20-25 29.31-26 10-14 30.49-43 2-7 31.26-21 7-11 32.21-16 11-17 33.39-33 14-20

diagram 2
diagram 2

34.43-39?!

This move is not without risk.

1-7?

With 9-14! 35.48-43 24-29 36.33x24 20x29 37.34-30 25x34 38.39x30 3-8 black could have gained a significant advantage.

35.48-43!

Now black is in a lot of trouble.

24-29 36.33x24 20x29 37.47-41! 36x47 38.27-22 47x44 39.22x2 44x6 40.43-39 6x44 41.40x49 29x40 42.35x44?

It turns out that 42.45x34 was much better.

9-14 43.45-40 12-17 44.40-34 18-22?

This allows white to take a winning combination. Possibly Meijer played it on purpose, since the remaining endgame is still very complicated. After 3-8! the computer declares the position to be a draw.

45.32-28! 23x32 46.34-30 25x34 47.44-39 34x43 48.49x20 15x24 49.2-7 17-22 50.16-11 24-30 51.11-6?

This is incorrect. The proper move was 51.7-29 22-27 52.29-42 to stop the black pieces.

22-27 52.7-18 27-32 53.18-4 19-23?

With 30-34! 54.4-10 34-39! black could make a draw here.

54.4-10 23-28 55.6-1 28-33 56.10x37 33-38 57.50-44 3-9 58.1-29

Marino Barkel - Jitse Slump 2-0

1.32-28 17-22 2.28x17 12x21 3.37-32 7-12 4.34-29 1-7 5.40-34 19-23 6.45-40 14-19 7.42-37 20-25 8.50-45 15-20 9.31-26

diagram 1
diagram 3

11-17!?

Slump aims for a total clash of the positions.

10.36-31 7-11 11.31-27 2-7 12.37-31 10-15 13.48-42(?)

Barkel decides to cooperate with his opponent. But with 13.41-36! 5-10 14.47-42 10-14 15.46-41 4-10 16.33-28! he could have successfully frustrated the black plans.

19-24!

Now 14.34-30? is not possible due to the spectacular combination 23x34 15.30x19 13x24 16.39x19 25-30 17.35x24 20x29 18.33x24 8-13 19.19x8 15-20 20.24x15 9-13 21.8x19 4-10 22.15x4 3-8 23.4x22 17x50 24.26x17 12x43 25.49x38 B+

14.41-36 13-19 15.46-41 9-13 16.42-37 4-9 17.47-42 5-10 18.27-22 17x28 19.33x22 24x33 20.39x28 18x27 21.31x22 10-14?

It was safer to play 12-18 22.26x17 18x27 23.32x21 11x33 24.38x18 16x27, since the counter combination 25.43-39 13x22 26.36-31 27x38 27.39-33 38x29 28.34x5 results in a draw after 7-11! 29.5-32 8-13 30.40-34 9-14 31.32x5 13-19 32.5x17 11x22. But that would require the black player to already anticipate the tactical maneuver that Barkel will bring into play.

22.26x17 12x21 23.34-30 25x34 24.40x18 21-26 25.44-39 20-24(?) 26.39-34!

diagram 2
diagram 4

8-12?

Slump becomes the victim of a hidden combination.

27.45-40! 12x23 28.22-17! 11x33 29.38x18 13x22 30.34-29 24x33 31.37-31 26x39 32.40-34 39x30 33.35x4 14-19 34.4x31 19-23 35.32-27 16-21 36.27x16 15-20 37.31-48 23-29 38.48-25 7-12 39.25x14 29-34 40.14-23 33-38 41.23x45 38-42 42.45x7 42-48 43.7-12 48-26 44.12-34 26-48 45.34-25 48-42 46.25-39 42-48 47.39-25 48-42 48.25-14 42-48 49.14-23 48-42 50.49-44 42-48 51.44-40 48-42 52.40-35 42-48 53.23-12 48-26 54.12-34 26-42 55.34-48 42-29 56.41-37 3-9 57.48-39 9-14 58.37-31 14-19 59.31-26 19-23 60.39-17 29-45 61.17-33

Ben Provoost - Ron Heusdens 0-2

1.31-27 19-23 2.33-28 17-21 3.28x19 14x23 4.39-33 11-17 5.44-39 21-26 6.34-30 17-21 7.30-25 12-17 8.25x14 10x19 9.35-30 5-10 10.30-25 10-14 11.40-34 7-11 12.45-40 1-7 13.34-30 14-20 14.25x14 9x20 15.30-25 4-9 16.25x14 9x20 17.39-34 7-12 18.50-45

diagram 3
diagram 5

20-25!

It looks like after this move the conditions for a 'half classical' strategy for white are ideal. But Heusdens will demonstrate that black has a lot of counter play.

19.40-35 17-22 20.35-30 22x31 21.36x27 12-17 22.33-29 2-7 23.38-33 7-12 24.41-36 17-22 25.47-41 22x31 26.36x27 12-17 27.41-36 17-22 28.46-41 22x31 29.36x27 11-17 30.45-40 17-22 31.41-36 22x31 32.36x27 6-11 33.40-35

diagram 6
diagram 6

23-28!

This is probably the best practical chance for black. An interesting alternative was 11-17 34.33-28 19-24! 35.29x20 25x14! 36.28x10 15x4 37.43-39 17-22 38.39-33 22x31 39.42-38 31x42 40.48x37 18-23(!) but white should be able to defend this position.

34.32x14 21x41 35.42-37 41x32 36.30-24 32-37 37.24-19 13x24 38.29x20 15x24 39.14-10 8-13 40.10-4?

This loses. White should have gone for 40.10-5 11-17 41.5x41 18-23 42.41x21 16x27 43.43-39 26-31 44.49-43 31-37 45.34-30 25x34 46.39x19 3-9 47.33-29 37-41 48.29-23 etc.

11-17 41.49-44 3-9 42.43-38 18-22 43.48-42 37x48 44.38-32 48x30 45.32-27 22x31 46.33-29 24x33 47.35x24 31-36

© Wieger Wesselink http://10x10.org