Dutch Championship 2017 Urk round 11

Martijn van IJzendoorn - Hein Meijer 2-0

1.34-29 17-22 2.40-34 11-17 3.45-40 6-11 4.50-45 1-6 5.31-26 16-21 6.32-28 19-23 7.28x19 14x23 8.35-30 10-14 9.30-24 5-10 10.37-31 23-28 11.40-35 20-25 12.24-20 15x24 13.29x20 14-19 14.20-15 9-14 15.44-40 19-23 16.35-30 14-19 17.30-24 19x30 18.40-35 21-27 19.35x24 11-16 20.45-40 17-21 21.26x17 12x21 22.40-35 21-26

diagram 1
diagram 1

This position seems to be brand new, which is quite unexpected in an opening scheme that used to be very popular.

23.33-29!? 26x37 24.41x21 16x27 25.42-37 7-11 26.38-32 27x38 27.43x32 8-12 28.36-31 11-17 29.47-42 6-11 30.49-43 11-16

diagram 3
diagram 2

31.32-27!?

Van IJzendoorn is taking extreme risks in this game.

2-8 32.42-38 17-21?

After 10-14! 33.38-32 (here 33.38-33 14-20 34.31-26 22x42 35.33x11 16x7 36.48x37 is losing) 14-20! white has a very difficult position. The only way to survive seems 34.46-41 17-21 35.41-36 21-26 36.43-38 12-17 (here 3-9 37.38-33 9-14 also doesn't win for black because of the piece sacrifice 38.24-19! 13x24 39.48-43! 8-13 40.34-30 25x34 41.39x17 28x48 42.17x10 48-43 43.15x24 4x15 44.32-28 43x21 45.28-22 18x27 46.31x22 etc.) 37.27-21 16x27 38.32x12 8x17 39.48-43 17-21 40.38-32 21-27 41.32x21 26x17 42.31-26 3-9 43.36-31 9-14 44.35-30 14-19 45.26-21! 17x26 46.43-38 22-27 47.31x33 23-28 48.33x22 18x27 49.37-32 27-31 50.32-28 and white can escape.

33.38-32! 12-17?

After a second mistake white is taking the lead. After 10-14! white would be forced to sacrifice a piece with 34.24-20 14-19 35.35-30 25x14 36.43-38. However, after 12-17 37.38-33 8-12 38.31-26 22x42 39.33x11 16x7 40.26x8 3x12 41.48x37 the result would be a draw.

34.46-41 10-14?

Meijer makes the decisive mistake.

35.34-30! 25x34 36.39x30 23x25 37.32x12 21x32 38.12x21 16x47 39.37x17 47x20 40.15x24 3-9 41.17-11 25-30 42.24-19 13x24 43.11-6 14-20 44.6-1 20-25 45.1-23

Nico Knoops - Jitse Slump 0-2

1.33-28 17-21 2.39-33 21-26 3.44-39 11-17 4.49-44 7-11 5.33-29 17-21 6.38-33 11-17 7.42-38 6-11 8.47-42 1-6 9.29-24 20x29 10.34x23 18x29 11.33x24 19x30 12.35x24 12-18 13.39-34 17-22 14.28x17 21x12 15.44-39 14-19 16.50-44 19x30 17.34x25 10-14 18.32-28 11-17 19.39-33 14-19 20.44-39 5-10 21.28-23 19x28 22.33x11 16x7 23.31-27 10-14 24.37-31 26x37 25.41x32 13-19 26.46-41 6-11 27.41-37 11-17 28.39-33 8-13 29.33-28 15-20 30.36-31 20-24 31.40-35 7-11 32.43-39 2-7 33.39-33 18-22 34.27x18 12x23 35.31-27 14-20 36.25x14 9x20 37.48-43 20-25

diagram 4
diagram 4

38.37-31?

During the last ten moves already something went wrong for the white player. And after this mistake the game is over. With 38.45-40 7-12 39.43-39 4-9 40.28-22 17x28 41.33x22 Knoops could have defended his position successfully.

13-18! 39.42-37 24-30

Auke Scholma - Waldo Aliar 1-1

1.34-30 17-22 2.30-25 11-17 3.31-26 6-11 4.37-31 22-27 5.32x21 16x27 6.31x22 18x27 7.41-37 13-18 8.40-34 9-13 9.45-40 4-9 10.46-41 19-23 11.35-30 13-19 12.40-35 8-13 13.33-29 2-8 14.38-33 20-24 15.29x20 15x24 16.50-45 10-15 17.44-40 1-6 18.42-38 17-22

diagram 5
diagram 5

19.37-31? 22-28?

Both players missed the unusual combination 27-32! 20.38x27 23-29! 21.34x23 18x38 22.27x18 13x22 23.43x32 14-20 24.25x23 22-28 25.30x19 28x46 B+.

20.33x22 5-10 21.22-17 12x21 22.26x17 11x22 23.41-37 8-12 24.39-33 3-8 25.34-29 23x34 26.40x20 15x24 27.37-32 6-11 28.32x21 22-28 29.33x22 18x16 30.38-32 11-17 31.47-42 17-22 32.42-37 13-18 33.43-38 9-13 34.48-42 22-28 35.32x23 19x28 36.30x19 13x24 37.38-32 7-11 38.32x23 18x29 39.45-40 14-19 40.42-38 16-21 41.37-32 10-14 42.49-43 11-16 43.32-28 12-17 44.38-32 8-12 45.31-27 21-26 46.36-31 26x37 47.32x41 12-18 48.41-37 18-23 49.37-32 17-21 50.43-38 21-26 51.28-22 16-21 52.27x16 26-31 53.22-17 31-36 54.17-12 36-41 55.16-11 41-47 56.11-6 47x33 57.12-7 33-28 58.7-2 28x46 59.6-1 46-41 60.1-6 14-20 61.25x14 19x10 62.2x30 41-36 63.30-34 36-18 64.6-50 18-36 65.34-39

Wouter Sipma - Ron Heusdens 1-1

1.32-28 19-23 2.28x19 14x23 3.37-32 10-14 4.41-37 5-10 5.34-29 23x34 6.40x29 14-19 7.45-40 10-14 8.39-34 18-23 9.29x18 12x23 10.44-39 7-12 11.46-41 17-21 12.32-28 23x32 13.37x28 21-26 14.41-37 11-17 15.38-32 17-22 16.28x17 12x21 17.33-28 13-18 18.31-27 9-13 19.39-33 4-9 20.34-30 20-25 21.30-24 19x30 22.35x24 14-19 23.40-35 19x30 24.35x24 9-14 25.49-44 14-19 26.42-38 19x30 27.28-23 18x29 28.33x35 6-11 29.38-33 3-9 30.44-39 11-17 31.43-38 8-12 32.39-34 12-18 33.50-44 2-7 34.35-30 7-11 35.44-40 1-6 36.40-35 15-20 37.47-41 17-22 38.48-42 22x31 39.36x27 13-19 40.33-29 9-13 41.38-33 20-24 42.29x20 25x14 43.33-29 11-17 44.30-25 6-11 45.41-36 19-23(?) 46.29-24!

diagram 6
diagram 6

14-19?

Black had to play 17-22! and 47.24-19 22x31! 48.19x28 21-27 49.32x21 16x27 is just enough for a draw: 50.34-29 13-19 51.29-24 19x30 52.35x24 11-17 53.24-20 14-19 54.20-15 18-22 55.15-10 22x33 56.10-5 33-38! etc.

47.34-30?

Sipma could have won he game using the not too difficult 47.24-20! 17-22 48.20-15 22x31 49.36x27 23-28 50.32x12 21x41 51.42-37 41x32 52.15-10 etc.

17-22 48.25-20 22x31 49.36x27 23-28 50.32x14 21x41 51.14-10 13-19 52.24x22 41-47 53.30-24 47x17 54.10-5 26-31 55.5-46 16-21 56.20-15 21-27 57.15-10 17-3 58.46-41 11-16 59.41-47 31-37 60.10-4 27-31 61.4x36 37-41 62.36-4 41-46 63.4-36

© Wieger Wesselink http://10x10.org