Roel Boomstra - Bert Aalberts 2-0 (17-6-2017)

In the final of the Dutch Team Cup 2017 (rapid) Boomstra managed to book an important victory against the hard to beat Aalberts from Witte van Moort. This victory was decisive for the first place of his team Hijken.

1.33-29 17-22 2.39-33 19-23 3.35-30 14-19 4.30-25 11-17 5.25x14 9x20 6.32-28 23x32 7.37x28 10-14 8.41-37 5-10

diagram 1
diagram 1

9.29-23 18x29 10.34x23

This position occurs only 5 times in the database, but Boomstra is in good company: both Sijbrands and Shvartsman played it twice.

13-18(?)

A more constructive plan was 20-24 11.43-39 15-20 (this prevents 12.37-32? by 24-29 13.33x15 22x33 14.39x28 17-22 15.28x17 19x26 B+) 12.49-43 3-9

11.43-39 18x29 12.33x13 22x33 13.39x28 8x19 14.37-32

diagram 2
diagram 2

Now the black position is a little unbalanced, due to the large hole in the center.

12-18 15.46-41 4-9 16.41-37 9-13 17.44-39 7-12 18.40-34 2-8 19.38-33 19-23 20.28x19 14x23 21.33-28 3-9 22.28x19 13x24 23.42-38 9-13 24.47-42 1-7 25.49-43 10-14 26.45-40 18-23 27.39-33 24-29 28.33x24 20x29 29.43-39 23-28 30.32x23 29x18 31.39-33 16-21 32.37-32

diagram 3
diagram 3

7-11(?)

A more natural development was 6-11, or 21-26 33.31-27 6-11.

33.31-27 21-26 34.40-35 26-31 35.27-21 17x26 36.36x27

diagram 4
diagram 4

11-17?

This is a dangerous move. After 13-19! 37.33-28 8-13 the black problems would be marginal. A problem for white is that after 38.50-44 black can force a draw with 19-23 39.28x17 11x31 40.44-39 31-36 41.42-37 26-31 42.37x26 36-41. In fact this is even dangerous for white.

37.33-28! 14-19 38.38-33 19-24 39.42-38 6-11 40.50-44 11-16 41.44-39 17-22 42.28x17 12x21 43.33-28 13-19 44.38-33 18-23 45.28-22 15-20 46.48-43

diagram 6
diagram 5

20-25?

A much better move was 8-13! Then 47.33-28 24-29 48.43-38 29x40 49.35x44 23-29 50.44-40 20-25! leads to a draw after 51.39-34 26-31 52.34x14 31-37 53.32x41 21x43. And 47.35-30 24x35 48.33-29 23-28 49.32x25 21x32 leads to a draw as well.

47.34-29! 23x34 48.39x30 25x34 49.22-18!

Boomstra surprises his opponent with a beautiful piece sacrifice. Note that 47.34-30 25x34 48.39x30 also looked attractive, but then black has an easy escape using 8-12! 49.33-28 12-17 50.22x11 16x7 51.27x16 26-31 etc.

26-31?

An understandable mistake. The only way to make a draw was the problematic 8-12!! 50.18x7 19-23! and after 51.32-28 23x32 52.27x38 26-31 53.7-1 31-37 54.1x45 37-41 55.45-29 24-30 56.35x24 41-46 white cannot win, due to the vulnerable piece on 43.

50.27x36 21-27 51.32x21 16x27 52.43-38 34-39 53.33x44 24-29 54.44-39 27-32 55.38x27 19-23 56.27-22 23x12 57.39-34 29x40 58.35x44 8-13 59.44-39 12-18 60.22-17 18-23 61.17-12 23-28 62.12-7

© Wieger Wesselink http://10x10.org