Saturday October 1st 2016 - The Moriaan in Wijk aan Zee

First round, DSE 1 - EPO 3

Cees Duivenvoorde – Ronny Lange

1. d4, d5

2. Pf3, Pf6

3. e3, e6

4. Ld3, c5

5. b3, Pc6

6. Lb2, Le7

7. 0-0, 0-0

8. Pbd2, a6

9. Pe5, Dc7

10. f4, Ld6

Position after 10. ..., Ld6

White now opens the long diagonal for a king's attack:

11. Pxc6, bxc6

12. dxc5, Lxc5

Position after 12. ...., Lxc5.

Better was Le7, because now a devastating king attack follows. White allows the pawn on e3 to capture with check.

13. Lxf6, Lxe3+

14. Kh1, Lxd2

Black had the alternative to strike back on f6. After 14. …, gxf6 the winning bishop sacrifice follows 15. Lxh7+

Variant with gxf6 and Lh7+

Example 15. …, Kxh7 16. Dh5+, Kg7 17. Dg4+, Kh7 18. Tf3, Lxf4 19. Th3+, Lh6 20. Dh4, Kg6 21. Dxh6, Kf5 22. Tf1+, Ke5 23. Df4 mate (game Cees Duivenvoorde – Jeroen Bakker, Tata Steel Chess Tournament, January 2016)

15. Lxh7+, Kxh7

16. Dh5+, Kg8

17. Dg5

Black gives up. It is uncoverable mate on g7. Example 17. …, g6 18. Dh6 and 19. Dg7 mate.