1. d4 Nf6 2. c4 c5

This was the first time I played the Benoni. I think it is a good choice on a simultan as the middle game positions are very sharp and demand a lot of calculation from both players.

3. e3

3. d5 leads to the Benoni.

3... g6 4. Nc3 Bg7 5. d5 O-O 6. Bd3 d6 7. Nge2 e6 8. O-O exd5 9. cxd5 a6 10. a4 Re8 11. Ng3 Nbd7 12. e4 Qc7

We have reached a normal Benoni position, with the only difference that White is a tempo down as he played e4 in two moves.

13. f4

White`s main idea in this setup is to play e5, and (after dxe5) f5, trying to organize a king side attack.

13... c4 14. Bc2 Rb8?!

Passive. Much better is 14... Nc5! for example: 15. e5 dxe5 16. f5 Nd3 17. Bxd3 Qc5+ 18. Kh1 cxd3 19. Qxd3 Qd4.

15. Kh1 b5 16. axb5 axb5 17. e5 dxe5 18. f5 Qb6?

Neglects development. In the next few moves Black makes a circle with his Queen, while his Bishop is still undeveloped. Two better alternatives:

18... Nc5 19. Bg5 Rb6! .

18... Bb7 19. Nxb5 Qc5 20. Nc3 Bxd5.

In both cases Black gets fully developed.

19. Bg5 Qd4 20. Qf3 Qg4 21. Qe3 b4

21... Qd4 looks like a draw by repetition, but I decided to push for more - although I saw that my Queen will be trapped.

22. Be4?

It traps the black Queen, but loses too much material.

I expected: 22. Rad1? bxc3 23. h3 Qxd1! (23... Qd4?! was my plan 24. Rxd4 exd4 25. Qxd4 Ne4) 24. Rxd1 cxb2 and Black has more than enough for the Queen.

22. Nce4!! is the winning move. After: 22... Nxd5 23. Qf2 ( or 23. Qd2) Black cannot defend the threats Bd1 and h3 properly.

22... bxc3 23. h3 Qxg3 24. Qxg3 Nxe4 25. Qe3 cxb2 26. Qxe4 bxa1=Q 27. Rxa1 gxf5 28. Qxc4 e4 29. Re1 Ne5 30. Qc7 Rb7 31. Qd6 Rd7 32. Qb8 Nd3 33. Rb1 Rxd5 34. Rb5 Be5 35. Qb6 Nf2+ 36. Kg1 Rd1+

0-1

Annotator(s): Gábor Horváth (see source).

Source(s): My game against GM Keene, Belfast Chess blog, April 15, 2015.