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Subject: Re: Winning against a computer and not knowing what was the pivotal move

Author: Anthony Cozzie

Date: 18:40:13 06/13/03

Go up one level in this thread


On June 13, 2003 at 20:57:07, Hristo wrote:

>This was blitz (10 min. for all) game, but even after analyzing the game at 2:15
>per move the engine had no idea of the trouble until it was too late.
>
>At what move do other programs consider white's position to be dangerous?
>How do other programs evaluate 19. ... Bxh2+ ?!
>
>[Event "?"]
>[Site "?"]
>[Date "2003.06.13"]
>[Round "?"]
>[White "Sigma Chess 6"]
>[Black "Hristo Doichev"]
>[Result "0-1"]
>[ECO "A01"]
>
>1. b3 f5 2. Nf3 Nf6 3. d4 d5 4. e3 e6 5. Bd3 Bd6 6. O-O Nbd7 7. Bb2 h6 8. c4 c6
>9. c5 Bc7 10. Nbd2 Qe7 11. b4 a5 12. Nh4 Nf8 13. bxa5 g5 14. Nhf3 Ng6 15. Nb3
>g4 16. Ne1 h5 17. Bc3 Kf7 18. Qc2 h4 19. Rb1 Bxh2+ 20. Kxh2 g3+ 21. Kh3 Bd7 22.
>f3 Rag8 23. Nc1 Nh7 24. f4 Qg5 25. Qd1 e5 26. Be2 exf4 27. Bh5 Qg4+ 28. Qxg4
>fxg4+ 29. Bxg4 Ng5# 0-1
>
>Regards,
>Hristo

After Bxh2 Kxh2 g3, Zappa says white wins, although its line looks *very*
precarious:
1. Kh1 Ng4 2. Nf3 Nxf2 3. Kg1 h3 4. Rxf2 gxf2 5. Qxf2 Bd7 6. Qg3 hxg2 7. Ne5
Nxe5 8. dxe5
 = (1.53)	Depth: 11	00:00:42.13	11645kN

After Kh3? Zappa goes extension crazy and ends up giving a big plus to Black:
1...Ne4 2. Bxe4 Nf4 3. exf4 fxe4 4. f5 e5 5. Qxe4 dxe4 6. fxg3 hxg3 7. Kxg3
 = (3.10)	Depth: 9	00:01:31.52	20541kN

Another pivotal move seems to be 23. Nc1. Zappa plays it for a while, then gives
it up for f4.
1. f4 Ng4 2. Qd2 Nh2 3. Rh1 Ng4 4. Rf1
 = (0.00)	Depth: 10	00:00:52.17	13919kN

After 23. Nc1, Zappa announces mate.
1...Nh7 2. f4 Qg5 3. Qd1 e5 4. Be2 exf4 5. Rxf4 Qg4 6. Rxg4 fxg4 7. Bxg4 Ng5
 =   MAT6	Depth: 9	00:00:02.65	761kN

anthony



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