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

Author: Matthew White

Date: 15:04:00 06/16/03

Go up one level in this thread


On June 13, 2003 at 22:20:53, Hristo wrote:

>On June 13, 2003 at 21:45:10, Matthew White wrote:
>
>>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
>>The mistake it made was 21. Kh3, walking directly into a forced mate in 8.
>>Better, it appears, is Kg1, where the sacrifice doesn't show much promise.
>>
>>Here is Shredder 7.04 analysis of the 4 choices:
>>-----
>>  9	 0:01 	+1.28 	21.Kg1 Ng4 22.Nf3 gxf2+ 23.Rxf2 h3 24.a6 Nxf2 25.Kxf2 hxg2
>>26.Na5 bxa6 27.Nxc6 (1.034.334) 521.3
>
>Thank you!
>But what does Shredder come-up with after (as in the line above):
>21.Kg1 Ng4 22.Nf3 h3 ?!
>
>Regards.
22. Nf3 is not the best move in that continuation, but here is analysis based on
the moves you have given:

10/25	 0:01 	+1.45 	23.fxg3 Nxe3 24.Qd2 Nxf1 25.Rxf1 hxg2 26.Re1 Qf6 27.Kxg2 Bd7
28.Qg5 Qxg5 29.Nxg5+ (1.018.008) 794.6
 11/27	 0:02 	+1.20--	23.fxg3 Nxe3 24.Qd2 Nxf1 25.Rxf1 hxg2 26.Re1 Kf8 27.Qg5
Qxg5 (2.148.096) 799.4
 11/27	 0:04 	+1.00 	23.fxg3 Nxe3 24.Qf2 Nxf1 25.Rxf1 hxg2 26.Re1 Qc7 27.Ng5+
Kf6 28.Qf4 Nxf4 29.Rxe6+ Bxe6 (3.490.941) 815.4
 12/31	 0:09 	+1.25++	23.fxg3 Nxe3 24.Qf2 Nxf1 25.gxh3 Rxh3 26.Bxf1 Rh5 27.Be2
Rh8 28.Qe3 Qc7 29.Ng5+ Ke7 (7.103.141) 773.1
 12/31	 0:11 	+1.25 	23.fxg3 Nxe3 24.Qf2 Nxf1 25.gxh3 Rxh3 26.Bxf1 Rh8 27.Ng5+
Qxg5 28.Be2 (8.765.604) 775.9
 13/29	 0:21 	+1.15 	23.fxg3 Nxe3 24.Qd2 Nxf1 25.Rxf1 hxg2 26.Kxg2 Kf8 27.Qg5
(16.792.708) 769.3
 14/38	 0:42 	+1.29 	23.fxg3 Nxe3 24.Qd2 Nxf1 25.Rxf1 hxg2 26.Kxg2 Bd7 27.Kf2
Rh5 28.Be2 Rah8 29.Ne5+ Nxe5 30.Bxh5+ Rxh5 31.dxe5 (32.549.298) 758.9
 15/41	 1:35 	+1.10 	23.fxg3 Nxe3 24.Qd2 Nxf1 25.Bxf1 hxg2 26.Bxg2 Ke8 27.Kf2
Rh5 28.a6 (69.438.742) 730.4



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