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Subject: Re: Kings attack / Piece sacrifice

Author: John Merlino

Date: 14:39:10 07/28/04

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On July 28, 2004 at 16:03:53, Kurt Utzinger wrote:

>How fast does your engine find the winning move 24.Bxg6
>but showing a positive score? Below the output of Crafty 19.15
>
>24.Bxg6!!
>[D]2r2rk1/p3bb1p/2n1Q1p1/q2pP3/3P1P2/p1NB1NR1/1P4P1/1K1R4 w - - 0 24
>
>[Event "New York"]
>[Site "New York"]
>[Date "1947.??.??"]
>[Round "?"]
>[White "Evans, L."]
>[Black "Pilnick, C."]
>[Result "1-0"]
>[ECO "C13"]
>[PlyCount "57"]
>[EventDate "1947.??.??"]
>
>1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. e5 Be7 7. Qg4 O-O 8.
>O-O-O c5 9. h4 cxd4 10. Nce2 Nc6 11. f4 Qa5 12. Kb1 d3 13. cxd3 Bd7 14. Rh3
>Rac8 15. Rg3 g6 16. d4 b5 17. h5 Nb4 18. a3 Nc6 19. hxg6 fxg6 20. Nc3 b4 21.
>Bd3 Be8 22. Nf3 bxa3 23. Qxe6+ Bf7 24. Bxg6 axb2 25. Bxh7+ Kh8 26. Qh6 Qa1+ 27.
>Kc2 b1=Q+ 28. Rxb1 Nb4+ 29. Kd1 1-0

This position was posted several weeks ago, and resulted in a small article by
GM Evans in Chess Life.

The original test position was to find 23.Qxe6+ with a winning score. That was
VERY difficult, and I don't know if any engine will be able to do it in under 10
minutes.

jm



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