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Subject: Re: Me vs. Crafty - another lucky strike

Author: Mihaly Szalai

Date: 08:18:50 06/03/04

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On June 02, 2004 at 14:39:41, Derek Paquette wrote:

>I analyzed this game a little further, and I do not think that nxf1 is the move
>that cost the program the game,
>
>i think that 21. b5 is what costs Crafty the game, after that, all programs that
>i analyze with spike in favour of white, or equal.  Then after each move, the
>analysis runs wild,
>
>instead of 21.b5
>r1r2bk1/1pq2p1p/p1b1pPp1/3pP3/P2B4/2N4Q/1PP1B1PP/5R1K b - - 0 21
>
>
>bxa4 is much better, and things fall apart for white after that, Shredder 8 and
>Deep fritz 8 agree
>
>New game - Shredder 8, Blitz:10' home
>r1r2bk1/1pq2p1p/p1b1pPp1/3pP3/P2B4/2N4Q/1PP1B1PP/5R1K b - - 0 1
>
>Analysis by Deep Fritz 8:
>
>  ³  (-0.64)   Depth: 13/37   00:02:32  103687kN
>21...Bxa4 22.Nxa4 Qxc2 23.Nc3 Rxc3 24.Qxc3 Qxe2 25.Re1 Qg4 26.Rc1 Bh6
>  µ  (-1.16)   Depth: 13/39   00:02:51  118377kN
>21...Bxa4 22.Nxa4 Qxc2 23.Nc3 Rxc3 24.Qxc3 Qxe2 25.Re1 Qg4 26.Ra1 a5
>  µ  (-1.23)   Depth: 14/37   00:04:00  169092kN
>21...Bxa4 22.Bd1 Qc4 23.Rf4 Bc6 24.Be3 d4 25.Bxd4 Qb4 26.Rh4 h6
>  µ  (-1.16)   Depth: 15/38   00:06:13  272643kN
>
>New game - Shredder 8, Blitz:10' home
>r1r2bk1/1pq2p1p/p1b1pPp1/3pP3/P2B4/2N4Q/1PP1B1PP/5R1K b - - 0 1
>
>Analysis by Shredder 8:
>
>
>21...Bxa4 22.Bd3 Bd7 23.Rf4 b5 24.Rh4 h5 25.Rxh5 gxh5 26.Qxh5 Bc5
>  -+  (-2.06)   Depth: 18/37   00:03:27  23226kN

Hi Derek,

thanks to your 21...Bxa4! I inspected the game and found
an improvement for white one move earlier:

[D]r1r2bk1/1pq2p1p/p1b1pPp1/3pP3/P2B4/2N2B1Q/1PP3PP/5R1K w - - 0 21

21. Bd1! Bxa4 22. Nxa4 Qc4 23. Rf4 Qxa4 24. Rh4 Qa1 25. Rxh7 Qxd1+ 26. Bg1 Qh5
27. Rxh5 gxh5 28. c3 with good winning chances.

Mihaly




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