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Subject: Re: Kings attack / Piece sacrifice

Author: Anthony Cozzie

Date: 16:54:24 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

Zappa (2x1.8 Opterons) needs 12 seconds for Bxg6, but showing a positive score
is difficult:

1. Bd3xg6++
 + (-5.32)	Depth: 11/26	00:00:11.90	13242kN (1113 KN/s, 650 splits, 40 aborts)
1. Bd3xg6 Bf7xe6 2. Bg6xh7 Kg8-h8 3. Bh7-d3 Rf8xf4 4. Rd1-h1 Be6-h3 5. Rg3xh3
Be7-h4 6. Rh3xh4 Rf4xh4 7. Rh1xh4 Kh8-g8
 = (-2.06)	Depth: 11/27	00:00:15.33	17551kN (1144 KN/s, 666 splits, 45 aborts)
1. Bd3xg6 Bf7xe6 2. Bg6xh7 Kg8-h8 3. Rd1-h1 Be7-h4 4. Bh7-d3 Rf8xf4 5. Nf3xh4
a3-a2 6. Nc3xa2 Qa5-e1 7. Rh1xe1 Rf4xh4 8. Bd3-a6
 = (1.96)	Depth: 16/34	00:07:05.62	561276kN (1319 KN/s, 1572 splits, 121 aborts)

anthony



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