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Subject: Re: Cute Rook sacrifice by Rybka

Author: Stuart Cracraft

Date: 10:55:25 12/27/05

Go up one level in this thread


On December 26, 2005 at 08:36:35, Albert Silver wrote:

>This position and combination took place in a match against Junior 8:
>
>[D]2r3k1/2qb4/p3prp1/3p2b1/1B1P2P1/1Q6/1P2NPK1/3RR3 b - - 0 32
>
>As a human, being told "Black to play and win" makes finding the key move very
>easy, so all I can suggest is to try and work out the correct follow-up.
>
>Some engines shuld have more trouble than others on this all the same. At least
>according to some preliminary checking I did. On my computer, Rybka spotted it
>in 5 seconds BTW.
>
>                                         Albert

My program is too poor to "get it":

Alpha=-394 Beta=406 Maxdepth=9999999 MaxTime=99900 xboard=0
Itr/Max Mv   Time   Score Nodes PV
 1/ 4  a6a5 6  0.00       55 a6a5
 2/ 5  c7c4 6  0.00      547 c7c4 b3c4 d5c4
 3/ 9  c7c2 6  0.04     3650 c7c2 b3c2 c8c2 d1b1
 4/16  c8b8 6  0.10    18583 c8b8 d1d3
 5/16  c8b8 6  0.20    44271 c8b8 e1f1 c7c4 b3c4 d5c4 d1b1
 6/19  g5h4 20  1.54   370363 g5h4 e1f1 c7b6 d1b1 c8b8 f2f4
 7/21> g5h4 420  1.94   465288 g5h4 e1f1 c7b6 d1b1 c8b8 f2f4 a6a5
 7/28  g5h4 980  5.33  1246768 g5h4 e2g3 f6f4 b3d3 f4g4 d3a6 h4g3 f2g3 g4g3 g2f2
 8/28  d7b5 1018 20.99  5050579 d7b5 b3g3 c7g3 g2g3 c8c2 e2g1 f6f2 g1f3 f2g2
g3h3 g5f4 b4c3
 9/29  d7b5 1032 45.42 10996834 d7b5 b3g3 c7g3 e2g3 c8c2 g3h1 b5e2 b4e7 e2d1
e7f6
10/33  d7b5 1006 128.85 31370163 d7b5 b3g3 c7g3 e2g3 c8c2 g3h1 b5e2 d1b1 f6f4
h1g3 e2f3 g2g1 f3g4
11/



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