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Subject: Re: Hard study for computer

Author: Joachim Rang

Date: 15:33:21 10/01/03

Go up one level in this thread


On October 01, 2003 at 10:58:41, Pierre Bourget wrote:

>White to play and win ,from the Chessbase site.
>
>[D]8/k3P3/p3K2n/1n3p2/1N4b1/1P1p1p2/8/4B3 w - - 0 1

Smarthink 0.17 need s9 seconds on my mere Athlon 1600+!

It needs some time to see that this is winning but this is nevertheless
astonishing (and SmarThink _does_ consider underpromotions). Maybe the benefit
of the new Botvinik-Makaroff-Search-Extensions?

SmarThink 017  WB1 25 MB:
D5  00:00  2,05   b4c6 a7b7 c6a5 b7b6 a5c4 b6c5 e1f2 b5d4 f2d4 c5d4 e7e8 f5f4
D5  00:00  0,00   b4c6 a7b7 c6a5 b7b6 a5c4 b6c5 e1f2 c5b4 f2e1 b4c5 e1f2 c5b4
f2e1 b4c5 e1f2 c5b4 f2e1 b4c5 e1f2 c5b4
D6  00:00  -0,01   b4c6 a7b7 c6a5 b7b6 a5c4 b6c5 e1f2 c5b4 f2e1 b4b3 c4d2 b3c2
e7e8 b5c7
D6  00:01  -4,29   b4c6 a7b7 c6a5 b7b6 a5c4 b6c5 e1f2 c5b4 f2e1 b4b3 c4d2 b3c2
e7e8 b5c7 e6d7 c7e8 d7e8
D6  00:01  -4,28   b4d3 b5c7 e6d7 f3f2 d3f2 a7b6
D6  00:01  -2,83   b4d3 f5f4 e6e5 g4h5 e5f4
D7  00:01  -2,84   b4d3 f5f4 e6e5 g4h5 e5f4 h6g8 e1f2 a7b8 f4g5 h5f7
D7  00:01  -2,97   b4d3 f5f4 e6f6 b5d6 e1f2 a7a8 e7e8 d6e8 f6g5 e8d6 g5h6 d6e4
D7  00:02  -2,96   e7e8 b5c7 e6d7 c7e8 d7e8 g4h5 e8d7 h5f7 e1f2 a7b7 b4d3 f7b3
d3c5
D7  00:02  -2,96   e7e8 b5c7 e6d7 c7e8 d7e8 g4h5 e8d7 h5f7 e1f2 a7a8 b4d3 f7b3
D7  00:02  -2,95   e1f2 a7b7 b4d3 b5c7 e6f6 c7e8 f6g6 h6g8 d3c5 b7b6 g6f7 g8f6
c5e4
D7  00:03  -2,81   e1f2 a7b7 b4d3 b5c7 e6f6 c7e8 f6g6 h6g8 d3c5 b7c6 g6f7 g8f6
c5a6 f5f4 a6b4 c6d6 f7f8
D8  00:03  -2,82   e1f2 a7b7 b4d3 b5c7 e6f6 c7e8 f6g6 h6g8 d3c5 b7c6 g6f7 g8f6
c5a6 f5f4 a6b4 c6d6 f7f8 g4f5
D8  00:04  -2,96   e1f2 a7b7 b4d3 b5c7 e6f6 c7e8 f6g6 h6g8 d3c5 b7c6 g6f7 g8f6
c5a6 f5f4 a6b4 c6d6 f7f8 g4f5
D8  00:04  -2,95   b4d3 f5f4 e6f6 b5d6 f6g5 g4f5 d3f2 h6f7 g5f4
D8  00:05  -2,65   b4d3 f5f4 e6f6 g4d7 d3e5 d7e8 e1f2 a7b7 f6g7 h6f5 g7f8 b5d6
e5f3
D8  00:09  -2,64   b4c6 a7b7 c6a5 b7b6 e1f2 b6a5 e7e8 b5c7 e6d6 c7e8 d6c5 d3d2
f2d4
D8  00:12  0,27   b4c6 a7b7 c6a5 b7b6 e1f2 b6a5 e7e8 b5c7 e6d6 c7e8 d6c5 d3d2
f2d4
D9  00:16  0,26   b4c6 a7b7 c6a5 b7b6 e1f2 b6a5 e7e8 b5c7 e6d6 c7e8 d6c5 d3d2
f2d4
D9  00:23  0,00   b4c6 a7b7 c6a5 b7b6 e1f2 b6a5 e7e8 b5c7 e6d6 c7e8 d6c5 d3d2
f2d4
D10  00:48  0,01   b4c6 a7b7 c6a5 b7b6 e1f2 b6a5 e7e8 b5c7 e6d6 c7e8 d6c5 d3d2
f2d4
D10  01:23  0,15   b4c6 a7b7 c6a5 b7b6 e1f2 b6a5 e7e8 b5c7 e6d6 c7e8 d6c5 d3d2
f2d4
D11  02:00  0,16   b4c6 a7b7 c6a5 b7b6 e1f2 b6a5 e7e8 b5c7 e6d6 c7e8 d6c5 d3d2
f2d4
D11  03:52  0,68   b4c6 a7b7 c6a5 b7b6 e1f2 b6a5 e7e8 b5c7 e6d6 c7e8 d6c5 d3d2
f2d4


regards Joachim



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