Author: Andrey Popov
Date: 08:39:33 09/05/03
Go up one level in this thread
On September 05, 2003 at 11:02:07, John Merlino wrote:
>On September 05, 2003 at 10:51:03, Andrey Popov wrote:
>
>>Look at the following position:
>>[D]6k1/3qppP1/b3p3/Pp1pP1PN/1PpP4/2P5/8/1BK5 w - - 0 1
>>Does your engine see the victory?
>
>Chessmaster 9000, on a P4-2.4, needs a little over 2 minutes to see the win:
>
I see. 2 minutes and only 9 plies.
However, Ruffian (the same strength) could not get the positive score during
this time. What is the reason of this strange difference?
See the Ruffian log:
6k1/3qppP1/b3p3/Pp1pP1PN/1PpP4/2P5/8/1BK5 w - -
Depth Time Score Best line
13/28 1.24 -3.37 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Ke3 Qc8 Kf4 Qd7 Bf3 f5 gxf6
exf6
13--> 1.37 -3.37 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Ke3 Qc8 Kf4 Qd7 Bf3 f5 gxf6
exf6
14/28 2.18 -3.40 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 g6 Qe8 gxf7+ Qxf7
Bd1 Qf5 Be2 Qg5+ Kc2
14--> 2.46 -3.40 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 g6 Qe8 gxf7+ Qxf7
Bd1 Qf5 Be2 Qg5+ Kc2
15/29 3.71 -3.31 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 Bd1 Qd7 Bc2 f5 gxf6
Qe8 Nf4 exf6 exf6 Qf7
15--> 4.00 -3.31 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 Bd1 Qd7 Bc2 f5 gxf6
Qe8 Nf4 exf6 exf6 Qf7
16/35 6.52 -3.31 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 Bd1 Qd7 Bc2 f5 gxf6
Qe8 Nf4 exf6 exf6 Qf7
16--> 7.06 -3.31 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 Bd1 Qd7 Bc2 f5 gxf6
Qe8 Nf4 exf6 exf6 Qf7
17/36 31.74 -3.31 Bc2 Qc6 Bd1 Qe8 Kd2 Qd8 Bc2 Qc8
17--> 32.68 -3.31 Bc2 Qc6 Bd1 Qe8 Kd2 Qd8 Bc2 Qc8
18/42 1:07 -3.31 Bc2 Qc6 Bd1 Qe8 Kd2 Qd8 Ke3 Qc8 Kf4 Qd7 Ke3 Qc6 Kd2
Qc8 Bc2 Qe8
18--> 1:12 -3.31 Bc2 Qc6 Bd1 Qe8 Kd2 Qd8 Ke3 Qc8 Kf4 Qd7 Ke3 Qc6 Kd2
Qc8 Bc2 Qe8
19/42 1:53 -- Bc2
19/43 3:28 -3.88 Bc2 Bc8 Bd1 Qd8 Kd2 Bd7 Bg4 Be8 Ke2 f5 exf6 Bxh5
Bxh5 exf6 gxf6 Qxf6 Be8 Kxg7 Bxb5 e5
19--> 3:43 -3.88 Bc2 Bc8 Bd1 Qd8 Kd2 Bd7 Bg4 Be8 Ke2 f5 exf6 Bxh5
Bxh5 exf6 gxf6 Qxf6 Be8 Kxg7 Bxb5 e5
20/43 4:26 -- Bc2
20/45 8:05 -4.31 Bc2 Qd8 Bd1 Bc8 Kd2 Bd7 Bg4 Be8 Ke2 f5 exf6 Bxh5
Bxh5 exf6 gxf6 Qxf6
20/45 9:46 x.xx Kd2
>
>Chessmaster 9000, on a P4-2.4, needs a little over 2 minutes to see the win:
>
>Time Depth Score Positions Moves
>0:00 1/8 -5.65 44032 1.Bc2 Qe8 2.Bd1 Qc8 3.Bc2 Qd8 4.g6
> f5 5.Nf4
>0:00 2/9 -5.65 57399 1.Bc2 Qe8 2.Bd1 Qc8 3.Bc2 Qd8 4.g6
> f5 5.Nf4
>0:00 3/10 -5.55 121321 1.Bc2 Qe8 2.Bd1 Qc8 3.Bc2 Qd8 4.g6
> f5 5.Nf4 Qc8
>0:01 4/11 -5.60 237325 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Be2
> Qe8 5.Bg4 Qb8 6.g6
>0:02 5/12 -5.52 590781 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Bg4
> Qc6 5.Ke3 Qc8 6.Nf4 Qa8
>0:04 6/13 -5.56 1254718 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Bg4
> Qc6 5.Ke3 Qc8 6.Kd2 Qd8 7.Nf4
>0:15 7/14 -5.45 3909511 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Bg4
> Kh7 5.Ke3 Bb7 6.Kf3 Bc6 7.Kf2 Kg8
> 8.Bf3
>0:36 8/15 -5.46 8880617 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Bg4
> Kh7 5.Ke3 Bb7 6.Be2 Kg8 7.Kd2 Bc6
> 8.Bf3
>1:58 9/16 -5.35 28593195 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Bg4
> Kh7 5.Ke3 Qc6 6.Be2 Kg8 7.Bg4 Qc8
> 8.Kd2 Qa8
>2:17 9/16 4.09 35256466 1.Nf6+ exf6 2.gxf6 Qe8 3.Kd2 Qd8
> 4.Ke3 Qxa5 5.bxa5 b4 6.cxb4 Bb5
> 7.Kd2 Ba6 8.Bc2 Bb5 9.Kc3 Ba6
>2:21 10/17 4.89 36413121 1.Nf6+ exf6 2.gxf6 Qe8 3.Kd2 Qd8
> 4.Ke3 Qxf6 5.exf6 Bc8 6.Kf4 Bb7
> 7.Kg5 e5 8.dxe5 d4 9.cxd4 c3 10.Bc2
>2:51 11/18 5.27 48709448 1.Nf6+ exf6 2.gxf6 Qe8 3.Kd2 Qb8
> 4.Ke3 Qxe5+ 5.dxe5 Bb7 6.Kd4 Bc6
> 7.Kc5 Ba8 8.Kxb5 Bb7 9.Kb6 Ba8
> 10.b5 d4 11.Ka7
>
>jm
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