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Subject: Re: Wow.. Shredder 7.04 still stuck at 16 ply

Author: m.d.hurd

Date: 19:02:14 01/03/04

Go up one level in this thread


On January 03, 2004 at 20:54:27, William Rex wrote:

>,i - Ruffian 2.0.0
>8/PR3p2/1K2pk2/8/6p1/1B2n3/8/r7 w - - 0 1
>
>Analysis by Shredder 7.04:
>
>2.a8Q Rxa8
>  -+  (-4.91)   Depth: 1/2   00:00:00
>2.a8Q Rxa8
>  -+  (-4.91)   Depth: 1/2   00:00:00
>2.a8R Rxa8
>  -+  (-4.31)   Depth: 1/2   00:00:00
>2.a8R Rxa8
>  -+  (-3.92)   Depth: 1/2   00:00:00
>2.a8R Rxa8
>  -+  (-3.20)   Depth: 1/2   00:00:00
>2.Rb8
>  -+  (-1.67)   Depth: 1/4   00:00:00
>2.Rb8
>  -+  (-1.67)   Depth: 1/4   00:00:00
>2.Rb8 Ke7
>  µ  (-1.38)   Depth: 2/7   00:00:00
>2.Rb8 Ng2
>  =  (-0.16)   Depth: 2/7   00:00:00
>2.Rb8 Ng2 3.a8Q Rxa8 4.Rxa8
>  +-  (1.62)   Depth: 2/7   00:00:00
>2.Rb8 Rxa7 3.Kxa7
>  =  (0.08)   Depth: 3/4   00:00:00
>2.Rb8 Rxa7 3.Kxa7
>  =  (0.00)   Depth: 3/7   00:00:00
>2.Rb8 Rxa7 3.Kxa7 g3
>  =  (-0.21)   Depth: 4/15   00:00:00
>2.Rb8 Nd5+ 3.Bxd5 Rxa7 4.Kxa7 exd5
>  =  (-0.21)   Depth: 5/12   00:00:00
>2.Rb8 Ke5 3.Kc7 Rxa7+ 4.Rb7 Rxb7+ 5.Kc6 Rxb3
>  ³  (-0.46)   Depth: 6/14   00:00:00
>2.Rb8 Ke5 3.a8Q Nd5+ 4.Bxd5 Ra6+ 5.Kxa6
>  ³  (-0.46)   Depth: 6/14   00:00:00
>2.Rb8 Ke5 3.a8Q Nd5+ 4.Bxd5 Rb1+ 5.Ka6 Rb6+ 6.Kxb6
>  =  (-0.21)   Depth: 7/15   00:00:00  29kN
>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Rg8
>  =  (-0.04)   Depth: 7/17   00:00:00  37kN
>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Ra5+ Kf6 6.Ra1
>  =  (0.04)   Depth: 8/17   00:00:00  63kN, tb=10
>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Ra2 g3 6.Ra1
>  =  (-0.21)   Depth: 9/17   00:00:00  84kN, tb=13
>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Ra1 f4 6.Kc5
>  ³  (-0.52)   Depth: 9/19   00:00:00  121kN, tb=20
>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Rg8 f4 6.Kc5 f3
>  ³  (-0.37)   Depth: 10/19   00:00:01  226kN, tb=54
>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Ra1 Kd4
>  =  (-0.12)   Depth: 11/19   00:00:02  362kN, tb=106
>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Ra1 f4 6.Kc5 Ke4 7.Bxe6
>  =  (-0.04)   Depth: 11/21   00:00:02  455kN, tb=171
>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Kc5 f4 6.Re8 g3 7.Rg8 Kf5
>  =  (-0.16)   Depth: 12/21   00:00:04  675kN, tb=348
>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Rg7 Ng4 7.Bc2+ Kf4 8.Rxf7+ Ke3 9.Rf1
>gxf1Q
>  ³  (-0.41)   Depth: 13/26   00:00:07  1255kN, tb=608
>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Bc2+ Kf4 7.Bd1 Nxd1 8.Rxg2
>  ³  (-0.64)   Depth: 13/28   00:00:08  1669kN, tb=702
>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Bd1 Nxd1 7.Rxg2 f6 8.Kc5
>  ³  (-0.67)   Depth: 14/30   00:00:22  4205kN, tb=1932
>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Bd1 Nxd1 7.Rxg2 f6 8.Kc5
>  µ  (-0.75)   Depth: 15/31   00:00:37  7028kN, tb=3632
>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Bd1 Kf4 7.Kc5 f5 8.Kc6 Nxd1
>  µ  (-1.00)   Depth: 16/34   00:01:07  12475kN, tb=7175
>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Bd1 Kf4 7.Kb5 f5 8.Rxg2 Nxg2 9.Kb6
>  µ  (-1.09)   Depth: 16/35   00:01:19  15616kN, tb=8757
>
>(, none 03.01.2004)
>
>
>On January 03, 2004 at 16:44:39, F. Jermann wrote:
>
>>The following position occured in a game played yesterday by me against an ELO
>>2300 player. After almost 5 hours of fight, the move Kb6 was the last bad
>>move...
>>
>>Interestingly many engines have 'problems' to see the winning move g4! whereas
>>others find it almost immediately. Maybe a good test for 'pushed pawn' code?!
>>
>>[d] 8/PR3p2/1K2pk2/6p1/8/1B2n3/8/r7 b - - 2 53 bm g4;black wins!
>>
>>Best,
>>Frank

Hello Frank what hardware are you using ?

S7.04 on my amd 2400xp finds it fairly quick.

New game
8/PR3p2/1K2pk2/6p1/8/1B2n3/8/r7 b - - 0 1

Analysis by Shredder 7.04:

53...g4 54.Rb8 g3 55.a8Q Rxa8 56.Rxa8 g2 57.Rg8 Kf5 58.Bc2+ Kf4 59.Bd1 Nxd1
60.Rxg2
³  (-0.67)    Depth: 14/31   00:00:22  6675kN, tb=6193
(Hurd, n/a 04.01.2004)

Regards

Mike



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