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Subject: Re: Can any engine with book off do a better job than Shredder at diagnosing

Author: Dan Ellwein

Date: 11:15:58 04/20/04

Go up one level in this thread


On April 20, 2004 at 13:28:40, Dann Corbit wrote:

>On April 19, 2004 at 21:56:15, Dan Ellwein wrote:
>
>>On April 19, 2004 at 13:49:12, Dann Corbit wrote:
>>
>>>... this position from the Evans Gambit?  Shredder has reduced the score to 0.13
>>>pawns and most engines I tried were much farther away from the true value.
>>>
>>>On the other hand, all the engines I did try eventually start a slow march
>>>downward with the score.  Some are wildly optimistic (thinking at first that
>>>they are two pawns ahead).
>>>
>>>[D]r1bqk1nr/pppp1ppp/2n5/b7/2BpP3/2P2N2/P4PPP/RNBQ1RK1 b kq - am dxc3; bm Nge7;
>>>
>>>Analysis from E:\tough.epd
>>>4/17/2004 12:04:45 AM Level: 40000 Seconds
>>>Analyzing engine: Shredder 7.04 UCI
>>>
>>>1) Nge7;
>>>    Searching move: Ng8-e7
>>>    Best move (Shredder 7.04 UCI): d4xc3
>>>    Not found in: 11:06:40
>>>    2   00:00  0.53   Ng8f6 Nf3g5
>>>    3   00:00  0.63   Ng8f6 e4e5 d7d5 e5xd6/ep Qd8xd6 c3xd4
>>>    4   00:00  0.37   Ng8f6 c3xd4 Nf6xe4 Bc1a3
>>>    4   00:00  0.49   d4xc3 Qd1b3
>>>    5   00:00  0.49   d4xc3 Qd1b3
>>>    6   00:00  0.49   d4xc3 Qd1b3
>>>    6+  00:00  0.50   Ng8f6 e4e5 Nf6e4 Bc1a3 Ne4xc3 Qd1xd4 Nc6xd4
>>>    6   00:00  0.51   Ng8f6 Nf3xd4 Nc6e5 Bc4b3 Nf6xe4 Rf1e1
>>>    7   00:00  0.52   Ng8f6 e4e5 Nf6e4 Qd1b3 00 c3xd4 d7d6
>>>    8   00:00  0.67   Ng8f6 Nf3xd4 00 Bc1a3 Rf8e8 f2f3 d7d6 Nd4xc6 b7xc6
>>>    9   00:01  0.45   Ng8f6 e4e5 d7d5 Bc4b5 Nf6e4 Bb5xc6+ b7xc6 Qd1a4 Ba5xc3
>>>Nb1xc3 Ne4xc3 Qa4xc6+ Bc8d7
>>>    9   00:01  0.49   d4xc3 Qd1b3
>>>   10   00:01  0.49   d4xc3 Qd1b3
>>>   11   00:01  0.49   d4xc3 Qd1b3
>>>   12   00:02  0.49   d4xc3 Qd1b3
>>>   13   00:04  0.49   d4xc3 Qd1b3
>>>   14   00:06  0.49   d4xc3 Qd1b3
>>>   15   00:12  0.49   d4xc3 Qd1b3
>>>   16   04:19  0.48   d4xc3 Qd1b3 Qd8f6 Bc1g5 Qf6g6 Nb1xc3 Ng8f6 Bg5xf6 Qg6xf6
>>>Nc3d5 Qf6d8 Qb3a3 d7d6 Nf3d4 Nc6xd4 Qa3xa5
>>>   17   12:52  0.49   d4xc3 Qd1b3 Qd8f6 Bc1g5 Qf6g6 Nb1xc3 Ng8f6 Bg5xf6 Qg6xf6
>>>Nc3d5 Qf6d8 Qb3a3 d7d6 Bc4b5 00 Bb5xc6 b7xc6 Qa3xa5
>>>   18   23:07  0.35   d4xc3 Qd1b3 Qd8f6 Bc1g5 Qf6g6 Nb1xc3 Ba5xc3 Qb3xc3 Ng8f6
>>>Ra1e1 00 Bc4d3 h7h6 e4e5 Nf6d5 Qc3c2 Nd5b4 Bd3xg6 Nb4xc2 Bg6xc2 h6xg5
>>>   19   47:27  0.35   d4xc3 Qd1b3 Qd8f6 Bc1g5 Qf6g6 Nb1xc3 Ba5xc3 Qb3xc3 Ng8f6
>>>Rf1e1 00 Bc4d3 h7h6 e4e5 Nf6d5 Qc3c4 Nd5b6 Qc4c2 Qg6h5 Bg5h4
>>>   20   1:45:35  0.34   d4xc3 Qd1b3 Qd8f6 Bc1g5 Qf6g6 Nb1xc3 Ba5xc3 Qb3xc3 Ng8f6
>>>e4e5 Nf6e4 Qc3e3 00 Bc4d3 d7d5 e5xd6/ep Rf8e8 Rf1e1
>>>   21   3:55:11  0.26   d4xc3 Qd1b3 Qd8f6 Bc1g5 Qf6g6 Nb1xc3 Ng8f6 e4e5 d7d5
>>>e5xf6 d5xc4 Rf1e1+ Ke8f8 Qb3b2 h7h6 Nc3d5
>>>   22   9:19:02  0.13   d4xc3 Qd1b3 Qd8f6 Bc1g5 Qf6g6 Nb1xc3 Ba5xc3 Qb3xc3 Ng8f6
>>>e4e5 Nf6e4 Qc3e3 00 Bc4d3 f7f5 e5xf6/ep d7d5 f6xg7 Rf8f7 Ra1b1
>>>   4/17/2004 11:11:33 AM, Time for this analysis: 11:06:42, Rated time: 11:06:40
>>>
>>>0 of 1 matching moves
>>>4/17/2004 11:11:34 AM, Total time: 11:06:48 AM
>>>Rated time: 11:06:40 = 40000 Seconds
>>
>>hi Dann
>>
>>CM9_OffSet after 5 hours of analyzing likes dxc3...
>>
>>P3/850
>>
>>
>>Time	Depth	Score	Positions	Moves
>>----	----	----	----		----
>>0:00	1/3	-2.36	1834		1...dxc3 2.Qd5 Qe7 3.Be3
>>0:00	1/4	-2.50	8827		1...dxc3 2.Qd3 Qf6 3.Bg5
>>0:00	1/5	-1.97	32451		1...dxc3 2.Qb3 Nf6 3.Nxc3 O-O
>>0:01	1/6	-1.89	90736		1...dxc3 2.Qb3 Nf6 3.Nxc3 Bxc3
>>					4.Qxc3 O-O 5.Bb2 d6
>>0:02	1/7	-1.84	175431		1...dxc3 2.Qb3 Qf6 3.Bg5 Nd4 4.Nxd4
>>					Qxg5 5.Bxf7+ Kf8 6.Bxg8 Rxg8 7.Nxc3
>>0:05	1/8	-1.89	457273		1...dxc3 2.Qb3 Nf6 3.Nxc3 Bxc3
>>					4.Qxc3 O-O 5.Bb2 d6 6.Rab1 Be6
>>0:15	1/9	-1.89	1405639		1...dxc3 2.Qb3 Nf6 3.Nxc3 Bxc3
>>					4.Qxc3 O-O 5.Bb2 d6 6.Rab1 Be6
>>1:08	1/10	-2.19	6167860		1...dxc3 2.Qb3 Nf6 3.Nxc3 Bxc3
>>					4.Qxc3 O-O 5.e5 Ne4 6.Qe3 d5 7.Ba3
>>					Re8
>>3:26	1/11	-2.19	19312997	1...dxc3 2.Qb3 Nf6 3.Nxc3 Bxc3
>>					4.Qxc3 O-O 5.e5 Ne4 6.Qe3 d5 7.Ba3
>>					Re8
>>11:02	1/12	-2.22	63873458	1...dxc3 2.Qb3 Nf6 3.e5 d5 4.exf6
>>					dxc4 5.fxg7 Rg8 6.Re1+ Ne7 7.Qxc4
>>					Be6 8.Qa4+ Nc6
>>34:32	1/13	-2.21	203738773	1...dxc3 2.Qb3 Nf6 3.e5 d5 4.exf6
>>					dxc4 5.fxg7 Rg8 6.Re1+ Ne7 7.Qa3
>>					b6 8.Bg5 Be6 9.Bf6
>>1:22:37	2/14	-2.11	509390720	1...dxc3 2.Qb3 Nf6 3.e5 d5 4.exf6
>>					dxc4 5.fxg7 Rg8 6.Re1+ Ne7 7.Qa3
>>					b6 8.Bg5 Be6 9.Bf6 c2 10.Nc3 c5
>>5:32:29	3/15	-2.08	1818812313	1...dxc3 2.Qb3 Nf6 3.e5 d5 4.exf6
>>					dxc4 5.fxg7 Rg8 6.Re1+ Ne7 7.Qa3
>>					b6 8.Bg5 Be6 9.Bf6 Qd6 10.Qa4+ Bd7
>
>Here, it is clear that the default version understands this position and
>CM9_OffSet does not.

yes, Dann, agree...





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