Author: Uri Blass
Date: 08:55:33 01/24/04
Go up one level in this thread
On January 24, 2004 at 11:42:29, Uri Blass wrote: >On January 24, 2004 at 10:41:51, Evgeny Shu wrote: > >>add [D] before the FEN representation of the position : >>[D] 1nrrb2k/pp3ppp/nq2p3/3pP2P/3P1NP1/1BP5/PP2QP2/K5RR w - - > >As I reported in the winboard forum movei(p850,16 mbytes hash) fails high at >depth 16 on g5 and it may get a positive score after solving the fail high but I >decided to stop the search so you are not going to know if movei can find a >positive score. > >It is clear that I need to do it better in tactics in order to find the fail >high faster. > >depth=16 -0.50 e2f3 b8d7 h5h6 g7g6 f4h5 f7f5 g4f5 g6f5 g1g7 e8g6 h5f4 d7f8 f4d5 >e6d5 b3d5 f8e6 g7b7 >Nodes: 522753619 NPS: 158874 >Time: 00:54:50.36 > >depth=16 -0.49 g4g5 >Nodes: 1105457953 NPS: 158643 >Time: 01:56:08.18 > >depth=16 -0.20 g4g5 >Nodes: 1885168420 NPS: 158753 >Time: 03:17:54.78 > >Uri For comparison Fritz can see a positive score in a few minutes New game 1nrrb2k/pp3ppp/nq2p3/3pP2P/3P1NP1/1BP5/PP2QP2/K5RR w - - 0 1 Analysis by Fritz 8: 1.h6 g6 2.Qf3 Kg8 3.g5 Nc7 µ (-1.09) Depth: 7/16 00:00:00 29kN 1.g5! µ (-1.06) Depth: 7/20 00:00:00 52kN 1.g5! µ (-0.91) Depth: 7/20 00:00:00 69kN 1.g5 Nc7 2.g6 h6 3.Qg4 fxg6 4.hxg6 Kg8 5.Qh5 µ (-0.72) Depth: 8/22 00:00:00 208kN 1.g5 Nc7 2.g6 fxg6 3.Qg4 Kg8 µ (-0.78) Depth: 9/26 00:00:01 464kN 1.g5 Nc7 2.Qf3 Kg8 3.Bc2 Bb5 4.g6 fxg6 5.hxg6 h6 6.Qh5 µ (-0.72) Depth: 10/29 00:00:03 1129kN 1.g5 Nc7 2.Qf3 Kg8 3.Bc2 Bb5 4.g6 fxg6 5.Qg3 Bc4 6.hxg6 µ (-0.75) Depth: 11/30 00:00:06 2585kN 1.g5! ³ (-0.47) Depth: 12/34 00:00:23 9462kN 1.g5! = (-0.19) Depth: 13/36 00:01:24 34882kN 1.g5! = (0.09) Depth: 14/37 00:04:02 101202kN As you see from the last lines fritz8 finds it only by intuition when it does not calculate lines after g5:_( seriously it is one of the things that I dislike about Fritz. Uri
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