Author: Uri Blass
Date: 01:59:48 08/19/03
Go up one level in this thread
On August 19, 2003 at 04:07:07, Tord Romstad wrote: >On August 18, 2003 at 19:16:51, Thorsten Czub wrote: > >>ok - i replayed the game, but on a slower machine... >> >>rebels evals in this game: > >Gothmog's evals interspersed (this time on a very fast Athlon MP 2.4 GHz): > >>move time score move >>21. 21" +0.83 Bd4 in ply 8. > >21. 4" +0.49 in ply 7 I suggest that you give it more time because it may fail high on Ba7 that is the wrong move because Rbc8 probably leads to a draw that is too deep for movei to see in a reasonable time Here is movei's analysis on Athlon 1000Mhz: depth=10 -0.05 f2d4 b4d5 h5f7 g8f7 f5f6 g7g6 g5d5 d7e6 d5a5 b8d8 f1e1 f8d6 g2g3 Nodes: 6653765 NPS: 184570 Time: 00:00:36.05 depth=10 +0.13 f2a7 b8c8 a7d4 b4d5 f5f6 d7e6 f6g7 f8e7 g5h6 c2c7 Nodes: 13410064 NPS: 188264 Time: 00:01:11.23 depth=11 +0.46 f2a7 f7f6 g5c1 c2c1 a1c1 b4d5 a7b8 e8b8 f1d1 d7c6 c1c4 e4e3 Nodes: 40042526 NPS: 189828 Time: 00:03:30.94 depth=11 +0.46 f2a7 f7f6 g5c1 c2c1 a1c1 b4d5 a7b8 e8b8 f1d1 d7c6 c1c4 e4e3 Nodes: 45778857 NPS: 191832 Time: 00:03:58.64 depth=12 +0.41 f2a7 f7f6 g5c1 b8c8 c1c2 b4c2 h5e8 c8e8 a1c1 d7a4 e2c3 a4b3 a7b6 f8d6 Nodes: 71178279 NPS: 191118 Time: 00:06:12.43 > >>22. 2'22" +1.36 (fail high!) Rac1 in ply 11. >> 3'54" +2.50 > >22. 12" +0.45 Rfc1 in ply 8. > >Rac1 is the really hard move to find. Even at ply 10, which takes about 5 >minutes >to complete, Gothmog keeps Rfc1 as its best move. The PV is 22. Rfc1 Qd3 23. >Ra3 h6 >24. Bxf7+ Kxf7 25. Qg6+ Kg8 26. Rxd3 exd3 27. Nc3 Nxc3 28. Rxc3 Re1 29. Bg1, >with a score of 0.40. Movei also does not find Rac1 in a reasonable time and prefers f6(I remember from previous analysis that it can find Rc3 easily but need minutes to find positive score at depth 11 or 12(I do not remember now) when the score was 0.00 before finding the 1.xx score. The problem was to find that Nxc3 is bad. Note that I did not implement complicated extension stuff and I prefer first to improve my pruning. Some analysis copied from winboard during writing this post: depth=10 +0.22 f5f6 g7g6 g5d5 g6h5 d5g5 g8h8 g5h5 c2b3 e2f4 f8d6 f4d5 d7c6 Nodes: 5730241 NPS: 184015 Time: 00:00:31.14 depth=11 +0.26 f5f6 g7g6 g5d5 g6h5 d5g5 g8h8 g5h5 c2b3 a4a5 f8d6 h1g1 e8g8 g2g3 Nodes: 15296240 NPS: 183540 Time: 00:01:23.34 depth=12 +0.33 f5f6 g7g6 g5d5 g6h5 d5g5 g8h8 g5h5 c2b3 e2f4 e8d8 a4a5 d7b5 f1d1 e4e3 Nodes: 33258364 NPS: 186425 Time: 00:02:58.40 depth=13 +0.27 f5f6 g7g6 g5d5 g6h5 d5h5 h7h6 f1d1 b8c8 d4e5 e8e5 h5e5 d7g4 e2d4 c2b2 Nodes: 112425992 NPS: 190226 Time: 00:09:51.01 Uri
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