Author: Uri Blass
Date: 15:47:53 11/04/02
Go up one level in this thread
On November 04, 2002 at 18:11:59, Sune Fischer wrote: >On November 04, 2002 at 16:55:10, Uri Blass wrote: >> >>Depth 11 was finished few minutes ago and the score is very convincing. >>It seems that depth 11 is good not only to find the fail low but also to find >>the fail high for Be6 >> >>11 67 161361 228198851 c8e6 >>11 319 201885 285759097 c8e6 f4c1 c3c2 b1b2 e6c4 b2a3 c7c5 a3b2 c2d1n g1d1 b4d3 >>d1d3 c4d3 d4c5 d6c5 c1c5 d8b8 b2c3 d3e4 >> >>depth=11 +3.19 c8e6 f4c1 c3c2 b1b2 e6c4 b2a3 c7c5 a3b2 c2d1n g1d1 b4d3 d1d3 c4d3 >>d4c5 d6c5 c1c5 d8b8 b2c3 d3e4 >>Nodes: 285759097 NPS: 141545 >>Time: 00:33:38.85 >> >>Uri > >Congrats, I knew Movei could do it though :) >Your PV is 19 plies, so a bit extended. last moves are qsearch I guess that Qb8+ Kc3 Bxe4 are qsearch moves Qd4+ is not extended because movei extend checks only in the first plies of the qsearch. There is also a bug in the pv that may sometimes lead to wrong pv in the qsearch plies but I guess that it is not the case in this line >Looks like there is a knight promotion, I wonder how often these underpromotions >aren't fail lows, cause I'm thinking of removing them completely, better branch >factor and all you know... >Of couse I would keep them at the root, so as not to have a bug, what do you >think? > >-S. the knight promotion is extended like all checks but movei agree that the knight promotion is probably not the best move after more analysis. The line that was posted simply asks for extensions because there are captures and checks in it(my extensions is relatively primitive to what I should do and I should do more extensions and pruning rules but I prefer first to do other things and to make movei clean from bugs). Here is analysis that begins with 4...c5 depth=12 +6.58 c7c5 a3b2 d8b6 b2c3 c5d4 c3c4 b6b5 c4b3 c2d1q c1d1 b4d5 b3a2 d5c3 a2a3 b5a5 a3b2 c3d1 g1d1 a5c3 b2b1 c3f3 d1e1 f3g4 Nodes: 101925556 NPS: 99763 Time: 00:17:01.67 Uri
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