Author: Uri Blass
Date: 12:05:12 12/03/02
Go up one level in this thread
On December 03, 2002 at 00:48:48, Anthony Cozzie wrote: >>>>>How long do your engines need to find Nc6! with a huge white advantage (at least >>>>>+2)? >>>>>[D] kb2r1qr/pp3b2/1p2p3/1Pn1pp1n/R2N2pP/1PN1BPP1/4PQB1/R4K2 w - - 0 1 > >>Even depth 13 after Nc6 is not enough for latest movei to see more than +2 for >>white so I guess that it needs at least depth 15 from the root position that may >>mean many hours. >> >>depth=13 -1.85 c5a4 c3a4 b7c6 b5c6 b8c7 a4b6 c7b6 e3b6 h5g3 f2g3 e8e7 c6c7 a8b7 >>f3g4 b7b6 g3e3 b6c7 a1a7 c7d8 e3b6 d8c8 a7a8 c8d7 a8g8 h8g8 >>Nodes: 314049824 NPS: 132147 >>Time: 00:39:36.51 >> >>Uri > >don't feel bad uri. At depth 15 zappa goes nuts (I'm 90% sure this a hashtable >problem). It'd probably take a 16 ply search to see a large white advantage. For movei(PIII850,64 mbytes hash) depth 14 is enough to see big advantage but less than +2 and the time is not very good. depth=14 +1.85 d4c6 c5a4 c3a4 b7c6 b5c6 b8c7 a4b6 c7b6 e3b6 h5g3 f2g3 e8e7 c6c7 a8b7 f3g4 b7b6 g3e3 b6c7 a1a7 c7d8 e3b6 d8c8 a7a8 c8d7 a8g8 h8g8 Nodes: 3617619527 NPS: 129847 Time: 07:44:20.52 I do not know the exact time to see positive score because I did not save the analysis but it was certainly at least some hours. Uri
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