Author: Robert Hyatt
Date: 15:22:14 07/03/03
Go up one level in this thread
On July 02, 2003 at 16:46:57, Uri Blass wrote: >On July 02, 2003 at 12:47:00, Russell Reagan wrote: > >>On July 02, 2003 at 08:33:36, Michel Langeveld wrote: >> >>>Does a (bugfree) program need 26 ply, 18 ply, or different to see that this >>>position is > 2. (normal plies, no pawn, singulair extensions). >>> >>>I think a normal ply searcher needs more as 18 ply to see in all variations that >>>the f5 or b6 goes off the board. >>> >>>How much ply does your program need? >>> >>>[D]8/k7/3p4/p2P1p2/P2P1P2/8/8/K7 w - - >> >>I believe you need 26 ply without a hash table, and 18 ply with a correctly >>working hash table. This position is usually used to test whether or not your >>hash table is working correctly. > >I believe that you cannot say how much plies a program needs without knowing the >extension and pruning rules that it is using. > >Uri I don't think he meant 26 plies of search depth. He meant 26 plies of moves. There aren't going to be any extensions in this position until a pawn gets captured, which means a depth of 26 plies is needed without some serendipitous help from hashing.
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