Author: Dieter Buerssner
Date: 15:40:24 07/12/04
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On July 11, 2004 at 23:15:03, Stuart Cracraft wrote: >Regarding 26 ply in Fine 70, my problem is simply that my code with >my hardware can't get there in a reasonable period of time. 4 1/2 >seconds for 21 ply won't give an answer for 26 ply for quite a long >time in my case. (22 ply = 55 seconds), 23 = 100 seconds, 24 = 123 seconds, >25 ply = 297 seconds, 26 ply = 780 seconds. And it sees the two pawns >there as you predicted. But later at the 30th ply it sees only one >pawn advantage. > >So my code must be non-optimal or the hardware is too slow or a combination. I would fear, it is the code. Many engines will solve this in a fraction of a second on modest hardware. I would suspect a (serious) problem with hashing, when seeing the times you give. There are so few pieces on the board, and much is blocked. You must get very many transpositions, and because there are few moves possible anyway (for a long time - until one pawn queens), typically engines reach depth 30 or more here extremely fast. Regards, Dieter
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