Author: Heiner Marxen
Date: 09:21:10 01/03/01
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On January 03, 2001 at 09:25:29, leonid wrote: >On January 02, 2001 at 21:22:01, Dann Corbit wrote: >>Under standard chess, it is a mate in 11 (as shown above correctly by Chest). > >Is is still pretty good. Search by brute force 11 moves deep should take pretty >long time to solve. It probably used some kind of selective search and >successfully. K6-2/400 with 10MB hash: 374 sec PIII/550 with 30+MB hash: 177 sec Speed factor for hash (transposition table): 35.6 (conservative estimate). You should really use a transposition table for positions with so few pieces, it makes a great difference (hint, hint :-). More memory then also helps. Here are the move execution counts for the different levels (depth in moves): mvx 11: 18 22 [18.000 1.222] mvskip lvskip mvx 10: 468 216 [21.273 0.462] mvx 9: 5121 1400 [23.708 0.273] 79 mvx 8: 29838 5123 [21.313 0.172] 1088 1 mvx 7: 85729 13523 [16.734 0.158] 4948 45 mvx 6: 211779 35455 [15.661 0.167] 15705 103 mvx 5: 512410 96046 [14.452 0.187] 62779 368 mvx 4: 1325249 303453 [13.798 0.229] 171602 1027 mvx 3: 3751315 1617681 [12.362 0.431] 459 1 mvx 2: 2386674 1787280 [ 1.475 0.749] mvx 1: 56337 0 [ 0.032 ] In [..] you find the quotients between successive plies. (EGTBs are even better, of course) Heiner
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