Author: Robert Hyatt
Date: 20:56:13 02/08/00
Go up one level in this thread
On February 08, 2000 at 23:17:08, Dann Corbit wrote: >On February 08, 2000 at 22:13:58, Peter W. Gillgasch wrote: > >>On February 08, 2000 at 20:11:50, Dann Corbit wrote: >> >>>2bnN1k1/6P1/4p3/1P2N1P1/3K4/8/8/8 w - - >> >>Including producing a full blown log file with an awful lot of >>statistics it took 2 seconds on my 60 mhz PowerPC601 machine. >>Iteration 7, 43914 nodes, minimal hashtable (128 K entries). >>This time includes clearing the hash table. >> >>Without the hash table it took 3 seconds, iteration 7, 77162 >>nodes. I believe that things like these can be solved easily >>much faster with better selectivity. >> >>Is there anything special about that problem ? > >Nothing that I can see. Crafty finds the right move in less than two seconds, >but fails to see the mate for 6 minutes. Looks like a bug or ??? Just the check extension, the one reply to check extension, both adding up and blowing the search up badly. I simple probe showed lots of searches well beyond 30 plies...
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