Author: Robert Wilkins
Date: 01:40:54 01/11/99
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On January 10, 1999 at 18:15:57, William Kerr wrote: >Normally CM6000 is very fast at finding mates during normal game playing or >position analysis. > >Here is a mate in six problem that CM6000 analyzed in infinite mode (standard >settings). Note: this is not the mate finder mode but CM6k's normal playing >engine. In this position white is to move. Normally, CM6000 solves mates very >fast up to mate in 18 assuming many move are checks. In this position, CM6000 >took 58 seconds to see the mate but when forced to move announced "MATE IN 8". >If given several minutes to analyze the problem it correctly anounced "MATE in >5". So far out of 25 or so mate in 6 problems presented to CM6000 this position >took the longest to solve in the specified number of moves. Extreme Chess did >not see any mate nor did Rebel Decade 2.0 when given more than 10 minutes to >ponder this position (mate finder mode not used). These programs were run on a >PII 300 Mhz 32 Meg hash for CM6k, default hash for Rebel Decade 2.0 and unknown >hash for Extreme (probably 24 meg). > >White to move - mate in 6 > >5N1R/5R2/5N2/K4k2/5p1p/1PB4b/2pp1P2/2bq4 w I set up this position (as above) 5N1R(rank 8) to bottom (rank 1) and my CM6000 says no mate found in about 3 secs - assume this position is correct as Caps are black.
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