Author: James T. Walker
Date: 10:03:18 11/09/98
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On November 09, 1998 at 12:43:26, Howard Exner wrote: >Rebel 10 will play these moves at 40/2. Previous Rebels could not. > >Machine is a K6-233 in Dos mode and 60 MB hash. >Combination is off and all else at default (the default mode for Rebel 10 when >playing games). > >Initially it plays g5 (2:37) but without the correct followup in the eval, >namely d4. However it finds >d4 (4:47 - 15th ply) when that position is reached. > >These are from the game Kotov Vs Botvinnik: > >8/8/4b1p1/2Bp3p/5P1P/1pK1Pk2/8/8 b - - id end08 - Ecm98; bm g5; >8/8/4b3/2Bp2Pp/7P/1pK1Pk2/8/8 b - - id end09 - Ecm98; bm d4; > >One puzzling thing is that I double checked these positions in Windows95 mode >with >28 MB hash. The d4 move was not found in the 15th or 16th ply. I thought it was >due to >Windows but it turns out that the 60 Mb vs 28 Mb of hash somehow makes a >difference. >Why is this ? Does hash size effect the eval even when the hash is not filled >up? I don't know the answer to your question but to add to the question I have seen Fritz5 find a move in 11 plys with 100 meg of hash but when tested with only 1.4 meg of hash it found the move twice as fast(time wise) in only 10 plies ?! These chess programs are strange creatures! Jim Walker
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