Author: Howard Exner
Date: 22:58:34 01/21/01
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On January 22, 2001 at 00:45:09, Howard Exner wrote: >On January 21, 2001 at 19:59:54, James T. Walker wrote: > >>I get almost the identical thing on my Athlon 900Mhz. I measured it to be >>almost 2.5x faster than a K6-2-450. My machine always finds d6 at 1:25 and >>plays 12....d6 at 1:48 (set for 40/1hour). Perhaps it was accidentally forced >>to move early? In any case it is strange that Century would even consider such >>a move. But it's not the only strange move I've seen Century make. >>Jim > >To confirm your findings I followed the idea of manually playing Deep Fritz's >moves. Then let Rebel think and enter its own choices at 40/1:00 tournament >mode, like you on an Athlon 900. For Fritz I entered the moves immediately until >it went out of book on move 12. Here the log file had Deep Fritz moving >Nf3 after 193 seconds so I entered the move at 90 seconds to compensate for the >machine differences. Sure enough Rebel played not Rg8 but d6. It had O-O way >down on the 18th iteration. > >To more accurately discover what the auto/manual inconsistency is, a 40/2 manual >input of Fritz's moves, using identical times as the pgn, on a 450 AMD through >DOS is required. DOS because that is what SSDF is using for Rebel. Tried the same experiment on my K6-2 500 under windows. Mimicing Fritz's moves and times it took to play these moves on move 12 Rebel plays d6. The original pgn file states that Rebel plays Rg8, using a total of 381 seconds. Manually on my machine it plays d6 using a total of 476 seconds. Another entry that looks suspect is Rebel's move 10. Not so much the move chosen of Nc6, but the time used to play this first move out of Rebel's book ... 281 seconds. That seems too short a time for Rebel out of book as typically it takes a good amount of time to enter an initial out of book move. On the K6-2 500 for example it actual plays d6 on move 10 using 476 seconds. This supports the theory that some auto232 oddity is interupting Rebel's thought process and making it move before it is ready. As Jeff pointed out also. The parameter that makes Rebel move quicker, as in the last three Van der Wiel games, is not used in SSDF is it? In any case duplicating how it plays with auto232 on Tony's 450 versus manual is difficult since I do not have the exact machine and settings that he has.
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