Author: Howard Exner
Date: 20:46:36 11/16/98
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On November 16, 1998 at 23:05:49, Howard Exner wrote: >On November 16, 1998 at 03:23:54, Harald Faber wrote: > >>Hi Ed, >>I am not sure to reach you via e-mail so I write it here too: >> >>I have seen strange behaviour in Rebel10. I have AMD-K6-200 and Laptop166MMX. In >>the same position the AMD has a diiferent best move with a different value than >>the 166MMX AT SAME SEARCH DEPTH. How is this possible, any explainations? > >I'm noticing something similar when even using the same machine with the >exact same settings. I tried this with the following position from the >BS2830 test suite. > >r4r1k/pbnq1ppp/np3b2/3p1N2/5B2/2N3PB/PP3P1P/R2QR1K1 w - - id BS2830.EPD; bm Ne4; > >The settings for Rebel 10 on my K6-233 were AntiGm=Smart, Combination=Off, >Selection=N and PlayStyle=N. The method I used was to play the position >in infinite mode, force the move after about 60 seconds, record the PV >results, takeback the move and then go through the process from the start. > >For 12 takebacks Rebel 10 played the moves in this order: >ST,A,A,ST,A,A,ST,A,ST,ST,A,ST. (ST means that Rebel 10 played the move >by setting itself to think in AntiGM=Strong, while A means REbel 10 chose for >itself AntiGM=Active). Note that the entire time I am using Anti=GM set to Smart >for the entire test procedure. > >This is definitely not making Rebel 10 deterministic when AntiGM is set to >Smart. Does this mean that when AntiGM is set to smart that different test >suites will have varying solution times based on what the Smart setting decides >among the three Choices of Strong, Active or Smart? correction here It should read ... three choices of Strong, Active or Off? > >My question is why is Rebel 10 chosing different AntiGM settings for completely >identical positions with the exact same settings? Should Smart mean the >ability to somehow assess the position and then decide on what AntiGM path >to follow? > >For my own testing and playing against Rebel 10 I'm using AntiGM=Strong, >Combination=Off, Selection=N (except for some middlegame testing when at >times I use Selection = 4), and PlayStyle = Agressive.
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