Author: Peter Kappler
Date: 12:49:34 05/25/00
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On May 25, 2000 at 14:17:37, Tom Kerrigan wrote: >On May 25, 2000 at 13:33:48, Ernst A. Heinz wrote: > >>>>Which reasons do you have to doubt that "Fritz 6" against >>>>itself at any same depth "X <=> X" exhibits significantly >>>>different behaviour than at depth "8 <=> 8"? >>> >>>But the same question can be asked of your experiment. >> >>There is an important difference -- in the case of "X <=> X" >>at any depth X you always pit two _identical_ opponents against >>each other which is not true for "X <=> X+1". >> >>Insisting on more than one calibration match essentially assumes >>that the Black/White behaviour of the self-playing program (i.e., >>"Fritz 6" in this case) changes with iteration depth. This might >>indeed be possible but it is so unlikely that I did not deem it >>worthwhile the effort to test. The paragraph on "Engine >>Calibration" already says so. >> >>>Why would you believe >>>that the "8 <=> 9" ply results would vary from the "11 <=> 12" ply results? >> >>I did not believe it -- that is why I ran the experiment. > >And now you do not believe that the "X <=> X" results would vary. Sounds to me >like you should test this for the same reason that you did the "X <=> X+1" test. > >-Tom I can't think of any reason why the result of X:X matches (between the same engine) would vary with depth. What could possibly cause this? --Peter
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