Author: Uri Blass
Date: 12:15:33 07/12/02
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On July 12, 2002 at 14:56:11, Ed Schröder wrote: >Hi CCC, > >In Rebel I maintain a statistic file, on every iteration a counter is >incremented with 1 (see column 2) representing the iteration depths Rebel has >searched. When a new best move is found a second counter is incremented with 1 >(see column 3) representing how many times a new best move has been found on the >given iteration depth, between brackets the percentage is calculated. > >As you can see the very first plies Rebel often changes to new best moves, >however when the depth increases and increases the chance Rebel will change its >mind drops and drops. From 16 plies on the chance a new better move is found is >below 2%. I think that one of the reason is that not all the positions are searched to depth 16 and the positions that are searched to this depth are not random positions. I guess that you are going to see clearly more than 2% changes if you search every position to depth 16 (I guess 10-15%). I say it based on my experience in correspondence games when computers clearly change their mind at big depth in clearly more than 2% of the cases. It may be interesting if you give Rebel the time to search all the 113768 positions to depth 16(you can save time by not searching moves when there is a forced move but these cases are probably less than 10% of the cases). If you do not have enough computer time to do it then maybe you can give the job to beta testers and if you do not have the time to do it then I suggest that you choose 1000 random numbers between 1 and 113768 and analyze 1000 positions based on the random numbers. Uri
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