Author: Robert Hyatt
Date: 12:16:30 08/16/99
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On August 16, 1999 at 15:07:59, Paul Tillotson wrote: >On August 16, 1999 at 14:00:22, Robert Hyatt wrote: > >>On August 15, 1999 at 21:16:42, Randall Shane wrote: >> >>>During my alpha-beta search, if I run out of time before I complete a iteration, >>>is it safe to just go with the move from the previous iteration?? >>> >>>What other strategies are used? >>> >>>Thanks! >> >>(a) use the best move backed up in _this_ iteration (even though you have >>not completed it) unless the score has dropped markedly from the best score >>the last iteration. In that cause, use more time. >> >>(b) use the move from the previous iteration if you haven't gotten a best move >>for the current iteration yet, unless you have failed low in the current >>iteration. In that case, use more time. > >if (a) then what would be a markedly dropped score? >Would .5 pawn or a whole pawn be in the ball park? > >Regards, >Paul Actually I have a staircase of values. I am quoting from memory (you can check time.c in crafty for actual test)... if the score drops 1/3 of a pawn, I use 2x the target time to try to 'get that positional score back.'. If I am dropping a pawn, I think I will use up to 5x the base target time. In cray blitz we were more dynamic than that, but I am not sure it was a good idea (ie positional drop = 1.5x, pawn = 2x, piece = 5x, mated= use almost all remaining time to find a way out...)
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