Author: Robert Hyatt
Date: 13:16:01 12/08/00
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On December 08, 2000 at 13:21:21, Peter Fendrich wrote: >On December 08, 2000 at 13:06:43, Robert Hyatt wrote: > >>On December 08, 2000 at 12:56:09, Peter Fendrich wrote: >> >>>I looking for a measurement for move generation performance. >>> >>>Do you think FH/CountNodes, where FH is number of times the first generated move >>>was a Fail High, is a good measurement? >>>Do you have some other? >>>What's your figures? >>>I get some 50% and I have a feeling it's to low. >>> >>>//Peter >> >> >>The critical statistic I measure in crafty is this: "For any position where >>I 'fail high' (return a score >= beta) what percentage of the time does it >>happen on the _first_ move?" I generally average 92%. Anything over 90% is >>reasonable. Anything less means move ordering needs work. > >OK, it seems logical. I have in princple 3 types of FH: > 1) Hash table (without moving) > 2) Null Move > 3) Ordinary moves (including the hash table move) > >Do you include all these cases? >With only the third case counted I'm well over 90% > >//Peter Only 1 and 3. 2 is done at a different place in the search and doesn't really count in "move ordering". Actually, the way you wrote it, only 3 counts. for 1) you are not searching a move, so that can't be counted. 2) doesn't count either...
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