Author: Gian-Carlo Pascutto
Date: 06:18:32 12/27/01
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On December 27, 2001 at 09:14:32, Uri Blass wrote: >I know what is null move but I do not understand this output. >If 2 moves have the same score then >what is the reason that your program changes it's mind. > >If a move fail high then it means that the score is clearly >bigger than the previous score so if the previous score was >37 the new score should be at least 38 >I assume that you use integers for scores. This is what you would theoretically assume, but it does not hold in practise in a program using forward pruning (like nullmove) or finite size hashtables. It is possible to search a move and get a fail-high, then research that move and get a score lower than the one you originally failed high on. -- GCP
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