Author: Johannes
Date: 04:37:55 04/06/05
Hello! Right now im working on a new Version of my Chess Engine and an idea has come to my mind, but i dont know if its applicable: When I'm in Q-Search i only want to deal with material values. I handle theses incrementally, so theres is no need for any function call except the Q-search recursion. After returning from Q-Search (at the full-width horizon) i simply add the positional eval score to the score returned from Q-search. This score is returned "up the tree". For the positions before the horizon this should be no problem concerning alpha/beta values etc... . Also positions beyond the horizon should not suffer from this, as long as the alpha/beta values were not passed to a Node before the horizon before. If they were, the alpha/beta bounds would not be correct, because they include positional scores which are not considered beyond the horizon. So my idea is to simply substract the local positional score from the alpha/beta values (as long as they are not -INF or +INF) at the full-width horizon, before entering Q-Search. I assume that this would result in correct cutoffs. Is this idea correct? I didnt find any drawbacks yet, but i only have a vague intuition about it. I really would appreciate if anybody could help me with this. greets johannes
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