Author: Amir Ban
Date: 04:19:48 01/15/98
Often when you evaluate a node, you have a situation where you can record a bigger depth in the hash entry, but the eval info is less exact. What do you do in this case ? As an example, suppose your best move was e4 up to ply 6 with value +0.10, and then at ply 6 you find d4 is better. At ply 7 d4 is still best with value +0.20. When you evaluate e4 at ply 7, you have the choice of updating e4 to 7/LE 0.20 or leave it as 6/EQ 0.10. There are advantages and disadvantages either way. Amir
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