Author: Steve Maughan
Date: 14:51:03 12/31/00
Go up one level in this thread
Heiner, >>As an example, suppose that initially Alpha = 1.00, Beta = 5.00 . From the >>hash we find a deeper search with a lower bound of 3.00. It is possible that >>had we not changed alpha and after the node has been searched the score for >>this node would be +2.00 and it could have formed part of the PV. The key here is that the hash info pertains to a _deeper_ search. >I don't follow here: you just stated that the TT says "this node's value >(for this depth) No not for this depth but for a deeper search. >is 3.00 or even higher". And we are trusting the statements >from the TT, right? At a depth greater than the current search depth the value is indeed +3.00 or higher but at the current depth it could be below this value (e.g. +2.00) and this could still justify being part of the PV. >So, we expect a search here to not return anything below 3.00, especially not >2.00 as value. At a 'shallow' depth it could be +2.00 Regards, Steve
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