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Subject: PVS & Hashing

Author: Alex Boby

Date: 13:37:15 04/21/01



My PV search uses the assumption that when the minimal window search fails high,
then the score returned is at least as high as the true score which will be
returned when you search again with a wider a/b window.

All was fine and dandy before hashing. Now I'm experiencing problems where this
assumption is incorrect because the score from the minimal window search was
returned via a hash table hit which was overwritten before the research takes
place. So the research doesn't return a score >= min window score.

And so I'm unsure about how to deal with the PV search now when the base
assumption for that technique is invalid.

Any suggestions are greatly appreciated :)

Alex Boby



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