Author: Randall Shane
Date: 10:23:13 07/30/03
Go up one level in this thread
On July 30, 2003 at 13:09:32, Robert Hyatt wrote: > >I don't like the "illegal move" issue. How can you possibly store an illegal >move in the hash table? > >You have a good move to store if you back up a score that is > alpha, which >might mean you are backing up a PV, or a fail-high. You don't have a good >move if you are backing up alpha, because _every_ move failed low and there is >no way to know which is best... > >But storing an illegal move is something that should not happen. If you back >up alpha, set the hash move to zero. Hash collisions, maybe?
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