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[Daniel Shawul]

Is there a way to directly measure the number of hash collisions (not its effect). I was thinking of storing the fen along with the hash key in transposition table entry, so that if the signatures match but the fens don't it would be collision. Is there a better way ?
Edit: Right after I write this I realized storing _two_ hash keys is better than this (one could be a string hash of the fen). If the primary keys match but the second one don't it is a collision.
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