Author: Steffen Jakob
Date: 04:56:23 12/19/03
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On December 19, 2003 at 02:44:44, Albert Bertilsson wrote: >Hi! > >Hashing with 64bits is really quite good, even 56bits should be no problem for >chess if the machine is not terribly fast, the game is very long and the hash >table is really big. To be on the safe side I used 128bit keys, that is a really >long number, not enough to store all the possible chess positions but quite >close. > >I do not consider this a problem, a much bigger problem is the possibility of >someone cheating or an unstable computer doing a misscalculation. You could use a 64 bit hash key and additionally store the complete position with 21 bytes (see http://www.talkchess.com/forums/1/message.html?337026) in the hash table entry for confirmation. This slows things down of course but I think you still will get a speedup compared to not using a hash table at all. Greetings, Steffen.
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