Author: Robert Hyatt
Date: 07:44:50 12/19/03
Go up one level in this thread
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. The problem is that there _is_ a risk. IE chess positions can be compressed to just over 160 bits. Using 128 bits means you still have a very large many-to-one mapping (2^32 to 1 in fact.) That looks very risky, as you are trying to produce numbers that will be _perfect_ not "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. > >/Regards Albert
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.