Author: Les Fernandez
Date: 15:03:03 01/28/02
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On January 28, 2002 at 17:55:24, Scott Gasch wrote: >On January 28, 2002 at 17:48:48, Les Fernandez wrote: > >>Just curious to know what is the best being done now for storing a chess >>position. In the worse case scenario (castling right exists) it takes me 162 >>bits to store 32 pieces, color, location, side to move, castling, enpassant, >>promotion, ce and pv. Now if castling rights do not exist then the worse case >>scenario for the above is 81 bits. Much further reduction in bits/position is >>possible but at the moment I am interested in the above. >> >>Thanks in advance, >> >>Les > >How can you have a 162 bit requirement with castling rights and a 81 bit >requirement without castling rights? You're telling me you need 81 bits to >store castling information? Here's a breakthrough for you: > >0000 = no castling possible >0001 = white can castle short >0010 = white can castle long >0100 = black can castle short >1000 = black can castle long >1111 = all castling possible > >Scott I am aware of how many bits you need for castling. I did not say I needed 81 bits for castling I merely said that in positions that have no castling rights that I need only 81 bits to store the position. Before you challenge my bits needed to store castling rights you might be more interested to know how does one store the entire position using only 81 bits <S>. Thanks
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