Author: Maurizio Di Vitto
Date: 07:50:14 12/15/03
Dear Mr Wegner, I have another doubt. I red somewhere that to know the state you have to calculate it by using an OR operation between 255 and the 8 bits interested, but if you have this situation (like all situation): 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 1 0 1 0 0 0 0 0 0 0 0 a b c d e f g h the rook is in f2, so if we want to know the state we have to shift all the bitboards of 8 units and Oring it by 255. But if we thinking about rank_attack[10(square)][181] we won’t find anything because the state 181 has the square number 10 not empty, so for that square is impossible thinking that in the same square there is another piece. So we should transform that rank in 10110001, without the rook, in this way you can have the rank situation with rank_attack[10][177].Is it right? Thanks again for your help. Maurizio Di Vitto
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