Author: Joost Buijs
Date: 23:35:00 08/07/03
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Vincent, Have you ever tried bitboards? I agree that on a 32 bit machine it takes a tiny bit longer to generate all the moves with a bitboard engine. The whole move generation process takes ~3% from the time the engine needs to determine a move, so thats is not important at all. The evaluation fuction is much cleaner and more convenient to handle when using bitboards, probably you can gain a lot here. About two years ago I rewrote my old engine completely, and since that time it is using bitboards. I still think I made a good decision by doing so. In fact my program runs even faster after the conversion to bitboards. All other things like the search and evaluation parameters are exactly the same as in the old 1991 engine, so I am really comparing apples to apples here. B.T.W. I think the move generation is not that slow at all, for instance a perft 6 from the starting position takes here 6.24 sec. on a fast Athlon-XP, that's about 8.5 million moves/s. Can you tell me what your numbers are with respect to this? I'm really curious about this. Next year I will certainly get a dual or quad Opteron, I think my bitboard engine will really scream on such a machine. The development of my engine has been frozen for 10 year or so, simply because I was very busy doing other things. But recently I decided to start developing it further. This year I won't attend the CSVN tourney, but I certainly want to be there next spring. Groetjes, Joost
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