Author: Tom Kerrigan
Date: 10:54:09 07/15/98
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If you're searching 40k NPS, your node rate is not an immediate problem. There are many excellent programs that don't run much faster, and some run slower. As for making lots of little improvements, this is true, but only after a certain point. If you look at the situation now, your program seems to be much slower than TSCP (even though it searches more nodes per second) and TSCP doesn't use any "tricks" like null move or hash tables. I still suggest you spend a few days testing your move generator, move ordering functions, etc. to make sure everything works as expected. If the "mechanics" of your program are working well, maybe you need to examine your evaluation function. Make sure it returns the same scores for the same positions. Inconsistent scores can play hell with the search. The same goes for flipping signs, i.e., adding a term instead of subtracting it. Having a stable evaluation function is essential to speed... Cheers, Tom
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