Author: Robert Hyatt
Date: 06:43:43 01/06/04
Go up one level in this thread
On January 05, 2004 at 16:50:59, Uri Blass wrote: >On January 05, 2004 at 16:39:04, Uri Blass wrote: > >>I see that crafty is using swap_list[32] and I think that the array is too long. >> >>There are only 8 queen directions and 8 knight directions and I think that for >>practical cases swap_list[16] can make Crafty faster with no problems(in theory >>it is possible that 16 is not enough but I do not imagine a practical case when >>it can happen. >> >>I wonder if it is not better to have swap_list[16] in Crafty and add >>if (nc==15) break if you want to be careful not to crash maybe in 1 out of 1000 >>games. >> >>It seems to me that the price of allocating memory to 16 integer is higher than >>the price of one if (nc==15) inside the loop. >> >> >>Another point that I see is that it is using the value of the pieces and does >>not use piece square table. >> >>I wonder if there is a reason not to use piece square table to evaluate capture >>of pawn in the 7th as better than capture of pawn in the second rank. >> >>Uri > >Another idea is to have a small array in swap( even of only 8 elements) and only >in the rare cases when crafty see that the small array is not enough to call >bigswap for more than 8 elements. > >Uri I'm not sure what this would help. I don't use the entire 32 elements unless there are that many captures to deal with...
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