Author: Severi Salminen
Date: 13:56:11 03/02/01
Go up one level in this thread
>>Yep, that's true. As Bob said it is very rare to have beta=INF. Actually >>Beta=INF can occur only in the very beginning of the search until we get our >>first real score (score<=INF-Ply). Remember also that you don't have to know >>anything else about the nullmove but whether its score is >=beta. So you can >>search with (-beta,-beta+1) >> >An idea I had, is that since about half the time we expect a move to fail low, >it doesn't make much sense to give the opponent an extra move and expect it to >fail high. Well, the point is: how do we know it _before_ trying the null move? Futility (pre) condition is one good indicator: if(depth==1&&material+MARGIN<=alpha). Severi
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