Author: Nicolas Carrasco
Date: 10:47:18 09/23/99
Go up one level in this thread
I will do that! On September 23, 1999 at 13:18:59, Bruce Moreland wrote: >On September 23, 1999 at 10:04:46, Jaime V. wrote: > >>On September 23, 1999 at 01:16:16, Nicolas Carrasco wrote: >> >>>Hi, >>> >>>I had implemented MIN-MAX succesfuly and deleted the slow MIN-MAX and put Alpha >>>Beta exactly as I have on a magazine I have bought called "Solo Programadores" >>>Number 37. And as is on most sites. My MIN-MAX function finds me a move that my >>>evalation function scores 20 and Alpha Beta other that scores 16. >>> >>>It is natural? >>>I am doing something wrong? >>> >>>Thanks! >>> >>>PS: Don´t forget to visit my website that I completly changed yesterday. >>> UruChess Official Web Site http://www.puntadeleste.to/uruchess/ >> >>Hello >> >>I think Alpha beta prunning only return values between Alpha Beta limits. The >>lower value can be returned is Alpha. >>Any value under the Alpha limit will be cut off. >> >>Is your alpha (beta) value 16 or similar? > >At this point he should be feeding in an initial window of -32767, +32767, >assuming that all possibly eval values will fit between those two values. > >Alpha-beta is still efficient with a wide window and it should be impossible for >it to return a value that's not the same as min-max. > >Alpha-beta can affect a finished chess program, but that's because of forward >pruning, mistaken pruning due to hash table elements, and the like. > >bruce
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