Author: Vincent Diepeveen
Date: 05:39:13 09/09/01
Go up one level in this thread
On September 08, 2001 at 23:18:09, Robert Hyatt wrote: >On September 08, 2001 at 14:02:41, Vincent Diepeveen wrote: > >>On September 08, 2001 at 13:53:03, K. Burcham wrote: >> >>Yes it had to, because it was a preprocessor program, >>perhaps it didn't clear 'best move' entries in the software. > > >This is not a given. You can be a pre-processor without clearing the hash >between _every_ pair of moves. You only need to clear the hash scores if you >change some of the evaluation weights. Nothing says a pre-processor has to >do this after each move. Early versions of crafty did some pre-processing, but >only at two distinct places in the game, namely on the transition between >opening to middlegame and middlegame to endgame. That resulted in _exactly_ >two hash table clear operations in a game. I see no reason why your assumption >has to be valid at all. the important thing is that it didn't use hashtables at all in hardware and that it of course couldn't use transposition entries from a previous search. Obvoiusly you don't need to clea rit, but practically it comes down to the same thing. If you can't use search scores from a previous search, then in human eyes it is completely justified to say that this sucks bigtime! > > >> >>Note that it didn't use hashtables onboard of each hardware >>cpu either. >> >>> >>> >>> >>> >>>i assume deep blue had some type of memory storage for eval >>> of previous lines searched. if it did are you saying that >>> deep blue cleared its memory (hash), with each move? >>> >>>if it did not clear its memory with each move then your seven >>> second search limit does not make sense to me. >> >>>and can you tell me which game this move was taken from, so that i >>> can get a better analysis of this position. i can find it, but you >>> can save me a lot of time, if you will. >>> >>>i will post my results after the analysis of this position. >>> >>>kburcham
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