Author: Robert Hyatt
Date: 17:03:28 01/16/03
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On January 16, 2003 at 17:01:29, David Rasmussen wrote: >On January 16, 2003 at 16:48:22, Robert Hyatt wrote: > >> >>See my response earlier. With 8-9 pieces on the board, you are doing a >>worst-case >>test, as many lines will turn into a probe. With more pieces, this tapers off. >>And, of >>course, if you are in a game, the cache gets "seeded" slowly so that the >>drop-off won't >>be as bad as when starting off in a near-EGTB position. > >I know this is a harsh test, but to begin with I posted this because I >experience this slowdown in real games. > >/David Everybody has seen this. That is why most of us limit how deep we are into the tree when probing is allowed. The information you get is perfect, but if you probe too much, the loss of depth gets you killed tactically. You have to find the right balance. I used to have an adaptive algorithm that varied the depth limit for probes based on how badly I was slowing down, but it was too complicated and too much trouble. And probes sometimes come in spurts with long "silent" spots due to hashing, etc...
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