Author: Tony Werten
Date: 00:33:06 08/11/01
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On August 10, 2001 at 16:04:18, Artem Pyatakov wrote: >I just implemented pondering in my program, but it seems that this has a >negative effect on average search depth in games. Here is my reasoning: > >1) My engine is not very strong, so especially in games against humans, the >percentage of the times when it ponders correctly in "indecisive positions" is >low. >(Aside question: What approximate percentages do programs like crafty have?) I'm quite sure it changes with the opponent. When I played Patzer last time, I think we predicted each other moves about 90% of the time. The only reason for not moving immediately was that after predicting the right moves a couple of times, the time spend would not be long enough. (the game ended in a draw) > >2) So, let's say the ponder was incorrect. Wouldn't the ponder process have >ended up loading a lot of "junk" into the hash table and the history table? If you're afraid of that, copy the whole stuff before pondering and copy it back after an unexpected move. > >Does this even sound reasonable? Has anyone run into this? Or is this most >probably a bug? Any suggestions/comments are appreciated. From my own experience, I know it is possible to make a lot of mistakes in pondering :( Tony > >Thank you. > >Artem
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