Author: Jason Williamson
Date: 04:49:50 03/23/00
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On March 23, 2000 at 06:14:22, Andrew Williams wrote: >On March 23, 2000 at 05:16:56, Francis Monkman wrote: > >>On March 23, 2000 at 03:09:33, Jason Williamson wrote: >> >>>I have been running Amnon 5.06 under Fritz and have noticed really WEIRD >>>pondering by Amnon. It almost seems that it was just randomly looking at a move >>>and analysing it, even if said move just dropped a queen in one move, or a piece >>>or what ever. Mind you, it plays ok on its own time, and still maintains a >>>position of one of the top 5 or 6 amatuer chess engines I have. >>> >>>Jason >> >>If I'm not mistaken, this problem is related to the difficulty of extracting a >>pv line from an MTD(f) search. >> >>Francis > >This is interesting (to me anyway). My program uses mtd(f) and it extracts >its PV from the hash table. I found that if the hash table is of a reasonable >size, the PV for the first several plies is usually OK. > >Some figures: I've got a log files from the last few days' play on ICC. >PostModernist pondered 4515 times in these games and its pondering move >was right 52% of the time. Obviously this doesn't say anything about the >quality of the moves it was pondering when it was wrong, but in watching it >I have only very rarely noticed my program pondering a move that is obviously >not going to occur. > >Is there any way, Jason, to say how often AnMon's pondering move is correct? >Even an approximation would be interesting. > > >Andrew Lets say 1 in 10 would be generous. Compared to other engines, Anmon was pondering quite bizzare. I mean, with PM, how often will PM ponder a move that puts a piece enprise?
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