Author: Jason Williamson
Date: 11:26:06 03/23/00
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On March 23, 2000 at 08:24:39, Andrew Williams wrote: >On March 23, 2000 at 07:49:50, Jason Williamson wrote: > >>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? > >OK. That is odd. What size hash table has it got? Does it ever fail to produce >a move at the root? > >As for PM, I think this happens *very* rarely. I've seen that maybe four >or five times since PM has been online, but of course I don't watch every >game, nor do I inspect every log file it generates. > > >Andrew Im a little unclear as to what you mean "fail to produce a move a root". If mean failing to generate a line to ponder, no I never noticed that. As to the hash I was using 32M. Jason
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