Author: Robert Hyatt
Date: 20:01:26 12/21/99
Go up one level in this thread
On December 21, 1999 at 19:49:51, James T. Walker wrote: >On December 21, 1999 at 17:48:49, Robert Hyatt wrote: > >>On December 21, 1999 at 15:38:45, James T. Walker wrote: >> >>>On December 21, 1999 at 14:54:47, Robert Hyatt wrote: >>> >>>>On December 21, 1999 at 14:18:05, Mike S. wrote: >>>> >>>>>This game is really horrible. I support what you say. Maybe programmers could >>>>>define a condition like "If no advancement (evaluation increase) is made for ten >>>>>moves, so accept a draw offer". The problem can also occur when a position is >>>>>theoretically won by the side which has a material advantage (which the computer >>>>>has and won't ever accept a draw therefore), but the computer can't find a >>>>>method to win. >>>>> >>>>>Btw., has anybody ever got a draw offer from a program? I haven't. I would like >>>>>to see this also. >>>>> >>>>>Regards, >>>>>M.Scheidl >>>> >>>> >>>>If you watch crafty play on ICC you will see it happen all the time. If you >>>>play it on your own machine it will also offer draws.... >>>> >>>>and accept them when it is reasonable to do so. >>> >>>I assume you are talking about "The Crafty" and not Crafty Clones. My >>>experience with Crafty is that it continues to play for a "Swindle" when the >>>tablebases tell it the game is a draw. Crafty has other annoying habits like >>>resigning at "Mate in 1" when it has been seeing mate for about 15 moves via the >>>tablebases. >>>Jim Walker >> >>What is annoying to you is just sound chess. It has been in _plenty_ of >>drawn krp vs kr endings where the kr side made a mistake and lost. No reason >>to offer a draw until the opponent draws the game. It has been in several >>mate-in-N positions where the opponent couldn't mate (one was knn vs kp where >>it had the kp). Why resign? Make your opponent win. Remember Kasparov vs Deep >>Blue round 2? > >Hello Bob, >Well first, you missed my point about the resigning in mate in 1. When my >computer is counting down from mate in 22 or something like that from >tablebases, Crafty is also aware of the impending mate since it uses the same >tablebases. So why go all the way to mate in 1 and then resign just before >mate? This seems like a childish act to me. Something a kid would do when mad >about losing. >I understand your reasons for not resigning in the cases you mention. >Jim Walker It works like this: Once a tablebase mate in N is found, and the mate drops every move, it will resign at mate-in-5... because it is convinced that by that point the opponent knows how to finish this off. But if the opponent 'slips' and goes from a mate in N to a mate in N+x, then the counter resets. And it is possible that at mate in 5 the opponent screwed up and reset the counter. I don't worry enough about this since most computers don't resign at all... And this doesn't happen often enough to count. IE one game a week maybe?
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