Author: Uri Blass
Date: 08:18:53 09/06/00
Go up one level in this thread
On September 06, 2000 at 11:06:16, Robert Hyatt wrote: >On September 06, 2000 at 06:14:29, Amir Ban wrote: > >>On September 05, 2000 at 10:32:27, Robert Hyatt wrote: >> >>>On September 05, 2000 at 01:18:55, Mark Longridge wrote: >>> >>>>I was playing crafty the other day and white had a pawn on h7, and a knight on >>>>g5, black's king is in the corner, and black has only it's king. >>>> >>>>There's absolutely no way black can win with just a king, but it STILL REFUSES >>>>A DRAW request! >>>> >>>>It just seemed very odd ;-) >>> >>> >>>It mainly depends on how you have things set up. And even if it is set up >>>correctly, there are 'rules' that have to be satisfied before it will accept >>>a draw. IE it has to believe it is a draw. It also has to get a draw score >>>back from the search for 5 consecutive moves (3 for GM players) before it will >>>accept or offer a draw. >>> >>>Just giving the position doesn't provide enough information... >>> >>>The log.nnn file is also needed. >> >>The position provides all the relevant information. >> >>It's your problem, not the opponent's to make sure your program behaves >>reasonably. >> >>Asking the opponent to provide internal crafty parameters and logs is not >>reasonable. >> >>Amir > > >Your assumptions are wrong. The default setup _will_ offer draws. But it is >possible that the user has disabled this and not remembered. The position >doesn't say a thing, because of the rules I gave. Crafty has to find a draw >score 5 moves in a row to offer a draw. The current search eval has to be ><= drawscore for it to accept a draw, and it won't accept a draw at all during >the first 30-40 moves of the game. Based on that, I can't look at a position >and say whether it should have accepted a draw offer there or not... It might >have accepted after 4 more moves... who knows without seeing what went on in >the _game_... This is a logical explanation for the fact that crafty did not agree to a draw but better rules should tell it always to accept a draw if it has only a king. Uri
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