Author: Vasik Rajlich
Date: 07:48:55 04/04/04
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On April 03, 2004 at 06:29:13, Aivaras Juzvikas wrote: >On April 03, 2004 at 06:21:51, Vasik Rajlich wrote: > >>On April 03, 2004 at 04:02:57, Aivaras Juzvikas wrote: >> >>>i have got this problem here, check extention explodes in the endgame pawns + >>>rook or queen, all these open files make it possible to check endlessly. how to >>>restrict this? i added smth like this: if ply > depthtoreach + 4 then dont >>>extend, where depthtoreach is the depth im searching to. but this is ofcourse >>>not very good, because i still get those check extentions where its impossible >>>to mate anyway. how did u solve this problem? an idea would be to store info >>>into transposition table when not to extend, but how to find that out? >> >>Are you extending checks, check evasions, or both? >> >>The third option is quite appealing, but there are some issues. :-) >> >>Cheers, >>Vas > >when side to move in in check i extend, so i guess it would be a check evasion So, in certain positions, you are extending every other move. It's true that in these positions this will severely hurt your nominal depth, but if you test with the extension and without it you should see a clear benefit. I don't remember any claims to the contrary. Vas
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