You always need to be extremely careful about these kind of heuristics. Especially in MC programs they can be detrimental very easily.
But I believe you can come up with a reasonable rule to prevent some self-atari's. I have one which is something along the following lines: - puts itself into atari - has four occupied neighbours, one of which is its own color - does not put the opponent in atari Probably better rules can be invented. I would be surprised if any such rule is always 100% safe. But these at least cover your case. Another rule I just thought of that may work very well is not put yourself into atari with more than one stone if you can play at the other liberty without putting yourself into atari. Mark On Wed, Jul 1, 2009 at 7:06 AM, Christian Nentwich<christ...@modeltwozero.com> wrote: > > |- - - - - - - > |. * * o . . . > |* . * o * . * > |o . o o * . . > |o * o . * . . > |o o o * . . . > |. * * * . . . > |. . . . . . . > |. * . . . . . > > Black to play and kill :) > > Christian > > > On 01/07/2009 17:41, Magnus Persson wrote: >> >> In this case one needs to check that after the two stones are captured the >> capturing single stone can be recaptured bringing us back to where we >> started. If it is a "big eye" there is no recapture. >> >> -Magnus >> >> Quoting Brian Sheppard <sheppar...@aol.com>: >> >>>> For black I think I prune this kind of two stone suicide >>>> always no matter what the situation is (exception is ko). These >>>> prunings are probably wrong in some extremely rare cases. >>> >>> How can you tell the difference between this kind of two-stone >>> self-atari, and a self-atari of two stones within an opponent's >>> "big eye", which could be necessary for life&death? >>> >>> _______________________________________________ >>> computer-go mailing list >>> computer-go@computer-go.org >>> http://www.computer-go.org/mailman/listinfo/computer-go/ >>> >> >> >> > > _______________________________________________ > computer-go mailing list > computer-go@computer-go.org > http://www.computer-go.org/mailman/listinfo/computer-go/ > _______________________________________________ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
