Re: [computer-go] Long superko example
Brian, this is interesting. The sequence is as interesting as the superko, really, because it's the sort of strange sequence that would only occur to monte carlo programs. When black plays B9, a human white player would answer H4. This gives the highest win. If he's feeling obliging, he might answer A5. What he certainly would never play is A9. As for black, looks like he should resign instead of B9. I'm very curious what black thought the win rate was before B9 Christian On 04/10/2009 22:21, Brian Sheppard wrote: 1 2 3 4 5 6 7 8 9 A O O O X - X X O - B - O O X X O O - - C O - O X X - O O O D - O X X O O O X O E O O O O X X O X X F X O O X X X X X - G X X O O X O X - X H - X X - O O O X - J X X - O - X X - X X: B9 (hole-of-three) O: A9 (atari) X: B8 (capture) O: A8 (atari) X: A9 (capture) O: A8 (capture) ___ 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] Long superko example
The sequence is as interesting as the superko, really, because it's the sort of strange sequence that would only occur to monte carlo programs. Yes, that is why I posted it. I'm very curious what black thought the win rate was before B9... I do not know. This position wasn't from a game. It was from a playout. I was searching for instances of hole of three situations, following MoGo's recommendation. I was building a regression suite of test cases. I don't know whether Pebbles could play that sequence. I just noticed the possibility of a repetition while I was validating that the situation was a genuine hole of three. As for black, looks like he should resign instead of B9. You are right that X dies first in alternating play. But the only way to be sure of that is to play B9 and see what happens. So hole of three rule does generate a critical play here. 1 2 3 4 5 6 7 8 9 A O O O X - X X O - B - O O X X O O - - C O - O X X - O O O D - O X X O O O X O E O O O O X X O X X F X O O X X X X X - G X X O O X O X - X H - X X - O O O X - J X X - O - X X - X X: B9 (hole-of-three) O: A9 (atari) X: B8 (capture) O: A8 (atari) X: A9 (capture) O: A8 (capture) ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
[computer-go] Long superko example
1 2 3 4 5 6 7 8 9 A O O O X - X X O - B - O O X X O O - - C O - O X X - O O O D - O X X O O O X O E O O O O X X O X X F X O O X X X X X - G X X O O X O X - X H - X X - O O O X - J X X - O - X X - X X: B9 (hole-of-three) O: A9 (atari) X: B8 (capture) O: A8 (atari) X: A9 (capture) O: A8 (capture) ___ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
