I can indeed reproduce it with -t =2000. uct_pass_is_safe() returns false when there are not enough playouts. So it prefers a sure loss :-( I am testing a fix.
Jean-loup 2011/8/5 Michael Williams <[email protected]> > Here is the command line: > > ../pachi -t =2000 resign_threshold=0 > > I thought it was failing at higher strengths as well, but now I can only > reproduce the problem at that strength. But it still seems like it should > be able to solve it. > > Here is the SGF: > > boardsize 6 > komi -35.5 > > clear_board > play b d4 > play w d3 > play b b1 > play w c6 > play b a2 > play w f4 > play b c2 > play w a4 > play b d6 > play w c4 > play b d2 > play w c1 > play b f5 > play w c3 > play b e1 > play w e3 > play b d1 > play w f1 > play b e6 > play w a5 > play b f6 > play w f3 > play b e2 > play w b4 > play b b3 > play w d5 > play b a3 > play w b5 > play b e5 > play w b6 > play b c1 > play w e4 > play b e6 > play w d6 > play b b2 > play w a6 > genmove b > genmove w > genmove b > genmove w > genmove b > genmove w > genmove b > genmove w > genmove b > genmove w > genmove b > genmove w > genmove b > genmove w > genmove b > genmove w > genmove b > genmove w > genmove b > genmove w > genmove b > genmove w > > > On Fri, Aug 5, 2011 at 5:33 AM, Jean-loup Gailly <[email protected]> wrote: > >> pachi passes for me in this situation. It would help if you gave the .sgf >> or .gtp file, >> the pachi version and all the options you have used. >> >> Jean-loup >> >> 2011/8/5 Michael Williams <[email protected]> >> >>> Why does pachi fill it's eye here, when it can simply pass and win the >>> game (komi = -35.5) ? >>> >>> >>> IN: genmove b >>> <pre-simulated 816 games> >>> (UCT tree; root white; extra komi 0.000000; max depth 10) >>> [F6] 1.000/1002 [prior 0.059/119 amaf 1.000/824 crit 0.000] h=0 c#=3 >>> <fbfb7> >>> [pass] 0.995/1004 [prior 0.500/14 amaf 0.000/0 crit -0.005] h=0 c#=5 >>> <fbfbd> >>> (avg score 0.000000/0 value 0.000000/0) >>> [186] best 0.000000 | seq | can pass(0.995) A1(0.000) >>> F1(0.000) >>> *** WINNER is A1 (1,1) with score 0.0000 (0/1002:186/186 games), extra >>> komi 0.000000 >>> genmove in 0.10s (1820 games/s, 606 games/s/thread) >>> playing move A1 >>> Move: 41 Komi: -35.5 Handicap: 0 Captures B: 2 W: 8 >>> A B C D E F A B C D E F >>> +-------------+ +-------------+ >>> 6 | O O O O . O | 6 | O O O O O O | >>> 5 | O O . O O . | 5 | O O O O O O | >>> 4 | O O O . O O | 4 | O O O O O O | >>> 3 | X X O O O O | 3 | X X O O O O | >>> 2 | X X X X X X | 2 | X X X X X X | >>> 1 | X)X X X X . | 1 | X X X X X X | >>> +-------------+ +-------------+ >>> >>> >>> _______________________________________________ >>> Computer-go mailing list >>> [email protected] >>> http://dvandva.org/cgi-bin/mailman/listinfo/computer-go >>> >> >> >> _______________________________________________ >> Computer-go mailing list >> [email protected] >> http://dvandva.org/cgi-bin/mailman/listinfo/computer-go >> > > > _______________________________________________ > Computer-go mailing list > [email protected] > http://dvandva.org/cgi-bin/mailman/listinfo/computer-go >
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