--- David Fotland <[EMAIL PROTECTED]> wrote: > I just looked at this position and it looks like a > win for black in the > first position. Many Faces evaluates it as a win > for black, and plays c1 to > save the lower left black group with almost no > thinking time. > > Mogo is correct because the lower left black group > is not dead.
That's interesting -- did Mogo know in some sense that the group could be defended, yet fail to actually play the necessary move(s)? I wonder if enough information is available in the playouts to determine that certain moves will dramatically tilt the outcome? Can that information indicate a sense of the urgency of certain moves compared to others? > > -----Original Message----- > > From: [EMAIL PROTECTED] > [mailto:computer-go- > > [EMAIL PROTECTED] On Behalf Of Matthew > Woodcraft > > Sent: Sunday, March 09, 2008 11:49 AM > > To: computer-go > > Subject: [computer-go] Life and Death > > > > I've included two 13x13 positions below. In both > positions it is > > Black's > > move. > > > > The first position is simplified from a real game. > Black has two > > enclosed dead groups, and White has a small but > easy win. > > > > The second position is a modified version of the > first in which the > > dead > > groups are more obviously dead. > > > > If I try MogoRelease3 playing as Black on position > 2, it shows a 20% > > score and resigns either immediately or after a > couple of moves. > > > > If I try it on position 1, it shows a score of > 70%+ for Black, and > > continues to play until White takes steps to > remove the dead groups > > from > > the board. I've tested with up to 2^24 playouts. > > > > I have tried increasing --collectorLimitTreeSize > and --limitTreeSize > > (like bigMogo in the scalability study), but I > can't set them much > > higher than the default on this machine without > running out of memory. > > > > I'd be interested to see if someone with a bigger > computer can find out > > what resources it needs to judge this position > well, and to see how > > other engines do. > > > > Position 1 > > > > (;GM[1]FF[4] > > CA[UTF-8] > > SZ[13] > > HA[0] > > KM[0.5] > > > AB[jb:kb][cb:cc][kc][bd:cd][jd:ld][be][he][cf:df][bg][gb:gh] > > > [ig:ih][jh:kh][eg:ei][li][aj:bj][hi:hj][lk][al][ck:cl][ji:jl] > > [dm][im] > > > AW[ia:ja][ib][hc:jc][db:dd][hd:id][ce:de][ie][ke:le][bf][hf:jf] > > > [lf][jg:kg][mg][lh][ai:di][gi][mi][cj][ej:gj][ij][dk:fk][hk:ik] > > [dl][il][bm][fl:fm][hm] > > ) > > > > Position 2 > > > > (;GM[1]FF[4] > > CA[UTF-8] > > SZ[13] > > HA[0] > > KM[0.5] > > > AB[jb:mb][cb:cc][kc][bd:cd][jd:md][be][he][cf:df][bg][gb:gh] > > > [ig:ih][jh:kh][eg:ei][li][aj:bj][hi:hj][bk:ck][lk][al][cl] > > [ji:jl][im] > > > AW[ia:la][ib][hc:jc][mc][db:dd][hd:id][ce:de][ie][ke:le][bf] > > > [hf:jf][lf][jg:kg][mg][lh][ai:di][gi][mi][cj][ej:gj][ij][dk:fk] > > [hk:ik][dl][fl][il][bm:cm][em:fm][hm] > > ) > > > > -M- > > _______________________________________________ > > 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/ > Terry McIntyre <[EMAIL PROTECTED]> Wherever is found what is called a paternal government, there is found state education. It has been discovered that the best way to insure implicit obedience is to commence tyranny in the nursery. Benjamin Disraeli, Speech in the House of Commons [June 15, 1874] ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping _______________________________________________ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
