I just finished a few 19x19 games with the freely downloadable version of Mogo, and noticed that Mogo loses a fair number of points in the endgame.
I'll email an sgf file shortly, but the pattern is fairly easy to describe: when territories have been fairly well enclosed, Mogo will just as often play inside its own territory as fill a "dame" or neutral point which is claimed by neither player. It will even ignore common yose plays at the edges. I seldom play Chinese rules, so my understanding may be deficient; please correct me if so. My observations seem to match this description: http://senseis.xmp.net/?TerritoryAndAreaScoring Under Japanese rules, it doesn't matter who plays dame; they don't count as territory. Under Chinese rules, it is important to play dame, which effectively expands one's area. I understand area to mean the count of one's territory plus one's live stones. I won a couple games against Mogo by the simple expedient of patiently filling in dame, connecting any singletons left in atari, and capturing any singletons - all of which increase my stones on the board without diminishing my territory - that is, increasing my area. As I steadily increased my score, Mogo would play inside its own territory, which neither increases nor decreases area. I'd pass, Mogo would pass, and the score would show me ahead by a few points. This was on a dual-core athlon with 1800 seconds total time and two threads. Reviewing the TerritoryAndAreaScoring page, it occurs to me that there are several conventions regarding the handling of handicap stones with Chinese scoring; I was using GoGui to compute the area score, and will look into the conventions. It is possible that Mogo uses a different convention than GoGui, and may have estimated the score a bit differently. More study. If yose handling were improved, Mogo ( and perhaps other similar programs ) would be a few stones stronger. This looks like "low-hanging fruit," but I could be wrong. Terry McIntyre <[EMAIL PROTECTED]> They mean to govern well; but they mean to govern. They promise to be kind masters; but they mean to be masters. -- Daniel Webster ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
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