Go 19x19 vs Computer

19x19 board. You play black and move first, the computer plays white. Each turn, place one stone on an empty point; a group with no empty point next to it (no liberties) is captured. Suicide is not allowed, and you may not immediately recapture a single stone that just captured yours (ko). When you have nothing more to play, press Pass; two passes in a row end the game. Each side scores its stones on the board plus the empty points that touch only its own stones; white gets 7.5 extra points. Dead stones are not removed automatically, so capture them before passing. You start at level 1/5: a win moves you up a level, a loss moves you down a level.