PLAY MODE
    #: switch Play/View/Score mode
  PLAY AND SCORE MODES
    1,2,3,4,6,7,8,9: move cursor
    5: place stone
    *: undo, new move makes variation
  VIEW MODE
    1,3: prev/next 10 moves
    1,3(held): first/last move
    4,6: prev/next move
    7,9: prev/next variant fork
    2,8: prev/next variant
    5: switch to Play mode
    *: remove current stone
PROBLEM SOLVING MODE
    #: switch solution hint
    Other controls are as in the Play mode

BASIC RULES OF GO
    http://senseis.xmp.net/?BasicRulesOfGo
