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Legal position
Keywords: Rules
Of all the possible ways of placing some black and some white stones on a go board, only some can arise in a game in which the players follow the rules, starting from an empty board. To be a consequence of legal play, a position must be such that each stone or chain of stones on the board, of either colour, has at least one liberty.
This diagram shows part of an illegal position. None of White's stones
This position is also illegal. Neither of the marked chains has a liberty. One of them has been captured, but which one? This position can exist only during a play. Before the end of the turn the player with the move should remove the captured stones.
This is a copy of the living page "Legal position" at Sensei's Library. ![]() |