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White is forced to play oki, to prevent a living Black shape.
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Black plays elsewhere on the board, ...
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... while White is busy taking liberties of Black's group in the lower right corner.
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White needed five moves to take Black's group off the board.
This connected Black group (), including the hanezeki's tail, has five effective liberties in the very beginning, after White's forced oki. And it is Black's turn.
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), including the hanezeki's tail, has five effective liberties in the very beginning, after White's forced oki. And it is Black's turn.
