About Approach-Move Liberties (2009)
[ Sacrificing White's two stones
has the same effect ]
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Not answering Black's kikashi locally has a similar effect on White. If White lets Black capture her two stones, .... |
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... Black will have gained two prisoners, and one liberty. Here again, Black has eight liberties, six direct liberties (5 * We marked the direct liberty, Black has won by White's sub-optimal (as far as only the semeai, and nothing else, is concerned) answer with " |
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A sequence to take Black's group off the board. |
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, 
), and two approach-move liberties 
(Black has an eye, so these are real, not potential).
