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Bisecting a Knight is a Big Cut Indeed
Keywords: Proverb
The keima (knight's move) usually provides a reasonably fast way of extending and in general won't be cut. After a strike at the waist of the keima, cutting on the other side isn't possible immediately because the opponent can be caught in a ladder:
(Note that the actual "strike at the waist of the keima" proverb refers to the situation where there's a supporting black stone - see the page for details. It came to mind, though.) Of course, with two moves in a row locally, Black can plough straight through. The idea behind my proverb is that doing so is usually a very big play in actual game situations, and thus Black 1 is sente and a big ko threat in many cases. Why?
When Black is permitted to cut, the damage is evident, though contrived.
See also BQM23.
While locally the keima is quite strong, it takes only the marked black stone to ensure the cut - Yomiuri Shimbun's English language The Magic of Go column #179 is This is a copy of the living page "Bisecting a Knight is a Big Cut Indeed" at Sensei's Library. (C) the Authors, published under the OpenContent License V1.0. |