two by three corner

Two by three in the corner  

This, like the nakade, is a false seki - it looks like a seki but isn't. However unlike the nakade it depends on the enclosing stones having no outside liberties.

The exact position of the marked liberties can vary. There are 15 possibilities, all having in common that black is able to make a 2 x 3 rectangle shape.

two by three corner last edited by on February 6, 2019 - 16:28
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