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Weak Player's Diagonal
    Keywords: Shape

[Diagram]
Diag.: Weak player's diagonal

According to Cho Hun-hyeon, the White kosumi is a weak player's diagonal. There is a star point joseki in which this shape occurs, but in general it should be avoided [1].


[Diagram]
Diag.: Completing the shape

Charles One way to understand the issue here is to see that Black a is a good way to play after Black 3. Therefore in general White 4 should be played now. White 4 at b is a play to attack Black more strongly, but Black at a will then remain as a weakness.

That's just one aspect of the problem for White with this shape: it tends to concede some influence.



[1] See joseki as a source of bad habits.



This is a copy of the living page "Weak Player's Diagonal" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.