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BentFourInTheCorn...

 

Bent four in the corner exercise 3 / Solution
Sub-page of BentFourInTheCornerExercise3

[Diagram]
White to play

ChrisSchack: W1 is the vital point, and kills unconditionally.


[Diagram]
Black tries to extend

If B tries to get more eyespace, W simply seals him in, and W cannot be prevented from playing a, then killing with an almost-fill by a bent four at the end of the game. This would only be ko if White needed to capture before game-end, to ensure a surrounding group's safety.



This is a copy of the living page "Bent four in the corner exercise 3 / Solution" at Sensei's Library.
(OC) 2004 the Authors, published under the OpenContent License V1.0.