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Capture
CaptureThreeToMak...
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CompromisingTheDi...
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Capture two, recapture one
  Difficulty: Beginner   Keywords: Tactics

[Diagram]
Capture two recapture one

W1 captures two stones. Black can play B2 at BC and recapture a stone. This is not a ko. Also, this sequence gives no eye to White.



There are a lot of situations where this sequence is a possible variation, the consequences of which are easily overlooked. An example:

[Diagram]
Black to live

Black to live. The combination of the marked shape with the 1-2 point is very common in life and death problems. Yet our desire to atari may overcome us:


[Diagram]
Mistake by both

This is a line easily visualized and often played by both players if they fail to see the meaning of this shape.


[Diagram]
Black punished

White plays W2 and recaptures a stone with W4 at WC after B3 takes two stones. Black is dead.


[Diagram]
Correct

Black's correct move is the 1-2 point. White can't play W2 at a due to shortage of liberties. If White next b, Black a gives life.

Dieter (maybe this material has already been covered elsewhere)



See also:



This is a copy of the living page "Capture two, recapture one" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.