Force on the side you won't reinforce

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  Difficulty: Advanced   Keywords: Tactics
[Diagram]

Forcing pattern

Black plays B1 as kikashi, having already decided on B3 to defend on the right. The presence of B1 will help in any later attack on White's group.

[Diagram]

Absurd

Supposing Black simply played at black+circle. Then later B1 is definitely the wrong side, strengthening Black where he is already strong. Therefore Black has nothing to regret about playing B1 of the previous diagram.

[Diagram]

White's other option

The other consideration is that W2 is another possible answer, once Black has played black+circle. With the timing as in the first diagram, White will connect at a because the right corner is still weak.



Therefore you can say that in this case the peep first also has a probing or inducing function.

Charles Matthews

I would say that it's your first diagram that shows the inducing function: Black wants to play in the corner, so he makes White play a move that puts pressure on the corner, making his already intended move a defense against this pressure.

On the other hand, the last diagram shows the probing function: Black forces White to make her choice of which side to connect at an early stage, before it is known/decided what Black will be doing in this position. - Andre Engels


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This is a copy of the living page "Force on the side you won't reinforce" at Sensei's Library.
(OC) 2011 the Authors, published under the OpenContent License V1.0.
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