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IkkenTobi
BQM52
TheKeimaIsLessSec...

 

Cut Ikken-Tobi
    Keywords: Shape, Tactics

[Diagram]
Diag.: Cutting an Ikken Tobi

The diagram shows what happens if White cuts the ikken tobi in absence of supporting stones. (Black can of course play 4 at 5.) Black 6 threatens a shicho at a, but Black may well play 6 differently depending on the board. In general, White will struggle to keep both 1+3 and 5 alive.

This is why in general, Do not try to cut ikken-tobi.


[Diagram]
Diag.: Safe Ikken Tobi

Here, the ikken tobi is reinforced by Black 1, and can no longer be cut. (after the sequence a - d White cannot cut)

--MortenPahle



BQM52 has some more information about cutting the Ikken Tobi in connection with walls.



This is a copy of the living page "Cut Ikken-Tobi" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.