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Ikken Tobi
  Difficulty: Beginner   Keywords: Shape, Tactics

[Diagram]
Diag.: Ikken Tobi

The Ikken Tobi, or one-space jump, is often used to connect groups of stones. It is not completely safe, since it can always be cut, but in general, the attacker will also end with two cut apart groups and will find life difficult.


[Diagram]
Diag.: Cutting an Ikken Tobi

The diagram shows what happens if white cuts. (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.


[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



This is a copy of the living page "Ikken Tobi" at Sensei's Library.
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