RTG Problem 44 / Solution

Sub-page of RTGProblem44

Solution

[Diagram]

Solution

Black can get a ko by playing at a; White can kill by capturing at b.



Failure

[Diagram]

Failure

Can Black live unconditionally by connecting at B1? The answer is no, Black is unconditionally dead after W2.

[Diagram]

Failure

If B3 here, then W4 and W6 kills. Note that this is not a seki: due to the circle weakness induced by the white+square stone, Black's eyespace is almost filled with three stones.

[Diagram]

Failure

B3 tries to lure White into a connect and die and capture three to make an eye, but W4 can play from the inside. Subsequently, a and b are miai. Note that if W4 at a, then Black at W4 lives!


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