RTG Problem 67 / Solution

Sub-page of RTGProblem67

Problem 1

Status: Black can obtain a two-stage ko for life.

[Diagram]

Solution

Notice that Black a is sente. This allows the sequence from B3 onwards.

[Diagram]

Solution

Black starts a two-stage ko for life.

[Diagram]

Variation

White cannot avoid the ko with W4 and W6. B7 catches the White stones in a connect-and-die.


Problem 2

Status: Black is unconditionally dead.

[Diagram]

Solution

The tesuji of W6 prevents Black from making a ko.


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