Beginner Exercise 47 / Solution

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[Diagram]

Solution

W1 is a double threat: snapback at a and throw-in ko at b. The snapback will kill Black unconditionally, so....

[Diagram]

Solution (continued)

B2 connects and W3 starts the ko in which Black takes first at a. If White wins the ko, he captures four Black stones at b.

[Diagram]

If Black wins the ko

If Black wins the ko, Black lives with B4 and B6.

[Diagram]

White can't avoid ko

Black cannot avoid the ko by connecting at B4, as W5 captures all the Black stones.

[Diagram]

Inferior for Black

Black can also start a ko with B2. However, this is inferior to the solution above because White takes first (see try to get first capture in a ko).



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