Beginner Exercise 204 / Solution

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Solution

[Diagram]

Solution

In this problem, Black cannot live unconditionally. We start off by playing at B1, which reduces the liberties of the white+circle stones by one.

[Diagram]

Solution

If W2 wants to kill, then the number of liberties of the white+circle stones is further reduced by one. This enables B3 to start a ko for life.



Failure

[Diagram]

Failure

Although B1 also reduces the number of liberties of the white+circle stones by one, W2 destroys the eye and does not have to reduce the number of liberties of the white+circle stones. So Black loses the capturing race.

[Diagram]

Failure

Although cutting at B1 seems like a reasonable move, W2 is a clever move that kills.



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(OC) 2012 the Authors, published under the OpenContent License V1.0.
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