Beginner Exercise 37 / Solution

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Solution

[Diagram]

Nice sac

B1! is a nice sacrifice often overlooked in practice. W2 captures one stone, but B3 leaves White dead. The points a and b are miai, meaning that the eye is false.

[Diagram]

short of liberties

If W2 connects here, B3! kills. Shortage of liberties prevents White from playing W4 at B5. Thus White is left with a false eye. Note that W2 touches the marked Black stone, reducing the liberties.


Failures

[Diagram]

Failure 1

Black must play B1 and B3 in the order described in the solution diagram.

[Diagram]

Failure 2

B1 here is too slow. After W2, a and b are miai for the second eye.

[Diagram]

Failure 3

B1 is a thank you move that allows White to connect at W2 and live.

[Diagram]

Failure 4: Ko

B1 is part of the solution, but if B3 is played as shown in this diagram, we end up with a ko instead of an unconditional kill.



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