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BeginnerExercise21

 

Beginner Exercise 21 Solution
  Difficulty: Beginner   Keywords: Problem

KarlKnechtel:

[Diagram]
Diag.: White escapes!

Black is caught in a connect-and-die. If Black a, White b captures. Otherwise, White captures at a, and is connected to the outside and escapes, thus living (by tsumego convention).


[Diagram]
Diag.: White failure

The double atari is wrong here: Black chooses which group to sacrifice, preventing White from connecting and escaping. Note the the bottom row of four is good for at most one eye. After White captures (perforce: if White tries to start making an eye below, Black will capture and White only gets one eye), Black reduces that to no eyes with the double hane:


[Diagram]
Diag.: White failure (con't)

White again has only one eye.



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