EVENT
BOARDSIZE 19
SETUP W K19 K18 K17 L17 M16 N15 P16 Q17 R17 
SETUP B D17 C15 J17 J18 L18 M18 N17 N16 S17 R16 S15 Q14 
MARK 2@K19 1@J18
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Problem 43. Black to play.  

White stops Black from linking up by descending to 2. What should
Black do ? 
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B 1 O15
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CORRECT ANSWER
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Correct Answer.

Black should play 1, isolating the three white stones on the
right.
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W 2 O16
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If White cuts with 2, ...
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B 3 O18
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... Black makes shape with 3.
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W 4 M15
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White must defend with 4, but, ...
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B 5 P15
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... after 5, the four white stones on the right are dead.
<=
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