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BOARDSIZE 19
SETUP W K17 O17 Q18 
SETUP B D16 G17 Q16 R17 Q14 
COM
Problem 31. Black to play.  

The white stones are overextended. Black has to attack now. How
should he play ? 
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B 1 M17
USER
CORRECT ANSWER
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COM
Correct Answer.

Black 1 is the invasion point. This urgent move takes priority
over all others.
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W 2 M18
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If White attaches with 2, ...
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B 3 L18
W 4 L17
B 5 N18
MARK 3@L18
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... Black plays 3 and 5.
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W 6 M16
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White tries to link up with 6 to ...
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B 7 N17
W 8 N16
B 9 O18
W 10 P17
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... 10, but ...
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B 11 O16
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... Black cuts with 11, catching three white stones.
<=
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