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BOARDSIZE 19
SETUP W N17 Q17 R14 B16 C14 C11 
SETUP B C17 D16 F16 K17 
COM
Problem 67. Black to play.  

Black wants to invade at the top right. Where should he play
? 
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B 1 O16
USER
CORRECT ANSWER
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COM
Correct Answer.

Black first makes a shoulder hit at 1 and, ...
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W 2 O17
COM
... after White defends at 2, ...
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B 3 R16
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... invades the corner with 3.
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W 4 Q16
B 5 R15
W 6 Q15
MARK 4@Q16
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If White 4 and 6, ...
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B 7 S14
W 8 R13
B 9 S13
W 10 R12
B 11 R17
COM
... Black lives in the corner with the moves to 11, his invasion
is a success.
<=
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