EVENT
BOARDSIZE 19
SETUP W C14 H17 O17 
SETUP B D16 F16 L17 Q16 Q14 R10 
MARK 1@L17
COM
Problem 41. White to play.  

Black has invaded deeply with 1. How should White play ? 
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W 1 H15
USER
CORRECT ANSWER
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COM
Correct Answer.

White should first exchange 1 ...
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B 2 F14
COM
... for Black 2, ...
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W 3 Q17
COM
... then attach with 3 ...
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B 4 R17
W 5 R18
COM
... and 5, ...
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B 6 S18
COM
... hoping to lure Black in to playing 6.
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W 7 L15
COM
White then caps the black stone with 7.
<=
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B 8 M16
COM
Running away with 8 is natural, but ...
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W 9 M15
B 10 N16
W 11 R16
COM
... then White switches to the corner and ...
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B 12 S17
W 13 Q15
B 14 P16
W 15 O16
MARK 11@R16 13@Q15
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... forces with 11, 13, and 15.
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B 16 P15
W 17 O15
COM
After White 17, the black stones in the center are trapped.
<=
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