EVENT
BOARDSIZE 19
SETUP W D17 C15 G17 N17 R13 R10 D4 
SETUP B J16 P17 Q16 R15 R8 R4 P3 
MARK \t@G17
COM
Problem 62. Black to play.  

White has just played the marked stone. How should Black attack
the lone white stone at the top right ? 
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B 1 M16
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

The shoulder hit of Black 1 is a powerful move.
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  VAR
  B 1 P13
  COM
  Failure.

  If Black attacks the two white stones on the right with 1, ...
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  W 2 L16
  COM
  ... White will extend to 2. Now it is Black who has to escape.
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  B 3 J14
  COM
  If he jumps to 3, ...
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  W 4 L14
  COM
  ... White will follow him with 4. White is becoming strong at
  the top, while her two stones on the right are quite resilient.
  <=
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  ENDVAR
W 2 N16
COM
If White tries to escape into the center with 2, ...
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B 3 N15
COM
... Black blocks with 3.
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W 4 O15
B 5 M15
W 6 O16
B 7 O14
COM
After Black 7, the white stones are trapped.
<=
ENDCOM