EVENT
BOARDSIZE 19
SETUP W D18 F17 J17 R10 S17 S16 R17 Q17 Q18 P18 P16 
SETUP B C17 D16 D14 C10 O18 P17 O17 N17 Q16 R16 R14 S15 
MARK 8@P15
COM
Problem 74. White to play.  

Black has omitted 8 in the Correct Answer of Problem 71. How
should White continue ? 
ENDCOM
W 1 P15
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

White first exchanges 1 ...
ENDCOM
B 2 Q14
COM
... for 2, ...
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  VAR
  B 2 M15
  COM
  Failure.

  If Black jumps to 2, ...
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  W 3 Q14
  COM
  ... White attaches at 3.
  ENDCOM
  B 4 R15
  COM
  If Black 4, ...
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  W 5 R13
  COM
  ... White 5 captures the black stones on the right.
  <=
  ENDCOM
  ENDVAR
W 3 N15
COM
... then jumps to 3. Black is now separated into two weak groups.
<=
ENDCOM