EVENT
BOARDSIZE 19
SETUP W C12 K17 M17 Q17 R15 R14 
SETUP B D17 C14 H17 O17 Q15 
MARK 2@R15 1@Q15
COM
Problem 85. Black to play.  

Against the shoulder hit of Black 1, White responds with 2. What
should Black do now ? 
ENDCOM
B 1 Q18
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

Black 1 is a brilliant move. However White answers, Black has
an effective continuation.
<=
ENDCOM
  VAR
  B 1 Q16
  COM
  Failure.

  Forcing with Black 1 ...
  ENDCOM
  W 2 R16
  B 3 P17
  COM
  ... and 3 is unimaginative.
  ENDCOM
  W 4 Q18
  COM
  White's corner territory becomes large and impregnable after
  White descends to 4.
  <=
  ENDCOM
  ENDVAR