EVENT
BOARDSIZE 19
SETUP W C17 B16 K15 Q17 R15 
SETUP B C16 D16 D17 D14 C10 H16 K17 
MARK 1@C16 \t@B16
COM
Problem 110. White to play.  

In answer to the marked white stone, Black plays 1. How does
White respond to this move ? 
ENDCOM
W 1 B18
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

White 1 makes good shape.
ENDCOM
  VAR
  W 1 C18
  COM
  Failure.

  White can live with 1 here also, but it is not good.
  ENDCOM
  B 2 B15
  W 3 A17
  B 4 D18
  W 5 B18
  COM
  White's territory in the corner is small.
  <=
  ENDCOM
  ENDVAR
B 2 B15
COM
If Black 2, ...
ENDCOM
W 3 D18
COM
... White plays 3.
<=
ENDCOM