EVENT
BOARDSIZE 19
SETUP W L17 N16 P16 R16 B16 C14 C11 
SETUP B C17 D16 F16 J17 N17 
MARK 1@N16
COM
Problem 120. Black to play.  

What does Black do when White attaches with 1 ? 
ENDCOM
B 1 O16
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

Wedging in with 1 is the correct move.
ENDCOM
  VAR
  B 1 M16
  COM
  Failure.

  Playing hane with 1 is a bad move.
  ENDCOM
  W 2 M17
  B 3 O16
  W 4 N15
  B 5 P17
  W 6 O15
  B 7 O17
  W 8 Q17
  COM
  After White 8, the black stones are dead.
  <=
  ENDCOM
  ENDVAR
W 2 O15
B 3 O17
W 4 M16
MARK 3@O17
COM
After 3 and 4, ...
ENDCOM
B 5 R18
COM
... Black extends all the way to 5.
<=
ENDCOM