EVENT
BOARDSIZE 19
SETUP W K16 M16 O17 
SETUP B D16 H17 M17 Q16 Q14 R10 
MARK 1@M16
COM
Problem 5. Black to play.  

How does Black respond when White attaches on top with 1 ? 
ENDCOM
B 1 L16
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

Black should wedge in with 1.
ENDCOM
W 2 L15
  VAR
  W 2 L17
  COM
  Variation.

  White could also atari underneath with 2. 
  ENDCOM
  B 3 L15
  W 4 K17
  B 5 N16
  W 6 M18
  B 7 M15
  W 8 N17
  COM
  White links up, but ...
  ENDCOM
  B 9 P10
  COM
  ... Black makes a large-scale moyo on the right when he plays
  9.
  <=
  ENDCOM
  ENDVAR
B 3 L17
W 4 N16
B 5 K17
COM
Up to 5, Black has gouged out White's base. Black is satisfied
with this result.
<=
ENDCOM