EVENT
BOARDSIZE 19
SETUP W B16 C14 C11 M16 M15 N15 R14 Q10 
SETUP B C17 D16 F16 K16 L15 M14 O16 Q16 
MARK A@N14 1@N15
COM
Problem 57. Black to play.  

White seems to be afraid to play 1 at A ( White 5 in the Correct
Answer to Problem 55), but White 1 here is a bad move. How does
Black take advantage of this mistake ? 
ENDCOM
B 1 Q14
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

Black shifts the attack to the right with 1 ...
ENDCOM
W 2 Q13
B 3 P14
COM
... and 3.
ENDCOM
W 4 R15
MARK 2@Q13
COM
If White 2 and 4, ...
ENDCOM
  VAR
  W 4 N14
  COM
  Variation.

  If White might turn at 5, ...
  ENDCOM
  B 5 R13
  COM
  ... Black cuts at 5, seizing the initiative on the right side.
  <=
  ENDCOM
  ENDVAR
B 5 N14
COM
... Black plays 5. The white stones at the top are almost dead.
<=
ENDCOM