EVENT
BOARDSIZE 19
SETUP W D16 K16 O17 R5 D4 
SETUP B Q16 Q14 Q9 Q3 K4 
MARK 1@R5
COM
Problem 55. Black to play.  

White 1 is a bad move. How should Black answer ? 
ENDCOM
B 1 R4
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

Attaching with Black 1 is the only move. It robs White of her
base and, ...
ENDCOM
  VAR
  B 1 P4
  COM
  Failure.

  Black 1 is a lukewarm move, it is lacking a plan.
  ENDCOM
  W 2 S3
  COM
  White is happy to slide to 2, making a base for her stones in
  the lower right.
  <=
  ENDCOM
  ENDVAR
W 2 Q5
COM
... when White stands at 2, ...
ENDCOM
B 3 O4
COM
... Black launches a powerful attack on the two white stones
with 3.
<=
ENDCOM