EVENT
BOARDSIZE 19
SETUP W D17 D15 C10 H17 H15 R17 R16 R14 
SETUP B K17 K15 Q17 Q16 Q15 Q10 
MARK 1@R14
COM
Problem 83. Black to play.  

As mentioned in Problem 80, White 1 is a bad move. How does Black
punish White ? 
ENDCOM
B 1 R15
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

Black plays 1 ...
ENDCOM
W 2 S15
B 3 S16
COM
... and 3.
ENDCOM
  VAR
  B 3 S14
  COM
  Failure.

  Cutting below with 3 is a mistake.
  ENDCOM
  W 4 S13
  COM
White ataris with 4 and will get a ponnuki along the side. See
  the next Problems for the continuation.
  <=
  ENDCOM
  ENDVAR
W 4 S17
COM
If White 4, ...
ENDCOM
  VAR
  W 4 S14
  COM
  Failure for White.

  White 4 here is bad.
  <=
  ENDCOM
  ENDVAR
B 5 S14
COM
... Black ataris at 5, ...
ENDCOM
W 6 T16
B 7 R13
COM
... then catches a stone in a ladder with 7, confining White
to the corner. Black also gets a thick wall.
<=
ENDCOM