EVENT
BOARDSIZE 19
SETUP W B17 C15 D14 Q3 Q10 R12 R14 R15 R16 Q15 P16 O16 M16 
SETUP B D17 G16 D12 D4 Q16 Q17 R17 P17 N18 P15 P14 Q14 P12 
MARK \t@D17 \t@G16
COM
Problem 36. Black to play.  

Because of the two marked black stones, White's three stones
in the top right are in danger. How should Black attack ? 
ENDCOM
B 1 L13
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

Black attacks on a large scale with 1.
ENDCOM
  VAR
  B 1 L17
  COM
  Failure.

  Black is thinking on a small scale when he plays 1 ...
  ENDCOM
  W 2 L16
  B 3 K17
  COM
  ... and 3 along the third line.
  ENDCOM
  W 4 L13
  MARK \t@P12 \t@Q14 \t@P14 \t@P15
  COM
  When White jumps to 4,  it is Black's four marked stones that
  are in trouble.
  <=
  ENDCOM
  ENDVAR
W 2 K16
COM
If White jumps to 2, ...
ENDCOM
B 3 J15
MARK \t@D17 \t@G16
COM
... Black plays 3 and, because of the presence of the two marked
stones, White's stones will have a hard time living.
<=
ENDCOM