EVENT
BOARDSIZE 19
SETUP W D16 D10 D4 K4 L16 O17 R13 R14 R16 R17 R18 Q18 
SETUP B J16 P18 P17 Q17 O16 Q16 Q15 Q13 Q12 Q10 M4 Q4 
MARK \t@L16
COM
Problem 19. Black to play.  

How should Black attack the marked white stone ? 
ENDCOM
B 1 K14
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

Black should play the knight's move of 1.
ENDCOM
  VAR
  B 1 L14
  COM
  Failure.

  Capping with Black 1 is a terrible move.
  ENDCOM
  W 2 K15
  COM
  White moves out into the center with the diagonal move of 2.
  ENDCOM
  B 3 J13
  COM
  If Black 3, ...
  ENDCOM
  W 4 J15
  MARK \t@J16
  COM
  ... White plays 4 and neutralises the marked stone. Black has
  suffered a big loss.
  <=
  ENDCOM
  ENDVAR
W 2 M14
COM
If White runs away with 2, ...
ENDCOM
B 3 L12
MARK \t@Q10 \t@Q12 \t@Q13 \t@Q15 \t@Q16 \t@Q17 \t@P18 \t@P17 \t@O16
COM
... Black drives White into his marked stones with 3. White's
stones are lost.
<=
ENDCOM