EVENT
BOARDSIZE 19
SETUP W J17 N16 O17 P16 N18 
SETUP B D16 G17 M17 P17 Q17 R16 R14 
MARK \t@N18
COM
Problem 30. Black to play.  

After White plays the marked stone, how should Black continue
? 
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B 1 K16
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

There are two Correct Answers. Black plays 1 here if he wants
outside thickness.
<=
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  VAR
  B 1 K18
  USER
  CORRECT ANSWER
  ENDUSER
  COM
  Correct Answer.

  If Black wants to link up to his stones on the left, he will
  play 1 on the second line.
  <=
  ENDCOM
  ENDVAR