EVENT
BOARDSIZE 19
SETUP W K17 F16 F17 R16 S15 
SETUP B D16 D14 E17 N17 Q16 R15 Q15 R10 
MARK 2@Q15 1@S15
COM
Problem 136. White to play.  

Black answers White 1 by connecting at 2. What is White's next
move ? 
ENDCOM
W 1 S16
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

White 1 is the best move.
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  VAR
  W 1 R17
  USER
  CORRECT ANSWER
  ENDUSER
  COM
  Correct Answer.

  If White plays 1, ...
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  B 2 S14
  MARK 1@R17
  COM
  ... Black blocks at 2. In certain positions, White 1 could be
  a good move.
  <=
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  ENDVAR
B 2 S14
COM
If Black blocks with 2, ...
ENDCOM
W 3 Q17
B 4 P17
W 5 Q18
MARK 3@Q17
COM
... White lives in the corner with 3 and 5.
<=
ENDCOM