EVENT
BOARDSIZE 19
SETUP W F17 L16 O16 O17 
SETUP B D14 D16 P17 Q16 Q14 
COM
Problem 45. Black to play.  

There are so many places where Black can invade. Where do you
think is the best point ? 
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B 1 J16
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.  

Black should play near White's strong side with 1. This is the
correct invasion point.  
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  VAR
  B 1 H16
  COM
  Failure.

  Even though it is high, playing 1 one line to the left is dubious.
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  W 2 H17
  B 3 J17
  W 4 J16
  MARK 2@H17
  COM
  White 2 and 4 hit the mark, Black cannot get a good result.
  <=
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  ENDVAR
W 2 F15
COM
If White jumps to 2, ...  
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B 3 J14
COM
... Black is also happy to jump to 3. Black has split White into
2 groups.  <= 
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