EVENT
BOARDSIZE 19
SETUP W D17 C3 N4 M4 L3 K2 J2 N2 O2 Q4 Q5 P5 O5 R5 Q7 P8 O8 N8 
SETUP B G3 J3 K4 L6 N6 N5 M2 O4 P4 P2 Q3 R3 R4 O9 P9 Q9 Q8 Q16 
MARK B@Q14 C@L9 A@D15
COM
Problem 139. Black to play.  

The proverbs instructs us to play the urgent point before the
big point. But sometimes it is hard to tell which points are
urgent or even how urgent it is. Where is the urgent point here
? 
ENDCOM
B 1 L9
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

It is important for Black to play 1 because it not only confines
White to the right side, ...
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  VAR
  B 1 D15
  COM
  Failure.

  If Black rushes to play 1, ...
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  W 2 L8
  COM
  ... White will jump to 2.
  ENDCOM
  B 3 H2
  COM
  If Black makes shape by forcing with a, ...
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  W 4 O1
  MARK 3@H2
  COM
  ... White lives in sente with 4, so Black 3 is not a forcing
  move. As you can see, the black stones at the bottom are vulnerable.
  <=
  ENDCOM
  ENDVAR
W 2 M7
B 3 L5
W 4 R7
COM
... but also forces her to make life for her stones by descending
to 4. After this, ...
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B 5 D15
COM
... Black is free to play the big point of 5 and take a big lead.
<=
ENDCOM