EVENT
BOARDSIZE 19
SETUP W D16 C17 B17 G17 R10 P10 R6 Q6 Q5 D4 C6 D10 
SETUP B C16 C15 D15 L17 P16 R16 R12 R5 R4 Q3 P4 K4 F3 
MARK A@C16 B@C17 C@C15 D@B17 E@D15
COM
Problem 102. White to play.  

How should White play after the skirmish to Black E in the upper
left ? 
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W 1 E16
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

White should calmly extend to 1, ...
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  VAR
  W 1 C13
  COM
  Failure.

  The pincer of White 1 is not good.
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  B 2 E16
  COM
  Black can get good shape by playing an atari at 2, ...
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  W 3 D17
  B 4 F14
  MARK B@E15 A@D13
  COM
  ... then jumping lightly to 4. Black could also make sabaki by
  attaching at A or connecting at B.
  <=
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  ENDVAR
B 2 C12
COM
... allowing Black to extend to 2.
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W 3 C10
COM
White then secures the lower left with 3.
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B 4 E12
COM
In the end, Black must secure his stones by jumping to 4.
<=
ENDCOM