EVENT
BOARDSIZE 19
SETUP W D15 D16 D17 E17 E18 Q4 C5 C4 D3 F2 D11 K17 
SETUP B C18 D18 C17 C16 C14 F17 P17 R16 R10 C6 D5 D6 F4 
COM
Problem 96. White to play.  

It seems as if White should play in the lower right or at the
top. But look at the whole board before deciding on your move.
ENDCOM
W 1 D14
MARK \t@D11
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

It is essential that White maintain a link with the marked stone
by pushing with 1 ...
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  VAR
  W 1 N17
  COM
  Failure.

  If White makes a checking extension with 1, ...
  ENDCOM
  B 2 D14
  COM
  ... Black will push up with 2 ...
  ENDCOM
  W 3 E14
  B 4 E13
  COM
  ... and 4, and, ...
  ENDCOM
  W 5 F14
  B 6 D12
  MARK \t@D11
  COM
  ... after Black 6, the marked white stone has become isolated
  and a black moyo on the left side comes into being.
  <=
  ENDCOM
  ENDVAR
B 2 C13
W 3 D13
COM
... and 3. These moves have increased Black's profit on the left,
but White has become thick in compensation.
ENDCOM
B 4 D12
COM
If Black 4 next, ...
ENDCOM
W 5 C12
COM
... White cuts with 5.
<=
ENDCOM