EVENT
BOARDSIZE 19
SETUP W D16 D10 D4 Q17 P17 O16 K16 
SETUP B K10 K4 Q4 Q10 Q16 Q14 R17 R18 
COM
Problem 157. White to play.  

When Black occupies the central star point, he has staked out
a huge moyo in the lower right. How should White counter it ?
ENDCOM
W 1 O14
MARK A@M16
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

White should jump to 1. This move defends against White's weak
point of A, ...
ENDCOM
  VAR
  W 1 G4
  COM
  Failure.

  It is premature to play White 1 without any preparation.
  ENDCOM
  B 2 O14
  COM
  Black will jump to 2, ...
  ENDCOM
  W 3 M16
  COM
  ... forcing White to defend with 3.
  ENDCOM
  B 4 O4
  COM
  Now Black solidifies his moyo with 4.
  <=
  ENDCOM
  ENDVAR
B 2 Q12
COM
... forces Black to answer at 2, and expands White's moyo at
the top.
ENDCOM
W 3 G4
COM
White can now extend to 3.
<=
ENDCOM