(;
GM[1]
SZ[19]
AW[dd][dp][jp]
AB[pq][pk][pd][jd]
LB[dj:C][nc:A][qf:B]
C[Problem 71. White to play.  

Where should White play in this position ? Should she make an approach move at one of the points A or B, or should she map out a moyo at C ? ]
(;W[qf]
TR[jd][pk]

TE[2]
C[Correct Answer.  

White should approach with 1. The marked stone on the right is more widely spaced than the one at the top, so White has more room to expand. <= ]
)
(;W[nc]
C[Failure.  

White 1 is in the wrong direction. ]
;B[oc];W[nd];B[pf]
C[After 4, ... ]
;W[ld]
C[... White has to play a narrow extension with 5. ]
;B[jf]
C[Black jumps out into the center with 6 and is satisfied. <= ]
)
(;W[dj]
C[Failure.  

Making a sanren-sei on the left side with 1 is quite appealing, but ... ]
;B[pf]
C[... 2 is too good a point to allow Black to take. With one move, Black solidifies his moyo in the top right. <= ]
)
)