(;
GM[1]
SZ[19]
AW[dd][cg][co][cp][dq][fq][rp][qm][qj]
AB[ci][dm][cn][do][mq][pp][pd][nc]
TR[rp]
C[Problem 64. Black to play.  

After White has played the marked stone, what should Black do ? ]
;B[fc]
TE[2]
C[Correct Answer.  

Black should approach with 1. ]
(;W[dc]
C[If White defends the corner with 2, ... ]
;B[jd]
C[... Black will extend to 3, making a moyo in the upper right. <= ]
)
(;W[jc]
LB[fc:1]
C[Variation.  

White might pincer the black stone at 1 with 2. ]
;B[cc]
C[In that case, Black must take the corner territory with the sequence from 3 ... ]
;W[dc];B[db];W[eb];B[cb];W[ec];B[be]
C[... to 9. Black should be satisfied with this result. <= ]
)
)