(;
GM[1]
SZ[19]
AW[fc][fd][jc]
AB[dd][ec][df][mc][pd][qj]
C[Problem 121. White to play.  

How should White invade the black position on the right side ? ]
(;W[qd]
LB[re:C][qf:B][qc:A]

TE[2]
C[Correct Answer.  

This time, instead of the 3-3 point at A, White should invade by attaching with 1. White could also invade at B or C. <= ]
;B[qc];W[qe];B[pc];W[qh];B[oj];W[oh]
C[The moves to 7 are joseki. White has succeeded in invading Black's moyo. <= ]
)
(;W[qf]
TE[2]
C[Correct Answer.  

Also correct. <= ]
)
(;W[re]
TE[2]
C[Correct Answer.  

Also correct. <= ]
)
)