(;
GM[1]
SZ[19]
AW[dd][ec][df][dp][jq][jd][jg]
AB[pq][po][pd][md][fc][fd][gg]
LB[pj:A]
C[Supplement to Problem 45: Black's mistake.  

Instead of extending to A, ... ]
;B[hd]
TE[2]
C[... Black should have played 1. It is now White who has to make shape for her stones. ]
;W[le]
C[White 2 ... ]
;B[me];W[lf]
C[... and 4 are the usual way to do so, but ... ]
;B[ng]
LB[me:3]
C[... these moves provoke 3 and 5, enabling Black to begin building a moyo in the upper right. <= ]
)
)
