(;
GM[1]
SZ[19]
AW[dd][df][cl][dn][do][dp][dq][jp][mp][mo][no][qi][pj][oj][ok][nh][qf]
AB[cq][cp][bn][cn][cr][np][op][pq][pn][pl][pk][qj][rj][re][of][pd][jd][fc]
LB[ge:A][cm:B][om:C]
C[Problem 138. White to play.  

White has mapped out a huge moyo at the bottom. How should she now play ? ]
(;W[om]
TE[2]
C[Correct Answer.  

Before doing anything else, White should peep at 1. ]
;B[on]
C[Black must defend with 2 ... ]
;W[nm];B[pm]
C[... and 4 or else White will wipe out Black's territory on the right. ]
;W[cm]
C[Next, White protects her weakness at 5. ]
;B[ih]
C[If Black 6, ... ]
;W[ge]
C[... White plays 7. <= ]
)
(;W[ge]
C[Failure.  

If White jumps to 1, threatening Black's territory at the top, ... ]
;B[dm]
C[... Black will cut through with 2 and ... ]
;W[cm];B[em];W[dj];B[fo];W[gq];B[gm];W[hp];B[fj]
C[... wipe out White's moyo with the sequence to 10. (See Get Strong at Joseki 3, Problems 153, 158, 163, and 168.) <= ]
)
)