(;
GM[1]
SZ[19]
AW[cj][dd][dp][dn][hp][iq][hq][jq][lq][qi]
AB[fq][fo][go][ho][ip][jp][kp][mo][pp][pd]
TR[cj]
C[Problem 25. Black to play.  

White has just extended along the left side with the marked stone. What should Black do ?  

[You will find a supplement to this Problem Diagram as "Problem 139"] ]
;B[mr]
TE[2]
C[Correct Answer.  

Black should attack the white stones at the bottom with 1. ]
;W[lr];B[nq];W[gr];B[fr];W[kq]
C[White can live in the sequence to 6, but Black ends in sente, so ... ]
;B[pj]
C[... he can continue by building a moyo in the center by making a shoulder hit at 7. <= ]
)
)