(;
GM[1]
SZ[19]
AW[dd][ci][dk][dl][dn][dp][gp][ip][lp]
AB[fq][fp][fo][fm][ek][ej][in][pq][pd]
LB[ln:A][ir:D][np:B][po:C]
C[Problem 147. Black to play.  

The white stones at the bottom are weak, so Black must find a good way to attack them. Note that Black gave White territory on the left in order to get a thick  position in the center. ]
(;B[ln]
TE[2]
C[Correct Answer.  

Black should play a large-scale move by capping at 1. ]
(;W[dr]
LB[gq:A]
C[White 2 is a good move because it prepares for White A, which threatens to link up or help her group at the center bottom to make eyes. <= ]
)
(;W[nq]
C[If White 2 here, ... ]
;B[po]
C[... Black 3 has a good feel to it. <= ]
))
(;B[np]
C[Failure.  

Black 1 is very bad because ... ]
;W[ln]
C[... it drives White into the center, compromising Black's thickness there. <= ]
)
)