(;
GM[1]
SZ[19]
AW[dd][jd][nc][qo][dp]
AB[pd][pf][pk][pq][jp]
LB[qo:1]
C[Problem 55. Black to play.  

White 1 is a bad move. How should Black answer ? ]
(;B[qp]
TE[2]
C[Correct Answer.  

Attaching with Black 1 is the only move. It robs White of her base and, ... ]
;W[po]
C[... when White stands at 2, ... ]
;B[np]
C[... Black launches a powerful attack on the two white stones with 3. <= ]
)
(;B[op]
C[Failure.  

Black 1 is a lukewarm move, it is lacking a plan. ]
;W[rq]
C[White is happy to slide to 2, making a base for her stones in the lower right. <= ]
)
)