(;
GM[1]
SZ[19]
AW[jc][nc][pc]
AB[dd][hc][lc][pd][pf]
LB[pc:1]
C[Problem 22. Black to play.  

How does Black respond to White's attachment at 1 ? ]
;B[qc]
TE[2]
C[Correct Answer.  

Black 1 ... ]
;W[od]
(;B[pe]
C[... and 3 are a simple way of playing. Later, ... ]
;W[qb]
C[... White can start a ko by playing 4 ... ]
;B[pb];W[ob]
C[... and 6. <= ]
;B[oc])
(;B[pb]
C[Variation.  

Black 3 here is very strong, but it becomes very complicated. <= ]
)
)