(;
GM[1]
SZ[19]
AW[ch][jc][lc][pc][qe][qf]
AB[dc][cf][hc][nc][pe]
LB[qe:2][pe:1]
C[Problem 85. Black to play.  

Against the shoulder hit of Black 1, White responds with 2. What should Black do now ? ]
(;B[pb]
TE[2]
C[Correct Answer.  

Black 1 is a brilliant move. However White answers, Black has an effective continuation. <= ]
)
(;B[pd]
C[Failure.  

Forcing with Black 1 ... ]
;W[qd];B[oc]
C[... and 3 is unimaginative. ]
;W[pb]
C[White's corner territory becomes large and impregnable after White descends to 4. <= ]
)
)