(;
GM[1]
SZ[19]
AW[dd][dp][jp][ri][qi][qf][pf]
AB[pq][pk][rj][qe][pd][nd][jd]
LB[ri:1]
C[Problem 83. Black to play.  

White 1 is a calm move which emphasises the security of her stones. How should Black continue ? ]
(;B[qj]
TE[2]
C[Correct Answer.  

Black should keep up the pressure on White by playing 1. ]
;W[pi]
C[If White 2, ... ]
;B[nj]
C[... Black continues the attack with 3, a move which also expands Black's influence in the lower right. <= ]
)
(;B[mp]
TE[2]
C[Correct Answer.  

Black could also extend to 1. ]
;W[qj];B[qk];W[rk];B[rl];W[sj]
C[If White secures her group with the sequence to 6, ... ]
;B[qm]
C[... Black can connect with 7. He is satisfied with his profit in the lower right. <= ]
)
)