(;
GM[1]
SZ[19]
AW[jc][kd][nc]
AB[dd][hc][lc][pd][pf]
LB[kd:1]
C[Problem 7. Black to play.  

White plays a diagonal move from the left. What is Black's response ? ]
;B[pc]
TR[lc]

TE[2]
C[Correct Answer.  

Taking the corner with Black 1 is enough. White must still deal with the marked black stone. ]
;W[ld]
C[After White 2, ... ]
;B[nb]
C[...Black still has moves such as 3 to annoy White with. <= ]
)
)