(;
GM[1]
SZ[19]
AW[qj][dd][cp]
AB[oc][qd][pp]
TR[qj]
C[Problem 2. Black to play.  

This time the marked white stone is under the star point. In which direction should Black attack ? ]
(;B[qh]
TE[2]
C[Correct Answer.  

The checking extension of Black 1 is the correct direction. The distance from the small knight enclosure is perfect and Black 1 and ... ]
;W[qm];B[qo]
LB[mq:A]
C[... 3 put severe pressure on White's stones. Later Black will aim to enclose the corner with A. <= ]
)
(;B[ql]
C[Failure.  

Black 1 is the wrong direction. ]
;W[qg]
C[White extends to 2 and, since this stone is two spaces from Black's corner enclosure, White's stones are not under much pressure. Moreover, Black's position below is thin. <= ]
)
)