(;
GM[1]
SZ[19]
AW[ce][cq][pp][rc][qc][pd][qe][od][ne][nb][nc]
AB[qd][nd][md][mc][mb][oc][ob][pc][qb]
C[Problem 93. Black to play.  

Black has made a thick position in the top right. He must now prevent White from making a corner enclosure in the upper left. How should Black approach the white stone there ? ]
(;B[ed]
TE[2]
C[Correct Answer.  

The high approach of Black 1 works best with Black's thick position in the upper right. ]
;W[dc];B[ec];W[dd];B[ee];W[df];B[fg]
C[Even though White gets the territory in the corner, Black maps out a moyo at the top with the sequence to 7. <= ]
)
(;B[dc]
C[Failure.  

The usual approach move at 1 is not good. ]
;W[ed]
C[White presses Black in a low position with 2 ... ]
;B[ec];W[fd]
C[... and 4. ]
;B[gc]
C[After 5, ... ]
;W[dj]
LB[gd:A]
C[... White can map out a moyo on the left side with 6 or she can continue to press the black stones with A. <= ]
)
)