(;
AB[qe][qh][nd][nc][ne][ld][ci][cp][eq]
AW[cc][ed][jd][qd][pc][od][oe][of][qq]
TR[qd]
C[Black's response to the marked play?

Source:
    American Go Journal, Winter 1993
    by Ye-hui Wang 5p]
(;
B[mg]
C[The correct play is this knight's move to reinforce the group on the left.];
W[oh]
C[After White jumps out ...];
B[qk]
LB[qb:A]
C[... Black extends to also reinforce the right side group.

This sequence has the added advantage of preserving the possibility of the corner invasion at Black A.]
)
    (;
    B[re]
    C[In the actual game, Black incorrectly made the obvious descent to strengthen the right side.];
    W[rd]
    C[But White is happy to also descend to strengthen the corner group.];
    B[qk]
    LB[qb:A]
    C[Naturally, Black then extends down the right side.

The big problem now is that Black no longer has the placement at A to strengthen the 4 Black stones on the left or to attack the White corner stones.]
    )
)

