(;
AB[dd][jd][nd][pd][dj][pj][ok][dp][jp][np][op][pp][qq]
AW[qf][nj][pm][po][ro][qp]
C[Black's response to White's marked play?

Source:
    American Go Journal, Vol. 35, No. 2, pp. 35-36
    Originally from Go Review X, May 1970.]
TR[ro]
(;
B[nk]
C[Taking time to strengthen these middle right stones is what White wants.];
W[rq]
C[White jumps at the chance to settle the weak lower right stones, while taking profit.];
B[qr]
C[Black has lost the chance to pressure the lower right stones.]
)
    (;
    B[rp]
    C[Giving atari here 1st is better than the previous variation, but ...];
    W[qo];B[nk];W[rq];B[rr];W[sp];B[qr]
    C[... again White gains life for the lower right stones.]
    )
    (;
    B[rq]
    C[Descending here is the most severe move.  Now White's lower right stones are baseless and still weak.  As a bonus, Black has secured the lower right corner.];
    W[nn]
    C[Now when White runs out to the center, ...];
    B[nk]
    C[... Black can push worry-free here to keep pressure on White's stones at the top and at the bottom.

In the previous variations, Black's push here would be just a passive defense.]
    )
)

