(;
AB[po][qo][ro][dp][pp][mq][oq][nr]
AW[qp][rp][jq][pq][or][qr]
PL[W]
C[White plays.

Source:
    Go World #20, p. 60
    Sakai Masanori 4p and James Davies]
(;
W[rr]
C[Simply defending the corner first is bad timing.];
B[os];W[pr];B[gq];W[op]
C[Now White can no longer force here.];
B[oo]
C[But now, with White's corner already fully alive, Black will ignore the cut to squeeze from the outside.];
W[np];B[mo];W[mp];B[lp];W[nq];B[no];W[oq];B[kq]
TR[rr]
LB[mr:A]
C[With this result, White is hurting badly on the outside.  And because White has A, White's marked stone has become a wasted move.]
)
    (;
    W[op]
    C[White should force here immediately.]
    (;
    B[nq]
    C[Black will definitely connect in sente, but ...];
    W[rr]
    TR[op]
    C[... then White can come back to defend the weak corner.  This 2-2 point is best.

Now White's marked stone is an effective cut that leaves aji.]
    )
        (;
        B[oo]
        C[Now this outside squeeze does not work as well.];
        W[np];B[mo];W[mp];B[lp];W[nq];B[no];W[oq]
        LB[rr:A]
        C[With White being alive in the corner without having played at A, Black is behind a move on the outside.]
        )
    )
)

