(;
AB[oo][po][qo][mp][np][op][qp][qq][qr][lq][lr][nq][rq][sq]
AW[nn][on][pn][qn][lo][no][ro][kp][kq][kr][pp][pq][pr][mq][mr][oq][nr][rr][rs][qs][ss]
C[Black plays.]
(;
B[ns]
C[An amazing move, becase this tesuji is the only move to take advantage of White's liberty shortage.

Black must capture the 4 corner stones with atari to live.]
(;
W[lp];B[or]
C[Another counter-intuitive throw-in.];
W[os];B[sr];W[ms];B[ps]
C[Atari.];
W[qs];B[rs]
)
    (;
    W[or]
    C[If White takes away the throw-in, ...];
    B[lp];W[ls];B[ms];W[ks];B[sr];W[os];B[ms]
    C[White cannot wiggle out of Black's capture with atari of the 4 corner stones.]
    )
    (;
    W[ms];B[os]
    (;
    W[lp];B[sr];W[or];B[ps]
    C[Again, Black captures with atari.]
    )
        (;
        W[or]
        C[White making an eye here doesn't help.];
        B[ls];W[ps];B[lp]
        C[Black has enough outside liberties to capture the corner.]
        )
    )
)
    (;
    B[sr]
    C[The obvious move fails.];
    W[or]
    (;
    B[ps];W[rs]
    )
        (;
        B[ms];W[lp]
        )
    )
    (;
    B[lp]
    C[Too slow.];
    W[ls];B[ns]
    C[Too late.];
    W[ms];B[os];W[or]
    C[Black has nothing.]
    )
    (;
    B[ls];W[os];B[ms];W[lp]
    C[Black has nothing.]
    )
    (;
    B[os]
    C[Look promising, but ...];
    W[or];B[lp];W[ls];B[ps];W[ns];B[ps];W[ks]
    C[Black has nothing.];
    B[sr];W[rs]
    )
)

