(;
AB[qj][rk][ql][qm][pn][no][np][oq][pq][qr][rr][on][nq]
AW[rl][rm][qn][rn][qo][op][pp][qq][rq]
C[Black plays.

Source:
    From a Korean life and death pamphlet.]
(;
B[sq]
C[The only move!];
W[sp];B[sl]
C[The 2nd consecutive hane, and again the only move!]
(;
W[ro];B[qp];W[rp];B[po]
C[After 2 hanes and a throw-in, White only has 1 eye.]
)
    (;
    W[sm]
    C[Trying to expand the eye space doesn't work either.];
    B[so];W[sr];B[po]
    C[Again White only has 1 eye.]
    )
)
    (;
    B[sl]
    C[Bad timing.  Black cannot change the order of the hane moves.];
    W[rp]
    LB[po:A][so:B]
    C[Now White A and B are miai to make life.];
    B[po];W[so]
    C[White has 2 eyes.]
    )
    (;
    B[so]
    C[Black takes the vital point for forming 2 eyes, but ...];
    W[sp];B[po];W[qp];B[ro];W[sl];B[sn]
    C[... White has enough eye space to create a seki.]
    )
    (;
    B[rp]
    C[Fails];
    W[sp];B[so];W[sq];B[ro];W[sl]
    C[White lives with territory.]
    )
    (;
    B[po]
    C[Fails];
    W[so]
    C[White's shape immediately forms 2 eyes.]
    )
    (;
    B[qp]
    C[Fails];
    W[rp];B[so];W[po]
    C[White lives with territory.]
    )
    (;
    B[sp]
    C[Fails];
    W[sq];B[so];W[sl]
    C[White lives easily.]
    )
)

