(;
AB[nb][ob][qb][qc][pc][rc]
AW[pa][pb][kc][mc][nc][oc][sc][pd][qd][rd][rf]
C[Black plays.

Source:
    From the yose volume of Gokyo Seimyo, a nearly 200 year old problem set.]
(;
B[sb]
C[Fails.];
W[qa]
(;
B[rb];W[ra];B[sd];W[mb]
)
    (;
    B[sd];W[ra]
    )
)
    (;
    B[ra]
    C[Fails.];
    W[sb]
    (;
    B[oa];W[mb]
    )
        (;
        B[mb];W[lb]
        )
    )
    (;
    B[oa]
    C[What an ugly shape!  But the only move.]
    (;
    W[mb];B[sb]
    LB[ra:A]
    C[White cannot prevent Black from making a 2nd eye around A.]
    )
        (;
        W[sb];B[mb];W[lb];B[ma]
        )
        (;
        W[rb];B[qa];W[mb];B[sb];W[sa];B[ra]
        )
    )
)

