(;
AB[ra][rc][qc][pb]
AW[sd][rd][qd][pc][oc][nc][oe]
C[White plays.]
(;
W[sb];B[sc]
(;
W[pa]
C[A classic tesuji and the only move!];
B[ob];W[nb]
(;
B[qa];W[rb];B[qb];W[oa];B[na];W[oa]
C[success]
)
    (;
    B[oa];W[qb]
    C[Double atari]
    )
)
    (;
    W[qb]
    C[Bad timing, because White throws away the threat of the double atari on this point.];
    B[rb];W[pa]
    C[Too late.];
    B[ob];W[nb];B[qa]
    C[Black makes 2 eyes.]
    )
)
    (;
    W[pa]
    C[Bad timing];
    B[ob];W[sb]
    C[Too late];
    B[rb]
    C[Black can dodge to here!];
    W[sc];B[qa]
    C[Black makes 2 eyes.]
    )
    (;
    W[ob]
    C[Too slow.];
    B[pa]
    LB[sb:A][sc:B]
    C[Black instantly makes good eye-shape.  A and B are miai for Black.]
    )
)

