(;
AB[qd][qe][pe][od][nd][nc][mb][lc][rf][qg]
AW[qc][pc][oc][ob][nb][pd]
C[Black plays.

Source:
    Qi Jing Zhong Miao, an ancient classic tsumego collection.]
(;
B[sb]
C[Correct.  This bizarre move is the only way to kill outright.]
(;
W[rd]
C[The toughest defense, but ...];
B[sd]
C[... Black has this nice connection tesuji.];
W[se]
C[White's hane here cannot cut off the corner stones.];
B[sc]
LB[re:B][rc:A]
C[A and B are miai for Black.];
W[rc]
C[For example ...];
B[re];W[rb];B[sf]
C[White has a dead shape.];
W[pa];B[na];W[qb];B[ra]
)
    (;
    W[rc]
    C[No better.];
    B[sc];W[rd];B[sd]
    C[Transposes to the previous variation.]
    )
)
    (;
    B[rc]
    C[Most kyu players might think that the best that Black can do is this hane.];
    W[rb]
    (;
    B[sb];W[rd];B[sd]
    C[But Black only has a ko.  And White takes 1st.]
    )
        (;
        B[rd]
        C[Even worse.];
        W[sb]
        C[White has a must-know live shape.]
        )
    )
    (;
    B[sc]
    C[Looks strong, but ...];
    W[sb]
    C[... White has this sacrifice tesuji.];
    B[rb]
    C[Black's only hope to kill, but ...];
    W[rc];B[sd];W[ra]
    C[... White has this must-know corner tesuji for a ko.]
    )
    (;
    B[sd]
    C[A common move in these kinds of corner tsumego, but ...];
    W[rc];B[sc];W[sb];B[rb];W[ra]
    C[Again, White has this corner tesuji for a ko.]
    )
    (;
    B[rb]
    C[This placement looks stylish, but ...];
    W[rc]
    C[... the reader can easily verify that White has enough space to live.]
    )
)

