(;
AB[gd][ge][ic][id][jb][kb][kc][pd]
AW[dc][ce][jd][ie][he][jc][kd][lc][lb][me][je]
LB[hd:A][gc:B]
C[Black plays.

Source:
    Go World #17, p. 58
    Practical Tactics and Tesuji
    Rin Kaiho 9P]
(;
B[fc]
C[Many kyu players might think of this defense, but ...];
W[gb]
C[... a dan player would find this powerful move.]
(;
B[fb]
C[Black can block here, but ...];
W[hc]
LB[hd:A][ib:B]
C[... after this diagonal tesuji, Black has no defense, because A and B are miai for White.]
)
    (;
    B[hb]
    C[Because of the previous variation, Black has to defend, but ...];
    W[fb];B[gc];W[ec]
    LB[hd:A]
    C[... White's placement stone slips out while taking territory from Black.  And next, White can attack at A.]
    )
)
    (;
    B[gb]
    C[This move certainly defends, but is too timid.  Black has no follow-up.]
    )
    (;
    B[fb]
    C[This knight's move is the best.  Black defends the group with territory, and also threatens White's corner.];
    B[db]
    C[For example, Black has this severe follow-up.]
    )
)

