(;
AB[kc][lc][jd][md][nd][oe][of][jf][oh]
AW[ic][oc][od][hd][ld][le][qd][me][ne][qf][mg]
C[Black plays.

Source:
    "American Go Journal", v35,n1 
    Adapted from "Go Review", May 1970, Rin Kaiho's "Go Achievement Test"]
(;
B[mc]
C[Black recognizes that giving up the 2 stones is unthinkable, but this solid connection is rather inefficient.  Black can do better.]
)
    (;
    B[mb]
    C[This stylish connection makes a good shape, but ...];
    W[nb]
    C[... this forcing move threatens a snapback.];
    B[mc]
    C[Black has to make the solid connection anyway.  And White has blocked a later sente corner reduction.]
    )
    (;
    B[nb]
    C[The best play to connect.];
    W[ob]
    C[For example ...];
    B[nc]
    C[Compared to the other variations, Black's group is not only safer, but also has bigger territory. ]
    )
)

