(;
AB[mc][pc][pd][nd][ne][nf][od][qe]
AW[nc][oc][kd][md][me][pf][qf]
PL[W]
TR[mc]
C[White's response to the marked cut?

Source:
    American Go Journal, v36 #3, p. 34
    Adapted originally from "Go Review" magazine.]
(;
W[lc]
C[One possibility is to sacrifice the 2 stones to close off the top side.];
B[mb];W[lb];B[nb];W[ma];B[ob]
C[And White keeps sente.  But White can do much better.]
)
    (;
    W[mb]
    C[White might have chosen the previous variation, because this atari might look risky or even downright bad.];
    B[lc];W[lb];B[kc]
    (;
    W[kb]
    C[White can keep pushing, but ...];
    B[jc];W[pb];B[qb];W[ob];B[jb];W[ka]
    C[... although White can live at the top, this result is a disaster for White.

White lives small in gote, while the 3 marked stones have now almost become useless.]
    TR[kd][md][me]
    )
        (;
        W[jc]
        C[But this hane is exquisite.];
        B[kb];W[jb]
        C[White captures 4 stones!  An incredible result.]
        )
    )
)

