(;
AW[bb][bc][bd][cd][dc][db][ca][ec][nc][ne][kd]
AB[lc][pd][pf][ce][dd][ed][df][gd][fc][eb]
C[Black's response to the marked play?

Source:
    "All About the Pincer (2)"
    Takagawa Shukaku
    Go World #6, p. 42]
TR[kd]
(;
B[jc]
C[Correct shape, but too mild.];
W[kc];B[kb];W[ld]
TR[lc]
C[White pushes and extends to build thickness.

Black's original marked pincer stone has failed.]
)
    (;
    B[kc]
    C[Unsatisfactory.];
    W[ld]
    C[White jumps at the chance to defend here.];
    B[jd];W[mc];B[je];W[kf]
    C[White has fixed up his shape.  Black is not satisfied.]
    )
    (;
    B[ld]
    TR[kd]
    LB[pb:A]
    C[Correct.  This area is Black's sphere of influence, so resisting strongly here is natural.

As you will see, this response is so strong that White's original marked play is unreasonable, i.e., White should have first strengthened his group by sliding to A.];
    W[le];B[ke]
    C[Cutting here is a good move.  A standard sequence follows.];
    W[kc];B[kb];W[je];B[kf];W[lf]
    (;
    B[ic]
    LB[kg:A]
    C[When the ladder at A is favorable for Black, Black can jump to here and White's position is in pieces.]
    )
        (;
        B[jf]
        C[When the ladder favors White, Black can turn here.];
        W[jb];B[mb];W[ka];B[lb];W[jc];B[ob]
        C[And although Black seems weak, White is really the one in big trouble.

See the following variations for possible sequences.]
        (;
        W[oc]
        C[White can try to push through and cut here.];
        B[pb];W[nb];B[na];W[pc];B[qc];W[qd];B[rc];W[pe];B[rd];W[qe];B[ie]
        C[White's right side group is OK, but Black takes big profit by capturing the 6 stones at the top.]
        )
            (;
            W[nb]
            C[White can also try another push and cut sequence.];
            B[na];W[pc];B[oc];W[od];B[pb];W[qc];B[qb];W[qd];B[pe];W[rb];B[md]
            C[But Black can be confident after taking the vital point here.  White has 3 weak groups.]
            )
            (;
            W[ie]
            C[The other variations are too good for Black, so White may have to extend here.];
            B[if];W[he];B[gg];W[gb];B[fb];W[hc]
            C[White can live in gote, but ...];
            B[oc]
            C[... Black takes profit here, and can aim at attacking the 4 weak stones.]
            )
        )
    )
)

