(;
AW[cd][dc][db][nc][qc][cb][bb][bd][ac][ce]
AB[pd][dd][pj][ec][fd][be][de][cf][dg][ld]
C[Black's response to the marked play?

Source:
    "All About the Pincer (2)"
    Takagawa Shukaku
    Go World #6, p. 43]
TR[qc]
(;
B[qd]
C[Blocking on this side is the correct direction.];
W[pc];B[od]
(;
W[oc];B[nd]
(;
W[mc];B[md]
LB[lc:A][fb:B]
C[And Black sets up an imposing position.

Note that Black could block at A instead: however, with the top open at B, Black cannot hope to seal off the top.]
)
    (;
    W[md]
    C[White can try to dent Black's wall.]
    (;
    B[me];W[mc];B[le];W[kc]
    C[But Black builds good thickness anyway.]
    )
        (;
        B[mc]
        C[White must keep in mind that Black might counterattack here.];
        W[me];B[mb]
        )
    )
)
    (;
    W[nd]
    C[White can also push up here.];
    B[oc];W[ob]
    (;
    B[pb]
    C[Black will follow this  standard sequence.];
    W[qb];B[nb];W[pa]
    (;
    B[ne];W[mb];B[mc];W[na];B[md];W[nb];B[of]
    LB[kc:A][fb:B]
    C[Black makes good outside thickness.  Black is not worried about White A, because the top is already open at B.]
    )
        (;
        B[mb]
        C[If Black likes to fight, pulling out here is also possible.];
        W[ne];B[rd];W[rc];B[pg]
        )
    )
        (;
        B[nb]
        C[But this move is a mistake in direction!];
        W[mb]
        C[White is happy to capture a stone.];
        B[pb];W[na];B[qb]
        TR[ld]
        C[Black takes some corner territory, but at the bigger expense of weakening the marked stone.]
        )
    )
)
    (;
    B[pc]
    C[Blocking on this side is not quite as good.  One possible sequence follows.];
    W[qd];B[pe];W[pb];B[ob];W[qb];B[oc];W[qf]
    LB[nd:A][fb:B][nb:C][kc:D]
    C[And now Black faces some unpleasant possibilities.

Black could defend at A, but that would be gote and overconcentrated.  And the top is still open at B.

But if Black tenukis here, White can force with C followed by the invasion at D.]
    )
)

