(;
AB[nd][qd][le][pe][pl][cn][dn][do][fp][pq]
AW[ec][mc][oc][cd][pn][co][cp][qo][dq][fr]
C[Black's best response to the marked play?  A, B, or C?

Source:
    Go World #21, p. 45
    "The Great Joseki Debate",
    Honda Kunihisa 9P]
TR[pn]
LB[qp:A][mp:B][oo:C]
(;
B[qp]
C[Starting this joseki doesn't relate well to Black's overall position.];
W[rp];B[rq];W[pp];B[qq];W[op];B[nq];W[qj]
C[Now White can invade the right side here.];
B[qm];W[np]
C[White pushes to give this group a strong shape.];
B[mq];W[mp];B[lp];W[lo];B[ko];W[ln]
TR[fr]
C[White's marked stone reduces the effectiveness of Black's lower right stones.];
B[ok]
C[Black runs out to defend this group, while attacking White's lone stone, but ...];
W[ph]
C[... White can jump here, threatening A to settle nicely.

If Black prevents A, White can run out to the center.]
LB[qg:A]
)
    (;
    B[oo]
    C[This knight's move doesn't work well with Black's overall position either.];
    W[on]
    C[White will push out.];
    B[no];W[nn];B[mo];W[mn]
    LB[lo:A][pj:B]
    C[Normally, White wouldn't push from behind here, but now A and B are miai for White.

Black's opening is in ruins.]
    )
    (;
    B[mp]
    C[The correct choice.  Black chooses a move that stresses the right side and center, where Black has prospects for development.]
    (;
    W[rq]
    C[Sliding into the corner is natural, but ...];
    B[nm]
    C[... Black's knight's move is ideal.  This move ties all Black's stones together, and brings the outside influence to create a vast potential.];
    W[di]
    C[White will probably extend to here.]
    (;
    B[qm]
    C[Just one obviously good reply.]
    )
        (;
        B[kc]
        C[Attacking the top right is also good.]
        )
        (;
        B[fi]
        C[Or Black might also cap the left side here.]
        )
    )
        (;
        W[nn]
        C[To avoid being sealed in, as in the previous variation, White may jump out instead.];
        B[oo]
        C[Black first forces here to protect the bottom.];
        W[on];B[nl];W[ln];B[kp]
        C[Black is happy to to make territory while attacking.]
        )
        (;
        W[qj]
        C[White can also try to invade the right side.];
        B[qm]
        C[Prevents White from linking up.];
        W[qg];B[rq]
        C[Black retaliates by making territory while denying a base to White's lower right group.];
        W[nn];B[oo];W[on];B[ok];W[ln];B[dh]
        C[Now Black can extend on the left side.  White has little territory and many weak stones.

The game looks interesting for Black.]
        )
        (;
        W[qq]
        C[Another possibility, but ...];
        B[qr];W[pp];B[oq];W[rq];B[dh]
        C[... although White's lower right is stronger, Black's lower right also has a settled shape.

Now taking the large left side point gives Black a satisfactory opening.]
        )
    )
)

