(;
AB[db][fc][ic][pd][qp][oq][cn]
AW[dd][cc][cf][cl][dp][qm][qj]
TR[cl]
C[Black's response to the marked pincer?

Source:
    "Go in the 21st Century"
    Yoda Norimoto 9P vs. Yoo Chang-heok 9P
    Commentary:  Go Seigen 9P
    American Go Journal, Vol. 31, No 2, p. 19]
(;
B[fp]
C[Yoda's game move, but Go Seigen says that with this move Black goes wrong.];
W[dn];B[dm];W[cm];B[dq];W[co];B[cq]
C[Black follows joseki to here, and even comes out ahead locally.  But ...];
W[qg];B[bn]
C[... after Black fixes the lower left shape with a few forcing moves, ...];
W[bo];B[en];W[do];B[nd];W[hq]
C[... White comes back to play first on the bottom.];
B[fr];W[kq]
C[Now, not only are White's 2 lower middle stones on ideal points, but also Black does not have any good moves to develop the left side.  Globally, Black is not better.]
)
    (;
    B[cq]
    C[Go Seigen gives this sequence as the correct way to continue.];
    W[cp];B[dq];W[ep];B[bp];W[bo];B[bq];W[co];B[fq];W[go];B[gq]
    C[Now Black makes miai of a big extension at the bottom and an effective play against White's left side framework.]
    (;
    W[di]
    C[If White surrounds left side territory here, ...];
    B[ip]
    C[... Black makes this good extension on the bottom.]
    )
        (;
        W[io]
        C[If White tries to avoid the previous variation by extending at the bottom, ...];
        B[dk]
        C[... now Black does have this good left side shoulder hit.]
        )
    )
)

