(;
AB[cb][db][cc][be][bf][cf][dg][dh][eh][ef][fc][jd][qd][re][qg][pg][ql][pq][qp][rq][qo][po]
AW[eb][ec][dc][dd][ce][de][df][eg][fg][ff][lc][od][qc][rc][pf][qr][rr][qq][pp][op][qn][cq]
TR[rr]
C[Black's response to the marked stone?

Source:
    "Go World", #32, Summer 1983, pp. 32-33
    1st Go World Invitational Cup
    Rob van Zeijst  vs.  Helmut Hasibeder 6-dan
    Commentary:  Kanda 6-dan and van Zeijst]
(;
B[mp]
C[A mistake in direction from the actual game.]
(;
W[oo]
C[The correct response from the game.];
B[pn];
W[on];
B[om];
W[nm];
B[ol];
W[nq]
C[White's resolute play builds thickness,
and overconcentrates Black.]
)
    (;
    W[no]
    C[Joseki, but too gentle on Black.];
    B[pn];
    W[mo];
    B[kp];
    W[mq];
    B[dn];
    W[fp];
    B[lq];
    W[mr];
    B[hq];
    W[fq];
    B[fn];
    W[ho]
    )
)
    (;
    B[no]
    C[Correct.];
    W[oo];
    B[on]
    (;
    W[oq];
    B[nn]
    C[And Black builds a nice moyo.]
    )
        (;
        W[nn]
        C[White might try this cut.];
        B[om]
        C[After this Black extension, the fight that
will follow should be OK for Black.]
        )
    )
)
