(;
AB[qc][qd][od][ld][hc][ce][be][ef][eg][dh][dj][dk][cj][bj][cl][cm][cq][dp][ep][fp][gp][ho][ip][fn][fm][gm][gl][hl][ij][im][jm][kn][ko][jp][lp][lq][kq][qj][oj][lk][mm][qm]
AW[bd][cd][dc][ed][dg][ck][bk][dl][dm][dn][ek][fl][gk][hk][ik][jk][il][kl][co][dr][eq][fq][gq][iq][jq][jo][jn][in][hn][hm][gn][km][pq][qo][ql][qe][re][of][oh][qh]
C[White's response to Black's marked play?

"Go World", #32, Summer 1983, p. 29
Cho Chikun vs.  Kato Masao
21st Judan Title, game 5
Ishida Yoshio commentary.]
TR[qm]
(;
W[pm]
C[Fails.];
B[qn];
W[pn];
B[ro];
W[rl];
B[qp];
W[po];
B[qq]
C[After Black scoops out side
territory, Black has no more
weaknesses.]
)
    (;
    W[pl]
    C[Also fails.];
    B[rl];
    W[rk];
    B[qp];
    W[pp];
    B[ro];
    W[rp];
    B[rn]
    LB[qk:a][qq:b]
    C[A and B are miai for Black.]
    )
    (;
    W[rm]
    C[Correct.
White has no choice.
See the variations.
The game continued...];
    B[pm];
    W[pl];
    B[rn];
    W[rl];
    B[qn];
    W[ro];
    B[so];
    W[sp];
    B[sn];
    W[rq];
    B[om];
    W[rj]
    LB[nk:a]
    C[White is still behind, but at least
White can aim to attack at A.]
    )
)
