(;
AB[cr][cq][dq][bo][jp][ip][hp][fn][fm][gl][dl][cl][ck][cj][di][dh][dg][fg][fi][hg][ce][fe][ge][hd][hc][hb][jd][kd][ga][fb][ea][db][ec][cb][pd][lf][hi]
AW[pf][pj][pp][mh][kh][jg][je][ie][he][gd][gc][gb][bb][cc][dc][ed][fd][ee][de][cf][cg][ch][ci][ei][dj][dk][fk][bp][do][dp][fp][eq][dr][hq][iq][gn]
C[Black's response to White's marked play?

Source:
    Go World #35, Spring 1984, p. 39
    Awaji Shuzo  vs.  Kataoka Satoshi]
TR[bp]
(;
B[cp]
C[Inferior.];
W[co]
C[White has the following excellent squeeze
sequence.];
B[bn];
W[br]
(;
B[bq];
W[cs];
B[ap];
W[fr]
)
    (;
    B[er]
    C[If Black tries to deviate here...];
    W[bq];
    B[ds];
    W[bs];
    B[fq];
    W[ep];
    B[cs];
    W[fr];
    B[fs];
    W[gr]
    C[And Black has a terrible ko.];
    B[ap];
    W[gs];
    B[aq];
    W[es]
    )
)
    (;
    B[jq]
    C[Correct.

Black reverts to building thickness.];
    W[bn];
    B[er];
    W[fr];
    B[ds];
    W[gp]
    C[And Black retains a slight overall lead.]
    )
)
