(;
AB[pd][dd][fd][jc]
AW[cf][hc]
C[Black's response to White's marked play?

Source:
    Go World #38, Winter 1984-85, p. 40
    Practical Tactics and Tesujis, Rin Kaiho]
TR[hc];
B[id]
C[This kind of position often arises in handicap games, in which Rin recommends that Black plays simply to build thickness.];
W[ec]
(;
B[ed]
(;
W[fc];B[dc]
C[Black should just try to keep things simple by blocking here.];
W[hd];B[he];W[jb];B[kb];W[ib];B[kc];W[gb];B[gd]
C[White lives, but Black builds nice thickness.]
)
    (;
    W[dc]
    C[A natural-looking but wrong move.];
    B[cc];W[fc];B[gd]
    C[The vital point.];
    W[cd];B[ce];W[bd];B[be];W[bc];B[cb];W[bb];B[gc];W[gb];B[hb];W[fa];B[df]
    C[White has captured a big corner, but Black's overwhelming outside thickness would be enough to win the game.]
    )
)
    (;
    B[fc]
    C[Black cannot block here.];
    W[fb];B[gb];W[eb];B[gc];W[ed];B[ee];W[de]
    C[And Black suffers a severe setback in the corner.]
    )
)

