(;
AB[dc][cd][fc][dj][dp][cp][eo][fo][gm][gp][gq][hr][gs][iq][ip][pp][qp][rp][qq][np][no][mq][lq][lr][nm][pd][qd][qe][qf][pf][qg][ph][nh][ni][oi][oj][pj][qi][ql][nl][ml][mk][lk][lj][bd]
AW[cc][dd][kd][hc][dg][gk][bq][cq][go][fp][fq][fr][er][gr][jp][lo][mr][nq][oq][qr][rq][rr][qn][om][ok][nk][nj][mj][mi][mh][ng][of][oe][pe][od][pc][mm][ll][kk][ce][bc][pg][og][oh]
TR[bc]
C[Black's response to the marked play?

Source:
    American Go Journal, Winter 1991, Vol. 25, No. 1, p. 30
    "Masterpieces of Handicap Go"
    Eio Sakata (age 14)  vs.  Go Seigen 9p]
(;
B[hd]
C[In the game, the youthful Sakata made this unappealing move.];
W[ic]
C[When White simply pulls back, Black has lost his chance to cleanly settle his top left group and take the lead without complicated fighting.];
B[db]
C[Black vainly tries to create eye-space.];
W[cb];B[be];W[cf];B[de];W[ed];B[fe]
C[The only possibility.];
W[bf]
TR[ed][dd]
C[Black can squeeze the 2 marked stones, but amazingly, Black still doesn't even have one eye!

The omitted subsequent moves in the real game are almost surely incomprehensible to anyone reading this.  Sakata managed to barely make his Black group live.  But even still, Go Seigen had to make a mistake in the endgame to let Black win by a couple points.]
)
    (;
    B[hb]
    C[Black should have attached here to settle his group immediately.]
    (;
    W[ic];B[db]
    C[Already Black has better eye-shape than in the game.];
    W[cb];B[be];W[cf];B[ed];W[de];B[ib];W[jb];B[gc]
    LB[ca:A][ch:B]
    C[The sequence to here is straightforward.
Black's shape is good, and Black has both the hane at A and the peep at B.

White's chances of winning in this variation would be much less.]
    )
        (;
        W[ib]
        C[White cannot hope to hane here.];
        B[ic]
        C[The technique of this cross-cut is instructive.];
        W[gb];B[hd]
        C[Black sacrifices a stone for outside moves.];
        W[gc];B[gd]
        C[Now White is the one in trouble.  Black has several useful forcing moves in the area.];
        W[id]
        C[For example, if White cuts here, ...];
        B[de]
        C[... Black switches to the other side.];
        W[ed];B[be];W[cf];B[ee]
        C[And White is unsettled.];
        W[ec]
        C[If White tries to push through, ...];
        B[fb]
        C[... Black is going to capture some stones.]
        )
    )
)

