(;
AB[cd][ed][ic][ie][ld][qd][qe][qf][oe][of][og][pk][pn][iq][ep][dq][cq]
AW[gc][ge][gg][lf][nf][ne][od][pd][qc][pb][pg][qq][oq][cp][bq][bo][dn]
C[Black plays.

Source:
    "In the Beginning", by Ikuro Ishigure
    Ishi Press]
(;
B[ig]
C[Black doesn't have time to run out with the top center group.];
W[dh]
LB[dc:A][fo:B]
C[White takes this enormous side point.  Even worse, White is threatening to wreck Black's corner with A.

But if Black defends the upper left, White can swell the left side territory with B.]
)
    (;
    B[ch]
    C[The best move.  Black does not have to worry about his top center group.]
    (;
    W[ig]
    C[If White blocks access to the center, ...];
    B[mc]
    LB[nd:A]
    C[... Black can easily defend his group, while threatening to cut at A.]
    )
        (;
        W[mc]
        C[If White takes away the base at the top, ...];
        B[ig]
        C[... Black can run out to the center.  White cannot neglect his 3 stone group to the left.]
        )
        (;
        W[pi]
        C[The actual game continued with this relatively straightforward sequence.

The result on the whole board is favorable to Black.];
        B[qi];W[qh];B[qj];W[oh];B[ng];W[mi];B[mh];W[ni];B[li];W[lj];B[lh];W[mk];B[ig]
        )
    )
    (;
    B[ci]
    LB[cg:A]
    C[This extension is a bit too far.  A White invasion at A could easily materialize.]
    )
    (;
    B[dh]
    LB[cj:A][cf:B]
    C[Playing a line higher also has problems.  White now has a good point at A, and the invasion at B would be a lingering possibility.]
    )
)

