(;
AB[ho][bp][bq][gp][gq][gr][gs][hq][ar][cr][cs]
AW[co][cp][cq][fo][fp][go][hp][ip][jp][dr][fr][hr][ir]
C[Black plays.

Source:
    "Tesuji", by James Davies
    Elementary Go Series, vol. 3]
(;
B[es]
C[A vital point, but bad timing.];
W[er]
C[For example, White can simply connect here.];
B[ds];W[fs];B[fq];W[ep]
C[White maintains the separation to capture Black's stones to the right.]
)
    (;
    B[er]
    C[Perfect move to take advantage of White's awkwardly placed stones.]
    (;
    W[eq];B[es]
    C[Now Black can take this point to connect all the lower stones.]
    )
        (;
        W[es]
        C[No better.];
        B[eq];W[dq];B[ds];W[fq];B[fs]
        )
    )
)

