(;
AB[ar][br][hr][ir][aq][cq][dq][fq][gq][iq][ap][fp][pp][do][fo][dn][pn][am][cm][bl][cl][dl][el][fl]
AW[jr][bq][hq][jq][nq][bp][cp][gp][hp][ip][ao][co][go][bn][cn][en][fn][bm][dm][em][gm]
C[White plays.

Source:
     Tesuji Dictionary, by Segoe Kensaku & Go Seigen];
W[dp]C[OK, the first move is easy.];B[eo]
(;
W[eq];B[er]
(;
W[cr];B[dr];W[cs]
(;
B[ds]
C[Black seems to have defended all the bottom stones, but ...];
W[fr];B[ep];W[gr]
C[... White catches the stones in a liberty shortage.]
)
    (;
    B[ep];W[bs]
    C[White lives.]
    )
)
    (;
    W[fr]
    C[Bad timing.];
    B[ep];W[cr];B[cs]
    C[Now Black can dodge to here.];
    W[gr];B[eq]
    C[White dies.]
    )
)
    (;
    W[cr]
    C[As an exercise to the reader, can White also start here?]
    )
)

