(;
AB[cj][dk][dl][cm][bl][bk][al][fj][gj][gk][hk][hl][hm][gm][fm]
AW[an][bn][cn][dn][en][gn][fn][hn][im][il][ik][ij][hi][gi][fi][ei][di][ci][bi][bj][ak][fl]
C[White plays.

Source:  British Go Journal #80

Cook analysis:  Myron Souris]
(;
W[dm]
C[The BGJ starts with this incorrect move sequence.]
(;
B[bm]
C[And then, after only giving this inferior defense ...];
W[el];B[em];W[ek];B[ej];W[dj];B[ck];W[hj]
C[... Black dies!

Black only has one eye on the left, and Black cannot approach the three internal White stones.]
)
    (;
    B[dj]
    C[But Black can live by taking the vital point here.

Now Black has an eye on the left, AND can connect to the right half of the group.];
    W[ej]
    C[Trying to cut here fails, but other White moves also fail.];
    B[ek];W[em];B[el]
    C[Black doesn't have a liberty shortage, so Black has two eyes.]
    )
)
    (;
    W[dj]
    C[White takes the vital point.  Now Black has no defense.];
    B[ck]
    C[Black can make an eye, but ...];
    W[dm]
    C[... White now has several forcing moves.];
    B[bm];W[el];B[em];W[ek];B[ej];W[hj]
    C[Black cannot approach the 3 inside stones, and dies.]
    )
    (;
    W[ek]
    C[Note that White can also play the center forcing moves first.

For example, ...];
    B[ej];W[el];B[em];W[dj]
    C[Now White must take the vital point.];
    B[ck];W[dm];B[bm];W[hj]
    C[Black dies from the same liberty shortage as before.]
    )
    (;
    W[el]
    C[The other center forcing move also works.];
    B[em];W[ek]
    C[Again White transposes to the main killing line.]
    )
)

