(;
AB[an][bn][cn][dn][en][bo][eo][fp][cq][eq][dr][er][es]
AW[ao][co][do][ap][bp][dp][dq][br][cr][ds]
C[Black plays.

From a tsumego collection.  But is the "official" solution correct?]
(;
B[bq]
C[This "official" solution shows White dying.]
(;
W[aq]
(;
B[cs]
C[The pro only gives this flawed attacking sequence.]
(;
W[as]
C[The only defense given.];
B[ds]
C[Yes, White dies, but White has a better defense!]
)
    (;
    W[bs]
    C[Correct defense.];
    B[ar];W[cp]
    C[White lives!]
    )
)
    (;
    B[bs]
    C[Black cannot kill White, but Black does have this better attack that the pro omitted.];
    W[as]
    C[Black only has a ko!];
    B[cs]
    C[For example, ...];
    W[ds];B[cs];W[cp];B[ds];W[bs]
    )
)
    (;
    W[cp]
    C[Fails];
    B[bs]
    C[White doesn't even have a ko.];
    W[as];B[ar];W[aq];B[cs]
    )
)
    (;
    B[bs]
    C[Bad timing];
    W[bq];B[ar];W[cs]
    C[White is alive.]
    )
)

