(;
AB[kr][kp][mp][nq][nr][op][pp][qp][rp][ro][so][os][ps]
AW[ns][ms][mr][or][oq][pq][qq][rq][sq][sp]
C[White plays.

Can a pro make a mistake on a kyu level tsumego exercise?!]
(;
W[rs]
C[The solution gives this as the vital point.  But does this move really work?!]
(;
B[sr]
C[The solution only gives this attack line.];
W[rr]
C[And White easily make a 2nd eye on the left.]
)
    (;
    B[rr]
    C[But doesn't this play kill White?]
    (;
    W[sr];B[qr]
    C[And without being able to atari from the inside, White dies]
    )
        (;
        W[qr]
        C[Capturing a stone doesn't work either.];
        B[sr]
        C[White only has 1 real eye and 1 false eye.]
        )
        (;
        W[qs]
        C[Capturing the 2 stones doesn't help either.];
        B[sr]
        C[Again, Black calmly reduces White to 1 eye.]
        )
    )
)
    (;
    W[rr]
    C[Instead, isn't this the vital point and solution to the problem?];
    B[rs];W[ss]
    C[And White has a direct ko.]
    )
)

