(;
AB[sm][rm][qm][qn][qo][pp][pq][pr][ps]
AW[sr][qr][qq][qp][ro][rn]
C[Black plays.

Source:
    A Chinese Classics problem, titled "An Ambush of Six Stones"];
B[rs]
C[The only move.]
(;
W[sp]
C[White goes all out to make eye-shape, but ...];
B[rq];W[rr];B[rp]
C[... now Black has this standard eye-reduction tesuji];
W[sq];B[rp]
(;
W[rq];B[sn]
C[White can only make one eye.]
)
    (;
    W[qs]
    C[No better.];
    B[so]
    )
)
    (;
    W[qs]
    C[Cutting off the stone looks good, but ...]
    (;
    B[rr];W[rq];B[sp]
    C[... this throw-in creates a liberty shortage for White.];
    W[rp];B[sn]
    C[White dies.]
    )
        (;
        B[rq]
        C[Mistake.];
        W[rp];B[rr];W[sq];B[sn];W[ss]
        C[White eliminates the liberty shortage problem to live.]
        )
    )
)

