(;
AB[op][pp][qp][nq][nr][qq][sq][sr][rr]
AW[nn][no][rn][po][qo][mp][mq][mr][ms][rp][rq][sp]
PL[W]
C[White plays.]
(;
W[ns]
C[Vulgar.];
B[pr]
C[Black can simply cover the vital point.  White has no good follow-up.]
)
    (;
    W[pr]
    C[Hopefully, everyone's first instinct is to play this vital point.];
    B[qr]
    C[Black has no choice but to connect.]
    (;
    W[ns]
    C[Probably many players' first instinct, but incorrect!];
    B[or];W[os]
    C[White can save the invading stone, but ...];
    B[pq]
    C[... Black can make a 2nd eye.]
    (;
    W[ps];B[np]
    )
        (;
        W[qs];B[rs];W[ps];B[np]
        )
    )
        (;
        W[np]
        C[Congratulations, if you saw this eye-stealing tesuji.  Black still cannot capture the invading stone, so Black dies.

For example ...]
        (;
        B[os];W[or]
        )
            (;
            B[or];W[os]
            )
            (;
            B[ps];W[os]
            (;
            B[or];W[qs];B[rs];W[ps]
            )
                (;
                B[ns];W[oq]
                )
            )
        )
    )
)

