(;
AB[qq][pp][po][qn][oq][or]
AW[pq][pr][op][np][mq][kq][qr]
C[Black plays.

Source:
    "Top Tesuji" poll from the "Weekly" go newspaper.];
B[rr]
C[Everyone saw this move, right?];
W[rq]
(;
B[qp]
C[The correct follow up.  Maybe not everyone saw this move?];
W[rs];B[sr]
C[Now Black sets up the classic "tombstone" formation.];
W[sq];B[ps];W[ss];B[rr];W[sr];B[os]
C[Black wins the liberty race by one move.]
(;
W[nq];B[qs];W[rr];B[rp]
)
    (;
    W[qs];B[rp]
    )
)
    (;
    B[qs]
    C[This, and the next, forcing move may look tempting, but is a mistake.];
    W[qp];B[ps];W[qq]
    C[Now Black doesn't have a follow up.]
    (;
    B[qo]
    C[For example ...];
    W[rs];B[ss];W[sq];B[sp];W[ro];B[rn];W[nr]
    )
        (;
        B[sq];W[sp];B[ss]
        C[Black only has an unfavorable multi-step ko.]
        )
    )
)

