(;
AB[np][pp][qp][rp][sp][mq][mr][oq][pr][ps]
AW[pq][qq][rq][nr][or][qr][rr]
C[Black plays.]
(;
B[nq]
C[Simply reducing White's liberties is good enough.]
(;
W[qs];B[sr]
C[White has only one eye.]
)
    (;
    W[sq];B[sr];W[ss];B[qs]
    C[White cannot approach from either side.]
    )
)
    (;
    B[sr]
    C[Also works.];
    W[sq];B[qs];W[ss];B[ns]
    C[White has no move.]
    )
)

