Problem from a book. This seems simple but do not be fooled! I performed a pattern search and did not find any identical results, so please excuse me if this is a duplicate.
(;AB[ns]AB[nr]AB[nq]AB[np]AB[op]AB[pp]AB[qp]AB[ro]AW[oq]AW[pq]AW[qq]AW[rq]AW[sq]AW[sr]AB[qr]AB[rr]C[White to live.]AP[goproblems]
(;W[rs];B[qs]
(;W[pr];B[ss];W[ps]C[RIGHT])
(;W[ps];B[ss];W[pr]C[RIGHT])
(;W[ss];B[os])
(;W[or]
(;B[os]C[NOTTHIS];W[ps];B[ss];W[pr]C[RIGHT])
(;B[ss]
(;W[os];B[rs]C[Seki, not the best.])
(;W[ps];B[rs]C[White is dead.])
(;W[pr];B[rs]C[White is dead.])))
(;W[os];B[ss]
(;W[or];B[rs]C[Seki. Not the best.])
(;W[ps];B[rs])
(;W[pr];B[rs])))
(;W[pr];B[rs]C[White is dead.])
(;W[ps];B[rs]
(;W[or];B[qs])
(;W[os];B[qs]))
(;W[qs];B[rs]
(;W[pr];B[os];W[ss];B[rr])
(;W[ps];B[pr];W[or];B[os])
(;W[os];B[or]
(;W[pr];B[ps];W[ss];B[os];W[qs];B[rr])
(;W[ps];B[pr])))
(;W[or];B[os]
(;W[ps];B[rs])
(;W[pr];B[ps])
(;W[rs];B[ps])
(;W[qs];B[rs]))
(;W[os];B[or];W[pr];B[rs]
(;W[ss];B[qs])
(;W[qs];B[ps];W[ss];B[os];W[qs];B[rr])))