White to find the best way to protect his one eyed group. Thanks to Spica and Obotchaman who spotted some mistakes.
(;TR[pa]C[Black has played the marked stone. White to play.]AW[oa]AW[jb]AW[ob]AW[ic]AW[kc]AW[lc]AW[nc]AW[oc]AW[jd]AW[md]AW[od]AW[me]AW[ne]AW[oe]AB[pa]AB[na]AB[kb]AB[lb]AB[mb]AB[qb]AB[mc]AB[pc]AB[rc]AB[ld]AB[pd]AB[le]AB[pe]AB[lf]AB[mf]AB[nf]AB[of]AB[pf]PL[W]
(;W[la];B[ka]
(;W[nb];B[pb]
(;W[ma];B[na]
(;W[ma]C[White is safe.RIGHT])
(;W[ja];B[nd]))
(;W[ja];B[nd]))
(;W[ja];B[pb]C[Seki.])
(;W[pb];B[qa]C[Sente seki for Black.]))
(;W[ka];B[la]
(;W[nb];B[ja]C[]
(;W[ia];B[pb]
(;W[ka];B[nd])
(;W[ma]C[Only ko.]))
(;W[ma]C[Approach move ko. White could have captured Black unconditionally.])
(;W[pb];B[nd]))
(;W[ja];B[pb]C[Seki.]))
(;W[nb];B[la]C[Only ko.]
(;W[ma]C[Approach move ko. White could have captured Black unconditionally.])
(;W[pb];B[nd])
(;W[ka];B[ja]C[]
(;W[ia];B[pb]
(;W[ka];B[nd])
(;W[ma]C[Only ko.]))
(;W[ma]C[Approach move ko. White could have captured Black unconditionally.])
(;W[pb];B[nd]))
(;W[ja];B[pb]
(;W[ka];B[nd])
(;W[ma]C[Ko])))
(;W[ma];B[la]
(;W[nb];B[pb]C[Only ko.])
(;W[ja];B[pb]C[Gote seki for white.])
(;W[pb];B[qa];W[ja];B[nb]))
(;W[nb];B[la]C[Only ko.]
(;W[ma]C[Approach move ko. White could have captured Black unconditionally.])
(;W[pb];B[nd])
(;W[ka])
(;W[ja];B[pb]
(;W[ka];B[nd])
(;W[ma]C[Ko])))
(;W[pb];B[qa]
(;W[ka];B[nb])
(;W[ma];B[nb])
(;W[la];B[nb])
(;W[nb];B[nd]))
(;W[ja];B[nb]))