This problem is for my sister, who is in New Zeland now (it is 18 December today).
I am looking forward to see her again in April and I have created a problem for her. Hope she will find it. And solve it (she is 4kyu so I think she has a fair chance :-) )
Find one little tesuji and enjoy :o)
(;AB[sb]AB[rc]AB[qb]AB[pb]AW[sd]AW[rd]AW[qc]AW[pc]AW[nc]AB[qa]AW[ph]AW[pf]AB[sc]AW[ob]AB[oc]AW[nb]AW[oe]AW[pg]AW[rh]C[White to play and kill the corner.]AW[nd]AW[qh]AP[goproblems]
(;W[ra];B[qd]
(;W[pd];B[qe]
(;W[oa]C[];B[re]
(;W[pa]C[Nice, you win! :-)RIGHT])
(;W[sf];B[se]C[You missed your chance :-(]))
(;W[rf];B[re]C[Black lives])
(;W[sf];B[se];W[re];B[rf]C[Black lives]))
(;W[re];B[pd]C[Black lives])
(;W[qe];B[pd]C[Black lives])
(;W[od];B[qe];W[oa];B[re];W[pa]C[Nice, you win! :-)RIGHT]))
(;W[qd];B[ra]C[The second best result, but black lives.]))