Note that the solution MIGHT be a ko IF you cannot live/kill unconditionally.
Information about the problem source can be found
here.
(;AW[qb]AW[rb]AW[rc]AW[qd]AW[qe]AW[rg]AW[qh]AB[rh]AB[qg]AB[qi]AB[pf]AB[og]AB[pe]AB[pd]AB[pc]AB[qc]AB[pb]AP[goproblems]
(;B[re]C[];W[qf]
(;B[rf];W[pg];B[rd];W[qg]
(;B[ph]C[RIGHT])
(;B[sg]C[RIGHT]))
(;B[rd];W[rf]
(;B[sg];W[pg];B[sf]C[RIGHT])
(;B[sf];W[pg];B[sg]C[RIGHT])))
(;B[rf];W[re];B[se];W[sd];B[sf];W[sb]))