(;AW[be]AW[cd]AW[ce]AW[dd]AW[ed]AW[fd]AW[fc]AW[fb]AW[fa]AB[eb]AB[ec]AB[dc]AB[cc]AB[bd]AB[bc]AB[bb]AW[ba]AW[cb]AB[ca]LB[df:Yes]LB[ff:No]C[Can white make a ko if white gets to play?FORCE]AW[bf]AP[goproblems]
(;W[ff]C[Navigate solution for why])
(;W[df];B[ef]C[Please show how]
(;W[da];B[ea]
(;W[ca];B[ad]C[Seki.])
(;W[ab];B[db];W[ca];B[aa]
(;W[ca];B[ba])
(;W[ba];B[ca]))
(;W[ad];B[db];W[ca];B[aa]
(;W[ca];B[ac];W[ba]C[Ko.RIGHT])
(;W[ac];B[ca])))
(;W[ab];B[db]
(;W[ea];B[ac])
(;W[ad];B[ac]))
(;W[ea];B[aa])
(;W[ad];B[aa])
(;W[db];B[da])
(;W[aa];B[ab])
(;W[ac];B[aa])))