(;AB[pb]AB[ob]AB[oe]AB[og]AB[pf]AB[qf]AB[rf]AB[re]AW[qe]AW[pe]AW[pd]AW[pc]AW[qc]AW[qb]AW[rd]AW[se]AB[rc]AB[sc]C[White to play and live]AB[nc]AB[nd]AP[goproblems]
(;W[rb];B[sf]
(;W[sb];B[sd]
(;W[se]C[RIGHT])
(;W[qa];B[se]))
(;W[sd];B[qd];W[rd];B[sd];W[sb];B[se])
(;W[qd];B[sd])
(;W[qa];B[sd]))
(;W[sd];B[sf]
(;W[qd];B[qa]
(;W[ra];B[sb])
(;W[rb];B[ra])
(;W[sb];B[ra]))
(;W[rb];B[qd];W[rd];B[sd];W[sb];B[se])
(;W[sb];B[qd]))
(;W[sb];B[rb]
(;W[ra];B[sa]
(;W[sd];B[qa])
(;W[qa];B[sf]
(;W[sb]C[only ko])
(;W[qd];B[sd])
(;W[sd];B[qd]))
(;W[sb]C[Please check your rulebook under the word 'ko'.]))
(;W[sd];B[sa];W[qa];B[sf]
(;W[qd];B[sb];W[ra];B[sb])
(;W[ra];B[qd]))
(;W[qa];B[sa]
(;W[ra];B[sf];W[sb]C[only ko])
(;W[sd];B[sf]
(;W[qd];B[sb];W[ra];B[sb])
(;W[ra];B[qd]))))
(;W[ra];B[sd]
(;W[sb];B[sf])
(;W[rb];B[sf])
(;W[qd];B[sf]))
(;W[qa];B[sd]C[R16 is not an eye, and you can only get one eye in the corner.])
(;W[sf];B[sg]
(;W[sd];B[qd])
(;W[qd];B[sd])
(;W[rb];B[sd])))