(;SZ[19]AB[rb]AB[sb]AB[qa]AB[pc]AB[pd]AB[pe]AB[qc]AB[pf]AB[qg]AB[rg]AB[sg]AW[qb]AW[pb]AW[oc]AW[nc]AW[nb]AW[oa]AW[rc]AW[sc]AW[qd]AW[qe]AW[se]AW[oe]AW[ne]AW[og]AW[oh]AW[pi]AW[ri]AW[qj]C[Black first to live.]FF[4]GM[1]AP[Jago:Version 4.35]GN[goproblem1509]
(;B[rd];W[sd]
(;B[re];W[rf]
(;B[qf];W[ra]
(;B[sf];W[sa]
(;B[re]
(;W[rb]C[CHOICE];B[rd]C[RIGHT])
(;W[rd];B[rb]
(;W[rf];B[sb]C[RIGHT])
(;W[sb];B[rb]C[RIGHT])))
(;B[rb];W[sb];B[re]
(;W[pa]C[CHOICE];B[rd]C[RIGHT])
(;W[rd];B[rb]C[RIGHT])))
(;B[re];W[rd];B[sf];W[sa]))
(;B[sf];W[ra]
(;B[qf];W[sa]
(;B[re]
(;W[rb]C[CHOICE];B[rd]C[RIGHT])
(;W[rd];B[rb]
(;W[rf];B[sb]C[RIGHT])
(;W[sb])))
(;B[rb];W[sb];B[re]
(;W[pa]C[CHOICE];B[rd]C[RIGHT])
(;W[rd];B[rb]C[RIGHT])))
(;B[re];W[rd];B[qf];W[sa]))
(;B[re];W[rd]
(;B[qf];W[ra];B[sf];W[sa])
(;B[sf];W[ra];B[qf])))
(;B[qf];W[re])
(;B[rf];W[re])
(;B[sf];W[re]))
(;B[re];W[rd]
(;B[rf];W[ra])
(;B[qf];W[rf];B[sf];W[ra])
(;B[sf];W[rf];B[qf];W[ra]))
(;B[qf];W[re])
(;B[sf];W[re])
(;B[rf];W[re])
(;B[ra];W[pa]))