(;GM[1]FF[3]SZ[19]
AW[ob][mc][oc][qc][pd][qd]AB[pb][pc][od][oe][pe][qe]PL[B]C[Black to play and get a ko.];B[qb];W[rb];B[rc]
;W[rd];B[sb]
(;W[sc];B[ra])
(;W[ra];B[sd]))