(;SZ[19]AW[qb]AW[rb]AW[nc]AW[rc]AW[nd]AW[od]AW[pd]AW[qd]AW[rd]AW[sd]AW[re]AW[sf]AB[nb]AB[pb]AB[mc]AB[oc]AB[pc]AB[qc]AB[md]AB[me]AB[ne]AB[oe]AB[pe]AB[qe]AB[rf]AB[rg]GM[1]FF[4]CA[UTF-8]RU[Japanese]KM[0.00]TM[]PB[]PW[]AE[mb]AE[sb]
(;B[sb];W[qa]
(;B[sa];W[ob];B[oa];W[pa];B[ob];W[mb])
(;B[ob];W[sa];B[ra];W[sc]))
(;B[qa];W[ra];B[sb];W[ob];B[oa];W[pa]C[If black can win this ko, white is dead.RIGHT]))