(;AB[od]AB[rc]AB[pd]AB[nh]AB[pg]AB[ne]AB[oe]AB[of]AB[ng]AB[oh]AB[qd]AB[qe]AB[pf]AB[qg]AB[rg]AW[me]AW[lf]AW[nf]AW[mg]AW[mh]AW[md]AW[oi]AW[pi]AW[ph]AW[qj]AW[ri]AW[mi]AW[qc]AW[qb]AW[oc]AW[ob]AW[nd]AW[rf]AW[qf]AW[re]AW[rd]C[Black to play. How can Black live with his stones?]SZ[19]CA[utf-8]ST[2]RU[Japanese]GM[1]AP[CGoban:3]FF[4]PB[Musta]PW[Valkea]KM[0]MULTIGOGM[1]
(;B[sd];W[rb]
(;B[sb];W[sc];B[mf]C[CORRECT Alive in double-ko.RIGHT])
(;B[sc];W[sb];B[mf]C[Ko for life.RIGHT]))
(;B[sb];W[sd]
(;B[mf]C[Ko for life.RIGHT])
(;B[sf];W[rb];B[mf]C[Ko for life.RIGHT]))
(;B[rb];W[ra];B[sb];W[qa];B[sd];W[sa];B[mf]C[RIGHT]C[Ko for life.RIGHT])
(;B[mf];W[rb];B[nf]C[RIGHT]))