(;AB[aq]AB[bp]AB[cp]AB[cq]AB[cr]AB[cs]AB[dr]AB[dq]AB[bo]AB[bn]AB[cn]AW[bm]AW[cm]AW[dn]AW[do]AW[co]AW[dp]AW[ep]AW[eq]AW[er]AW[es]AW[ds]AW[em]AW[bq]AW[br]AW[ar]C[Suppose this is the late endgame. Black to live the best way.]AW[bk]AP[goproblems] (;B[an];W[ap];B[bs]C[sekiRIGHT]) (;B[bs];W[ap]C[];B[an]C[sekiRIGHT]) (;B[as];W[ap] (;B[bs];W[aq];B[ao];W[aq]) (;B[an];W[bs])) (;B[ap];W[an]) (;B[ao];W[ap]C[Ko. Black must win the Ko twice to live, while white only needs to win it once to kill, so this isn't the best way to live.]))