(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[0.00]TM[] PW[Igo for windows]PB[Human] AW[dl][am][an][ao][bo][bp][dp][bq][cq][dr][fr][cs][ds][es][fs][gs] AB[al][cl][bm][cm][dm][gm][bn][cn][dn][co][eo][cp][dq][eq][fq][hq][er][gr][hs]C[Black to kill.] (;B[ar]CR[ar] (;W[aq]CR[aq]C[CHOICE] ;B[bs]CR[bs] ;W[cr]CR[cr]C[It's the famous two stone seki!]) (;W[br]CR[br]C[CHOICE] ;B[aq]CR[aq] ;W[bs]CR[bs]C[WRONG White puts a stop to your evil plans!])) (;B[bs]CR[bs] ;W[cr]CR[cr] ;B[ar]CR[ar] ;W[br]CR[br] ;B[aq]CR[aq] ;W[as]CR[as]C[WRONG Ko in white's favor. White stands to lose a lot, so a suitable threat is unlikely]) (;B[br]CR[br] (;W[ar]CR[ar]C[CHOICE] (;B[bs]CR[bs] ;W[cr]CR[cr] ;B[aq]CR[aq] ;W[as]CR[as]C[The pain of loss.]) (;B[aq]CR[aq] (;W[bs]CR[bs]C[CHOICE] ;B[as]CR[as]C[RIGHT Ko in favor of black. Given the size of the prize, it's unlikely that white has a viable threat.]) (;W[ap]CR[ap]C[CHOICE] ;B[bs]CR[bs] ;W[cr]CR[cr] ;B[aq]CR[aq]C[RIGHT White = 0wz0rd]))) (;W[cr]CR[cr] ;B[aq]CR[aq] (;W[bs]CR[bs] ;B[ar]CR[ar]C[Dead as a proverbial doornail.]) (;W[ar]CR[ar] ;B[as]CR[as]C[Butt-whooped.]) (;W[as]CR[as] ;B[ar]CR[ar]C[Would be seki, but b1 works for black.])) (;W[aq]CR[aq] ;B[cr]CR[cr]C[Divided and conquered.]) (;W[bs]CR[bs]C[CHOICE] (;B[ar]CR[ar] ;W[aq]CR[aq]C[Whoopsie.]) (;B[aq]CR[aq] ;W[ar]CR[ar] ;B[as]CR[as]C[RIGHT Ko in favor of black. Given the size of the prize, it's unlikely that white has a viable threat.]))))