(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[0.00] PW[Weiß]PB[Schwarz]AW[aq][bq][dr][es]AB[bp][cp][dp][ep][fq][fr][cs][fs]PL[W] (;W[bs]CR[bs] (;B[br]CR[br] ;W[ar]CR[ar] ;B[as]LB[cr:A]CR[as]C[Black A didn't work, so Black has to accept this ko. RIGHT]) (;B[cr]CR[cr] ;W[cq]CR[cq] (;B[er]CR[er] ;W[br]CR[br] ;B[ds]CR[ds] ;W[es]CR[es] ;B[ds]CR[ds] ;W[cs]CR[cs] ;B[dq]CR[dq] ;W[es]CR[es]C[This is a better ko than in the solution]) (;B[br]CR[br] ;W[ar]CR[ar] ;B[as]CR[as] ;W[ds]CR[ds]C[White lives, but Black made a mistake]))) (;W[br]CR[br] (;B[er]CR[er]C[White is dead]) (;B[cr]CR[cr] ;W[cq]CR[cq] ;B[er]CR[er] ;W[bs]CR[bs]C[Black tricked himself here] ;B[ds]CR[ds] ;W[es]CR[es] ;B[ds]CR[ds] ;W[cs]CR[cs] ;B[dq]CR[dq] ;W[es]CR[es]C[This is a better ho than the solution])) (;W[cr]CR[cr] ;B[br]CR[br]C[White is dead]) (;W[er]CR[er] ;B[cr]CR[cr] ;W[cq]CR[cq] ;B[dq]CR[dq]C[White is dead]) (;W[cq]CR[cq] ;B[er]CR[er] ;W[ds]CR[ds] ;B[dq]CR[dq] ;W[cr]CR[cr] ;B[bs]CR[bs]C[White is dead]))