(;GM[1]FF[4]CA[UTF-8] SZ[19]RU[Japanese]KM[0]TM[1800,0,30,5]PW[]PB[]AW[cq][dr][cp]AB[co][do][dq][eq]AE[er]AB[gq][cm]C[black to kill cleanly in this basic but tough pattern] (;B[br]CR[br] ;W[cr]CR[cr] (;B[ao]CR[ao] ;W[bs]CR[bs] (;B[ar]CR[ar]C[RIGHT black connects out and white's hosed]) (;B[aq]CR[aq] ;W[ar]CR[ar]C[oops, ko]) (;B[bq]CR[bq] ;W[bp]CR[bp] (;B[ap]CR[ap] ;W[bo]CR[bo] (;B[bn]CR[bn] ;W[ar]CR[ar] (;B[aq]CR[aq] ;W[an]CR[an]) (;B[an]CR[an] ;W[aq]CR[aq])) (;B[an]CR[an] ;W[bn]CR[bn] (;B[bm]CR[bm] ;W[ar]CR[ar]) (;B[aq]CR[aq] ;W[am]CR[am]))) (;B[bo]CR[bo] ;W[aq]CR[aq]))) (;B[bs]CR[bs] ;W[bo]CR[bo] (;B[bn]CR[bn] ;W[bq]CR[bq] (;B[ao]CR[ao] ;W[ap]CR[ap]C[ko]) (;B[ap]CR[ap] ;W[ao]CR[ao])) (;B[bq]CR[bq] ;W[bp]CR[bp] (;B[bn]CR[bn] ;W[ao]CR[ao] ;B[aq]CR[aq] ;W[cs]CR[cs] (;B[er]CR[er] ;W[ar]CR[ar]) (;B[es]CR[es] ;W[ar]CR[ar]) (;B[ar]CR[ar] ;W[er]CR[er] ;B[fr]CR[fr] ;W[es]CR[es])) (;B[er]CR[er] ;W[bn]CR[bn]))) (;B[cs]CR[cs] ;W[bo]CR[bo] (;B[bn]CR[bn] ;W[bq]CR[bq] ;B[ao]CR[ao] ;W[ap]CR[ap]C[ko]) (;B[bq]CR[bq] ;W[bp]CR[bp] ;B[bn]CR[bn] ;W[er]CR[er] ;B[fr]CR[fr] ;W[ao]CR[ao] ;B[aq]CR[aq] ;W[es]CR[es]C[alive])) (;B[bo]CR[bo] ;W[bs]CR[bs] (;B[aq]CR[aq] ;W[bq]CR[bq] (;B[ar]CR[ar] ;W[ap]CR[ap]) (;B[ap]CR[ap] ;W[ar]CR[ar])) (;B[bq]CR[bq] ;W[bp]CR[bp] ;B[ap]CR[ap] ;W[ar]CR[ar]) (;B[ar]CR[ar] ;W[bq]CR[bq])) (;B[ap]CR[ap] ;W[bo]CR[bo] (;B[bp]CR[bp] ;W[bq]CR[bq] (;B[bn]CR[bn] ;W[aq]CR[aq] ;B[ao]CR[ao] ;W[bs]CR[bs]) (;B[aq]CR[aq] ;W[ao]CR[ao] ;B[ar]CR[ar] ;W[bs]CR[bs]) (;B[ar]CR[ar] ;W[aq]CR[aq])) (;B[bq]CR[bq] ;W[bp]CR[bp])) (;B[er]CR[er] ;W[bs]CR[bs] (;B[ds]CR[ds] ;W[ar]CR[ar]) (;B[bp]CR[bp] ;W[bq]CR[bq] ;B[ar]CR[ar] ;W[ds]CR[ds] ;B[aq]CR[aq] ;W[bo]CR[bo])) (;B[ar]CR[ar] ;W[bq]CR[bq] (;B[bo]CR[bo] ;W[bs]CR[bs]) (;B[ao]CR[ao] ;W[ap]CR[ap] ;B[bo]CR[bo] ;W[bs]CR[bs]) (;B[er]CR[er] ;W[bo]CR[bo] ;B[bn]CR[bn] ;W[ap]CR[ap] ;B[an]CR[an] ;W[bs]CR[bs] (;B[ds]CR[ds] ;W[ao]CR[ao]) (;B[ao]CR[ao] ;W[ds]CR[ds]))) (;B[bq]CR[bq] ;W[bp]CR[bp])) (;B[er]CR[er] ;W[br]CR[br] (;B[ds]CR[ds] ;W[cs]CR[cs]C[ko]) (;B[bp]CR[bp] ;W[bq]CR[bq] ;B[bo]CR[bo] ;W[cs]CR[cs])) (;B[bp]CR[bp] ;W[bq]CR[bq] ;B[bo]CR[bo] ;W[br]CR[br]))