(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[0.00]TM[] AW[ab][hb][bc][ec][gc][hc][bd][cd][ed][de]AB[bb][eb][fb][gb][cc][dc]C[Black to live (be careful not to get a ko).] (;B[da]CR[da] (;W[cb]C[CHOICE] ;B[ba]LB[da:1]CR[ba]C[RIGHTBlack 1 is the vital point to get two eyes.]) (;W[ba]C[CHOICE] ;B[cb]LB[da:1]CR[cb]C[RIGHTBlack 1 is the vital point to get two eyes.])) (;B[ca]CR[ca] ;W[ba]LB[ca:1]CR[ba]C[If Black 1, then White 2 results in a Ko.]) (;B[ba]CR[ba] ;W[da]CR[da] (;B[db]CR[db] ;W[ca]CR[ca] (;B[ea]CR[ea] ;W[ga]CR[ga]) (;B[fa]CR[fa] ;W[ha]CR[ha]) (;B[ga]CR[ga] ;W[ea]CR[ea])) (;B[ea]CR[ea] ;W[ga]CR[ga] ;B[db]CR[db] ;W[ca]CR[ca])) (;B[cb]CR[cb] ;W[da]CR[da]))