(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[13]KM[0.00]TM[] PW[White]PB[Black]AW[eb][hb][ec][hc][ic][jc][fd][gd][ge][gf]AB[db][gb][dc][gc][cd][ed][hd][id][ee][hf][if][fg][gg]C[Black to play to capture White's six stones. ] (;B[fa]CR[fa] ;W[ea]CR[ea] ;B[fc]LB[fa:1]CR[fc]C[RIGHT Black 1 is the vital point. Black can rescue its two stones and capture White's stones.]) (;B[ea]CR[ea] ;W[fa]CR[fa] (;B[fc]CR[fc] ;W[da]LB[ea:1][fa:2]CR[da]C[If Black 1, White occupies the vital point 2 and Black cannot save its stones.]) (;B[fb]CR[fb] ;W[fc]CR[fc] (;B[ga]CR[ga] ;W[ha]TR[ga][fb][gb][gc]CR[ha]C[Black loses the four marked stones.]) (;B[da]CR[da] ;W[ga]CR[ga])) (;B[ga]CR[ga] ;W[fc]CR[fc] (;B[fb]CR[fb] ;W[ha]TR[ga][fb][gb][gc]CR[ha]C[Black loses the four marked stones.]) (;B[ha]CR[ha] ;W[ia]TR[ga][ha][gb][gc]CR[ia]C[Black loses the four marked stones.] ;B[fb]CR[fb] ;W[fa]CR[fa])) (;B[da]CR[da] ;W[fb]CR[fb])) (;B[fb]CR[fb] ;W[ea]CR[ea]) (;B[fc]CR[fc] ;W[fa]CR[fa] (;B[fb]CR[fb] ;W[ga]CR[ga]) (;B[da]CR[da] ;W[ga]CR[ga])))