(;SZ[13]AW[eb]AW[bc]AW[cc]AW[ec]AW[bd]AB[fb]AB[fc]AB[cd]AB[dd]AB[ed]AB[be]AB[cf]C[Black plays, White dies.]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.00]TM[]PW[White]PB[Black] (;B[ea] (;W[da] (;B[dc];W[db] (;B[cb]LB[ea:1]C[ The hane of black 1 is the vital point.CHOICERIGHT]) (;B[ba]C[RIGHT]) (;B[fa];W[ba]C[White lives]) (;B[bb];W[ab] (;B[cb];W[fa] (;B[ba]C[ White is in damezumariRIGHT]) (;B[ad];W[ba]) (;B[ga];W[ba])) (;B[ba];W[ad] (;B[cb]C[RIGHT]) (;B[ae];W[cb]) (;B[fa];W[cb]C[seki])) (;B[ad];W[ba])) (;B[ca];W[cb] (;B[ba];W[ad] (;B[ab]C[RIGHT]) (;B[bb];W[ab]) (;B[ae];W[ab])) (;B[ad];W[ba])) (;B[ab];W[bb] (;B[ba];W[fa] (;B[ca];W[cb] (;B[ad]C[RIGHT];W[aa];B[ba];W[ac];B[aa]C[RIGHT]) (;B[ae];W[ac]) (;B[ac];W[ad]) (;B[aa];W[ac];B[ba];W[aa];B[ab];W[ca]) (;B[ga];W[ac])) (;B[aa];W[ca]) (;B[ad];W[ca];B[ac]C[RIGHT];W[aa]C[ko]) (;B[ac];W[ad] (;B[ca];W[cb]) (;B[aa];W[ca]) (;B[ae];W[aa];B[ab];W[ca]))) (;B[ca];W[cb] (;B[ba] (;W[fa] (;B[ad];W[aa];B[ba];W[ac];B[aa]C[RIGHT]) (;B[ac];W[ad]) (;B[aa];W[ac];B[ba];W[aa];B[ab];W[ca])) (;W[ad];B[fa];W[aa];B[ba])) (;B[ad];W[aa];B[ba];W[aa];B[ba]C[RIGHT]) (;B[ac];W[ad])) (;B[ad];W[ac] (;B[ba];W[aa]C[ko]) (;B[ca];W[fa];B[ba];W[aa]C[ko]))) (;B[ad];W[ba] (;B[cb];W[ca] (;B[ab];W[bb];B[ac]C[RIGHT]) (;B[ac];W[bb];B[ab]C[RIGHT]) (;B[bb];W[ab])) (;B[ab];W[ac] (;B[bb];W[ae];B[cb]C[RIGHT]) (;B[cb];W[bb];B[ca]C[RIGHT]) (;B[ca];W[fa] (;B[cb];W[bb]) (;B[bb];W[cb])) (;B[ae];W[bb])) (;B[ac];W[ab];B[cb];W[ae];B[ca];W[ad];B[bb]C[RIGHT]) (;B[bb];W[ab])) (;B[ac];W[bb] (;B[ad];W[ca];B[ab];W[aa]C[ko]) (;B[ba];W[fa] (;B[ad];W[ca];B[ab];W[aa]C[ko]) (;B[ab];W[ad] (;B[ae];W[aa];B[ab];W[gb]C[When white goes out like this, there's no telling what will happen next.]) (;B[ca];W[cb])) (;B[aa];W[ad])) (;B[ab];W[ad];B[ba];W[fa] (;B[ga];W[ca]) (;B[gb];W[ca]) (;B[hb];W[ca]) (;B[ca];W[cb]) (;B[aa];W[ca])) (;B[ca];W[fa] (;B[ad];W[ab] (;B[ba];W[gb]C[If white can come out like this, anything might happen.]) (;B[ae];W[ba])) (;B[ab];W[ad];B[ba];W[cb]) (;B[gb];W[ad]) (;B[ga];W[ad]) (;B[hb];W[ad])))) (;B[db];W[dc] (;B[ca];W[cb] (;B[da];W[ba];B[fa];W[ab]) (;B[ba];W[da]C[ko]) (;B[fa];W[ba];B[da];W[ab]) (;B[bb];W[da]C[ko])) (;B[cb];W[bb];B[ca];W[ba]C[White lives.]) (;B[fa];W[cb])) (;B[ca];W[ba] (;B[db];W[cb] (;B[ab];W[dc]) (;B[dc];W[ab]) (;B[da];W[ab])) (;B[cb];W[bb] (;B[db];W[dc]) (;B[dc];W[db])) (;B[dc];W[cb] (;B[db];W[ab]) (;B[ab];W[db])) (;B[bb];W[cb] (;B[dc];W[ab]) (;B[ab];W[dc])) (;B[ab];W[cb];B[dc];W[db])) (;B[cb];W[dc] (;B[db];W[bb];B[ca];W[ba]) (;B[ca];W[bb] (;B[db];W[ba]) (;B[ba];W[db] (;B[ad];W[aa] (;B[ac];W[ca]) (;B[ca];W[ac])) (;B[ab];W[aa] (;B[ba];W[ca] (;B[ad];W[aa]C[ko]) (;B[aa];W[ac])) (;B[ad];W[ac])) (;B[aa];W[ab])) (;B[ad];W[ba])) (;B[ad];W[bb] (;B[ab];W[ac] (;B[ba];W[fa] (;B[ca];W[ae]) (;B[aa];W[ca])) (;B[ca];W[ba])) (;B[ac];W[ab] (;B[ba];W[fa] (;B[ca]C[seki, so white lives]) (;B[ga];W[ca]) (;B[gb];W[ca]) (;B[hb];W[ca])) (;B[ae];W[ca]) (;B[ca];W[ba])) (;B[ca];W[ba]) (;B[ba];W[fa] (;B[ac];W[ab];B[ca]C[seki]) (;B[ab];W[ac] (;B[ca];W[ae]) (;B[aa];W[ca])) (;B[ca];W[ac]))) (;B[bb];W[ab] (;B[ad];W[ba]) (;B[ca];W[fa] (;B[ad];W[ba]C[ko]) (;B[ba];W[ad])) (;B[db];W[ba])) (;B[ac];W[ad] (;B[ca];W[bb] (;B[db];W[ba]) (;B[ba];W[db])) (;B[bb];W[ab]))) (;B[ba];W[dc] (;B[ca];W[cb]C[ko]) (;B[fa];W[cb] (;B[ca];W[bb]C[ko]) (;B[ab];W[ca]C[seki is the best black can get now.])) (;B[ad];W[cb];B[ca];W[fa])) (;B[bb];W[cb] (;B[dc];W[ab] (;B[ba];W[ad]) (;B[ad];W[ba]) (;B[db];W[ba])) (;B[ba];W[dc];B[ca];W[fa]) (;B[ab];W[dc];B[ba];W[ac])) (;B[ad];W[dc] (;B[ca];W[ba] (;B[db];W[cb];B[da];W[fa]) (;B[cb];W[bb])) (;B[cb];W[bb] (;B[ca];W[ba]) (;B[ac];W[ab] (;B[ca];W[ba]) (;B[ba];W[fa];B[ca]C[seki]))) (;B[ac];W[ab] (;B[ae];W[ba]) (;B[ca];W[cb] (;B[ba];W[bb]C[ko]) (;B[db]C[ko])) (;B[bb];W[ae];B[ca];W[cb])) (;B[bb];W[cb];B[ac];W[ab] (;B[aa];W[ba]C[ko]) (;B[ba];W[ae])))) (;W[db] (;B[ad]LB[ea:1]LB[db:2]C[ Black's Hane gives White no space enough to get two eyes.CHOICERIGHT]) (;B[ba];W[bb] (;B[da];W[ca]C[ko]) (;B[ca];W[da] (;B[ad];W[ac];B[aa]C[ Bent four in the cornerRIGHT]) (;B[dc];W[fa] (;B[ad];W[ac] (;B[aa];W[gb]C[If white runs out like this, there's no telling what will happen.]) (;B[ab];W[aa]C[ko])) (;B[aa];W[ad]C[White lives.]) (;B[ab];W[ac];B[aa];W[cb];B[ba];W[aa];B[ab];W[ca])) (;B[aa];W[ad]) (;B[ab];W[ac] (;B[dc];W[fa];B[aa];W[cb];B[ba];W[aa];B[ab];W[ca]) (;B[aa];W[cb];B[ba];W[aa];B[ab];W[ca]) (;B[fa];W[cb]))) (;B[ab];W[ca]) (;B[ad];W[ca]) (;B[dc];W[ca];B[fa];W[aa])) (;B[da];W[ca] (;B[bb];W[ab] (;B[ba];W[fa] (;B[ea];W[ad]) (;B[ad];W[ea])) (;B[fa];W[ba])) (;B[fa];W[bb];B[dc];W[aa]) (;B[dc];W[fa])) (;B[bb];W[ab];B[ba];W[ad];B[da]C[RIGHT]) (;B[ca];W[ba] (;B[bb];W[ab];B[aa]C[ko]) (;B[cb];W[bb]) (;B[ad];W[ab]) (;B[ab];W[da])))) (;B[db];W[dc] (;B[ea];W[ca] (;B[da];W[cb];B[fa];W[ab]) (;B[cb];W[bb]) (;B[fa];W[da]) (;B[ad];W[da])) (;B[cb];W[bb];B[ea];W[da];B[ca];W[ba])) (;B[bb];W[cb] (;B[dc];W[ab];B[ba];W[ad] (;B[db];W[ca]) (;B[ca];W[da])) (;B[ea];W[ab]) (;B[ab];W[dc]) (;B[ba];W[ab] (;B[dc];W[ad] (;B[db];W[ca]) (;B[ca];W[da])) (;B[ad];W[dc]))) (;B[ba];W[dc];B[ea];W[da] (;B[ca];W[fa] (;B[cb];W[ad] (;B[ab];W[bb]) (;B[bb];W[ab])) (;B[ad];W[cb])) (;B[ab];W[cb]) (;B[bb];W[cb];B[ca];W[fa]) (;B[cb];W[bb];B[ca];W[fa] (;B[ad];W[ac]) (;B[ab];W[ac]))) (;B[ca];W[ba] (;B[bb];W[ab] (;B[aa]C[ko]) (;B[cb];W[db];B[aa]C[ko at best])) (;B[ea];W[cb] (;B[da];W[ab]) (;B[ab];W[da];B[dc];W[db])) (;B[cb];W[db] (;B[bb];W[ab];B[aa]C[ko]) (;B[ea];W[bb]) (;B[dc];W[bb]))) (;B[dc];W[db] (;B[cb];W[bb]) (;B[bb];W[ab] (;B[ba];W[ca] (;B[ad];W[ea]) (;B[ea];W[ad])) (;B[cb];W[ba])) (;B[ea];W[ca] (;B[ad];W[bb]) (;B[ba];W[bb];B[fa];W[aa]) (;B[bb];W[ab];B[ba];W[ad])) (;B[ad];W[bb];B[ca];W[ba])))