(;SZ[19]AW[bb]AB[cb]AW[db]AW[eb]AW[cc]AB[dc]AB[ec]AB[fc]AB[fb]AB[gb]AB[ea]AW[hb]AW[hc]AW[gc]AW[fd]AW[ee]AW[de]AW[ce]AW[be]AB[dd]GM[1]VW[] (;B[ca];W[ga] (;B[bc];W[ac];B[cd];W[bd] (;B[ab];W[aa];B[ba];W[cc]C[ A ko.RIGHT]) (;B[ba];W[ab])) (;B[cd];W[bc];B[bd];W[ad];B[ac];W[ab]) (;B[bd];W[cd];B[bc];W[ac])) (;B[da];W[ga] (;B[bc];W[ac] (;B[cd];W[bd];B[ab];W[aa];B[ba];W[ca]C[This is not the way. A fter black plays elsew here and white respond s...];B[ba];W[cc]C[Black cannot win this.];B[ab];W[bc]) (;B[bd];W[cd])) (;B[ba];W[bc]) (;B[bd];W[cd];B[bc];W[ac])) (;B[cd];W[bc];B[bd];W[ad] (;B[da];W[ga];B[ba];W[ac]) (;B[ca];W[ga] (;B[ba];W[ac]) (;B[ac];W[ab]))) (;B[bc];W[ca];B[cd];W[bd];B[cb];W[ac] (;B[cc];W[ga] (;B[ba];W[aa];B[da];W[ab]) (;B[aa];W[ab]) (;B[ab];W[aa];B[da];W[ab])) (;B[ga];W[cc]) (;B[da];W[ga];B[ab];W[aa];B[ba];W[cc]C[After black makes a ko threat and white resp onds...];B[bc];W[ca];B[ba];W[cc]C[Black cannot win this.];B[ab];W[bc])))