(;AW[ga]AW[fb]AW[gb]AW[ec]AW[fc]AW[dd]AW[ed]AW[ce]AW[de]AW[bf]AW[cf]AW[ag]AW[bg]AB[da]AB[ea]AB[fa]AB[eb]AB[cc]AB[dc]AB[ad]AB[cd]AB[ae]AB[be]AB[af]C[White to Kill]PL[W]
(;W[bb];B[bc]
(;W[cb]
(;B[ac]C[CHOICE]
(;W[db]C[RIGHT])
(;W[ab];B[db]
(;W[ca]C[RIGHT];B[ba];W[bd]C[RIGHT])
(;W[ba]C[seki]))
(;W[ca];B[db];W[ab]C[RIGHT];B[ba];W[bd]C[RIGHT])
(;W[ba];B[db]C[Black gets at least a seki.])
(;W[aa];B[db]
(;W[ca]C[seki])
(;W[ab];B[ca]C[black lives])
(;W[ba];B[ca]C[black lives])))
(;B[db]C[CHOICE]
(;W[ab]
(;B[ac]C[CHOICE];W[ca];B[ba];W[bd]C[RIGHT])
(;B[ca]C[CHOICE];W[ac];B[ba];W[bd]C[RIGHT]))
(;W[ca];B[ab]C[Black gets two eyes])
(;W[ba];B[ab]C[White is dead])
(;W[ac];B[ab]C[White is dead])
(;W[aa];B[ac]C[Black gets at least a seki.]
(;W[ca]C[seki])
(;W[ab];B[ca]C[black lives])
(;W[ba];B[ca]C[black lives])))
(;B[ab]C[CHOICE]
(;W[ca];B[db]C[White is dead])
(;W[db]
(;B[ac]C[CHOICE]
(;W[ca]C[RIGHT])
(;W[ba];B[aa]
(;W[ca]C[RIGHT])
(;W[bd]C[RIGHT]))
(;W[aa];B[ba];W[ca]C[RIGHT]))
(;B[ca]C[CHOICE]
(;W[ba]C[RIGHT])
(;W[aa];B[ba]C[Not too smart there])))
(;W[ba];B[db]C[White is dead])
(;W[aa];B[ba]C[White is dead])))
(;W[ab];B[cb]
(;W[ac];B[bd]
(;W[ba]C[Seki, but you can do better])
(;W[aa];B[ba])
(;W[ca];B[ba]C[White is dead]))
(;W[ba];B[ac]C[White is dead])
(;W[aa];B[ac]C[White is dead])
(;W[ca];B[ba]C[Whie is dead]))
(;W[ba];B[ac]
(;W[ca];B[db]C[Black gets at least a seki])
(;W[cb];B[db]C[Black gets at leaast a seki.])
(;W[ab];B[cb]C[Black gets 2 eyes])
(;W[aa];B[cb]C[Black gets 2 eyes])
(;W[db];B[cb]
(;W[ca];B[db]C[Black lives.])
(;W[ab];B[ca]C[Black gets two eyes.])))
(;W[db];B[cb]
(;W[ab];B[ac]C[Black gets two eyes.])
(;W[ba];B[ca]C[Black gets two eyes.])
(;W[aa];B[ca];W[ac];B[bd]C[White dies.]))
(;W[ac];B[ab]C[White is dead])
(;W[ca];B[ba]
(;W[db];B[cb]
(;W[aa];B[ab]C[Black manages to squeeze out a ko.])
(;W[da];B[ab]))
(;W[cb];B[db]
(;W[ab]C[seki])
(;W[aa];B[ac]C[seki]))
(;W[aa];B[db]
(;W[ac];B[ab]C[Black is happy with ko.])
(;W[ab];B[ac]C[seki]))
(;W[ab];B[cb]))
(;W[aa];B[cb]
(;W[ca];B[ba]C[This is ko, but you can kill black without ko.])
(;W[ac];B[ab]C[This is ko, but you can kill black without ko.])
(;W[ba];B[ca]C[Black gets three eyes.])
(;W[ab];B[ac]C[Black gets three eyes.])))
(;W[cb];B[bb]C[Black gets the vital point. This follows the 'Play at the point of symmetry' proverb.])
(;W[aa];B[bb]C[Black gets the vital point. This follows the 'Play at the point of symmetry' proverb.])
(;W[db];B[cb]C[Black gets 2 eyes])
(;W[ca];B[bc]
(;W[bb];B[ba]
(;W[db];B[cb]
(;W[aa];B[ab]C[Black manages to squeeze out a ko.])
(;W[da];B[ab]))
(;W[cb];B[db]
(;W[ab]C[seki])
(;W[aa];B[ac]C[seki]))
(;W[aa];B[db]
(;W[ac];B[ab]C[Ko makes black happy.])
(;W[ab];B[ac]C[seki])
(;W[cb];B[ac]C[seki]))
(;W[ab];B[cb]))
(;W[db];B[bb]
(;W[ba];B[ab]C[Black lives])
(;W[ab];B[ba]C[Black lives]))
(;W[ab];B[bb]
(;W[db];B[ba])
(;W[ba];B[db])))
(;W[ba];B[bb]C[Black gets the vital point. This follows the 'Play at the point of symmetry' proverb.])
(;W[ab];B[bb]C[Black gets the vital point. This follows the 'Play at the point of symmetry' proverb.])
(;W[ac];B[cb]
(;W[bb];B[ab]
(;W[bd];B[bc]
(;W[aa];B[ba]C[Black squeezes out a ko.])
(;W[ad];B[ba]))
(;W[bc];B[bd]
(;W[aa];B[ca]C[seki])
(;W[ba]C[seki]))
(;W[ba];B[bc])
(;W[aa];B[bd]
(;W[ca];B[ba]C[Black is happy to get this ko.])
(;W[ba];B[ca]C[seki])))
(;W[bd];B[bb]C[Black gets two eyes.])
(;W[ba];B[bb]
(;W[ab];B[bd])
(;W[bd];B[ab])))
(;W[bd];B[bc]C[Black gets 2 eyes])
(;W[bc];B[bb]C[Black gets the vital point. This follows the 'Play at the point of symmetry' proverb.]))