(;AB[ab]AB[aa]AB[ba]AB[bc]AB[cb]AB[cc]AB[cd]AB[db]AB[dd]AB[ed]AB[gb]AB[gc]AB[fd]AW[ac]AW[ad]AW[bd]AW[be]AW[ce]AW[de]AW[ee]AW[fe]AW[gd]AW[hd]AW[ic]AW[hb]AW[ga]AW[da]AW[ea]AW[eb]C[I invented this problem 10 years ago in bed, in total darkness. Black to live.]AW[kc] (;B[ec] (;W[ca] (;B[fb];W[bb] (;B[fa] (;W[ba] (;B[ab]C[Capturing the 3 stones in the corner gained White just one liberty, but White needs two moves to connect!RIGHT]) (;B[ha];W[ab]C[Dead (but only since I added a stone at L17)]) (;B[aa];W[ab]) (;B[ib];W[hc] (;B[ha];W[ab]) (;B[ab];W[fc])) (;B[hc];W[fc])) (;W[ab] (;B[ba]C[Capturing the 3 stones in the corner gained White just one liberty, but White needs two moves to connect!RIGHT]) (;B[hc];W[fc]) (;B[ha];W[ba]) (;B[fc];W[ba]) (;B[ib];W[ba] (;B[ha];W[hc]) (;B[hc];W[fc]) (;B[jc];W[ha]) (;B[jb];W[ha]) (;B[ia];W[hc]) (;B[id];W[ha])))) (;B[ba];W[aa];B[fa]C[];W[ab];B[ba];W[ca]C[Alive, although Black wasted a point with the throw-in at B19.RIGHT]) (;B[ab];W[fa];B[ba];W[ha]C[Black is alive, but White should not be allowed to escape having played c19.]) (;B[aa];W[ab]LB[ba:A]C[Black can't play at A so White is connected.]) (;B[hc];W[fa]) (;B[ib];W[hc])) (;B[bb];W[fa]) (;B[fc];W[bb]) (;B[fa];W[fb] (;B[fc];W[bb]) (;B[bb];W[hc]C[Black cannot connect.])) (;B[hc];W[fb];B[fc];W[bb])) (;W[fa];B[ca]C[Life is easy after the best move from White.RIGHT])) (;B[ca];W[ec]C[Only one eye and no way to capture White.]) (;B[fb];W[ec] (;B[fa];W[fc]C[Whoops, neatly captured by White...]) (;B[fc];W[fa]) (;B[ca];W[hc]) (;B[dc];W[fa]) (;B[ha];W[ia]) (;B[hc];W[fc])) (;B[fa];W[fb] (;B[ec];W[ca] (;B[fc];W[bb]) (;B[bb];W[hc]C[Black cannot connect.])) (;B[ca];W[ec];B[fc];W[hc]) (;B[fc];W[ca] (;B[bb];W[hc]TR[ec]C[The marked move would put Black in atari.]) (;B[ec];W[bb])) (;B[ha];W[ca] (;B[bb];W[ia] (;B[ec];W[hc]) (;B[fc];W[hc])) (;B[fa];W[bb]C[Black can't get two eyes.]) (;B[fc];W[ia]) (;B[ec];W[ia])) (;B[ib];W[hc]LB[ca:A]LB[ec:B]C[A and B are now miai for White.])) (;B[dc];W[ca]) (;B[fc];W[ca] (;B[bb];W[fa]) (;B[fa];W[fb] (;B[bb];W[hc]TR[ec]C[The marked move would put Black in atari.]) (;B[ec])) (;B[ec];W[bb]) (;B[fb];W[fa]) (;B[hc];W[ib] (;B[ec];W[fa]) (;B[fa];W[fb] (;B[ec];W[bb]) (;B[bb]MA[ec]C[Black E17 would be self-atari.])) (;B[bb];W[fa]) (;B[fb];W[fa]))) (;B[hc];W[ib] (;B[ec];W[ca];B[fb];W[bb]) (;B[ca];W[ec] (;B[fb];W[fa]) (;B[fa];W[fb]) (;B[fc];W[fa]C[F19 isn't even necessary; it just shows Black is dead and reduces variations])) (;B[fb];W[ec]) (;B[fc];W[ec]) (;B[fa];W[fb] (;B[ec];W[ca];B[fc];W[bb]) (;B[fc];W[ca] (;B[ec];W[bb]) (;B[bb]MA[ec]C[Black E17 would be self-atari.])))) (;B[ha];W[ca] (;B[ec];W[bb]) (;B[bb];W[fa]) (;B[fb];W[bb]) (;B[fa];W[bb])))