(;AW[ab]AW[bb]AB[ac]AB[bc]AB[bd]AB[cc]AB[cb]AB[db]AW[ca]AB[ea]AB[eb]AB[fb]AW[fa]AW[gb]AW[hb]AW[fc]AW[ec]AW[dd]AW[cd]AB[dc]AW[ed]AW[be]C[oops! b can die now!]AW[fe]AP[goproblems] (;W[ba] (;B[ga] (;W[aa]C[well done! dead shape, preventing black from taking d19 (which would result in a chance for b life, w being unable to play a19 suicide =)CHOICERIGHT]) (;W[ae];B[da]C[];W[ad];B[aa];W[ba]C[ko!]) (;W[ha];B[da]C[black got a living shape!])) (;B[da];W[ad]C[well done! =)RIGHT])) (;W[ga];B[ba]) (;W[aa];B[ba]) (;W[ad];B[ae]C[b is either out with b14 or alive with b19!]) (;W[ae];B[ba]))