I was ahead until I overlooked black's sequence. Beat me down like my opponent did!
(;AP[goproblems]AB[ba]AB[bb]AB[bc]AB[cc]AB[cd]AB[dd]AB[de]AB[df]AB[fe]AB[ff]AB[gf]AB[gg]AB[ig]AB[hh]AB[if]AB[ie]AB[id]AB[jd]AB[jc]AB[ib]AB[hc]AB[ha]AW[cb]AW[db]AW[dc]AW[fb]AW[gb]AW[hb]AW[gc]AW[gd]AW[fd]AW[ge]AW[he]AW[hf]AW[hg]AB[fh]C[Black to kill white's group.](;B[ec];W[ed](;B[eb];W[ea](;B[ca];W[fc];B[ga]C[RIGHT])(;B[ga];W[ca];B[da]C[RIGHT]))(;B[ga](;W[eb];B[ca]C[RIGHT];W[fa];B[da]C[RIGHT])(;W[fa](;B[ca];W[da];B[eb]C[RIGHT])(;B[eb](;W[ea];B[ca]C[RIGHT])(;W[ca];B[da]C[RIGHT]))))(;B[ca];W[eb](;B[da]C[RIGHT])(;B[ga];W[fa];B[da]C[RIGHT]))(;B[da];W[eb];B[ca]C[RIGHT]))(;B[ed];W[ec])(;B[ga];W[ec](;B[ea];W[fa])(;B[ca](;W[da])(;W[fa])(;W[ea])))(;B[ca];W[ec](;B[da];W[ea])(;B[ga];W[fa]))(;B[ea](;W[eb];B[ed];W[ec])(;W[ed](;B[eb];W[ec])(;B[ec];W[eb])))(;B[eb];W[ec])(;B[da];W[ec](;B[ca];W[ea])(;B[ea];W[ca](;B[ga];W[fa])(;B[fa];W[ga]))(;B[ga];W[ca](;B[fa];W[ea])(;B[ea];W[fa]))))