(;AB[db]AB[dc]AB[ed]AB[ee]AB[fc]AB[gc]AB[hc]AB[hb]AB[ha]AW[cb]AW[cc]AW[de]AW[if]AW[dd]AW[bd]AW[ef]AW[ff]AW[fd]AW[gd]AW[hd]AW[id]AW[ic]AW[ib]AW[kb]AB[fa]C[This came up in a 3-dan blitz game on KGS. White missed the killing blow. Can you do better?]AB[df]AB[cf]AP[goproblems] (;W[da];B[ea] (;W[gb];B[fb];W[ec]C[RIGHT]) (;W[eb];B[ec]) (;W[ec];B[eb];W[gb]C[RIGHT]) (;W[fb];B[gb])) (;W[eb];B[ec]C[White played like this in the game and ended up losing many of the surrounding stones.]) (;W[ec];B[eb]TR[da]TR[gb]) (;W[gb];B[da];W[eb];B[ec]))