(;AB[aq]AB[bq]AB[br]AB[bs]AB[cq]AB[dq]AB[dr]AW[fr]AB[fs]AB[gr]AB[hr]AW[fq]AW[gq]AW[hq]AW[mr]MA[gr]MA[hr]C[Capture the marked stones.]AW[jr]AW[iq]AW[is]AB[er]AP[goproblems] (;W[hs];B[gs]C[Now black can connect at E1 and save them all. :(]) (;W[ir];B[gs]C[Now black can connect at E1 and save them all. :(]) (;W[gs];B[hs] (;W[ir] (;B[es];W[gs]C[They can't get away that way. :) Good job.RIGHT]) (;B[gs];W[es]C[Black can't connect out after you sacrificed the stone to remove a liberty. :)RIGHT])) (;W[es];B[ds];W[ir];B[es];W[gs]C[Correct result in catching, but why waste the stone at E1?RIGHT])) (;W[es];B[gs]C[Now black saves it all! :( E1 is not right.]))