(;AB[cp]AB[co]AW[eo]AW[ep]AW[go]AB[do]AW[dp]AB[en]AB[em]AW[dn]AW[cl]MA[dn]C[how to catch the marked stone?FORCE]AP[goproblems]
(;B[cm]C[this is best. black has an eye here for sureRIGHT])
(;B[dm];W[cm];B[cn]C[not so good, no eye for black])
(;B[cn];W[dm]C[black is cut])
(;B[dl];W[cm]C[black is cut])
(;B[bm];W[cm])
(;B[bn];W[cm])
(;B[el];W[cm])
(;B[cq];W[cm]))