(;AB[cq]AB[dp]AB[do]AB[co]AW[cp]AW[dq]AW[eq]AW[ep]AW[eo]AW[en]AW[cm]AW[dm]TR[cp]C[what's the best way to catch marked stone?FORCE]AP[goproblems] (;B[bp]C[simple is best. this leaves the least aji and gives white the fewest followup moves.RIGHT]) (;B[cr];W[bo] (;B[bp];W[bn]C[now black must make another move to live: good for white]) (;B[bn];W[bp];B[cn];W[bm])) (;B[bo];W[cr]) (;B[bq];W[bn];B[bo];W[cr];B[br];W[ds]C[black needs another move: good for white]) (;B[br];W[bo] (;B[bp];W[bn]C[black must live in gote while white gets good shape...]) (;B[bn];W[bp];B[cn];W[bm])) (;B[bn];W[cr]C[white encroaches into the corner]) (;B[dr];W[bp]C[black crumbles]))