(;AB[bh]AW[ch]AW[dg]AB[cg]AB[cf]AB[ce]AB[ai]AB[ak]AW[al]AW[bm]AW[am]AB[bl]AB[cl]AW[bi]AW[eg]AW[cj]AB[dj]AW[bn]AW[co]AB[cm]AB[dn]AB[cn]AW[bp]AW[do]C[black foolishly played 2 in respond to whites 1. white to punish]LB[cj:1]LB[dj:2]AW[dp]AB[ck]AP[goproblems];W[bg]
(;B[ah];W[ag];B[aj]AB[ck];W[bk];B[bj];W[bk]C[YESRIGHT])
(;B[dh];W[ah];B[di];W[aj];B[bk]C[reference variation: white can get a ko, so D10 was a mistake.RIGHT]))