(;C[Got the idea from prob 3144. Does the ladder work?]AB[pd]AB[dp]AB[eq]AW[co]AW[fq]AW[hp]AW[pc]AW[qd]AW[qe]LB[od:Yes]LB[nc:No]AP[goproblems];W[od];B[pe];W[pf];B[oe];W[ne]AB[of]AW[og]AB[nf]AW[mf]AB[ng]AW[nh]AB[mg]AW[lg]AB[mh]AW[mi]AB[lh]AW[kh]AB[li]AW[lj]AB[ki]AW[ji]AB[kj]AW[kk]AB[jj]AW[ij]AB[jk]AW[jl]AB[ik]AW[hk]AB[il]AW[im]AB[hl]AW[gl];B[hm];W[hn];B[gm];W[fm];B[gn];W[go];B[fn];W[en];B[fo];W[eo];B[fp];W[ep]C[RIGHT])