(;AB[sh]AB[rh]AB[qh]AB[ph]AB[oh]AB[ng]AB[mg]AB[lf]AB[lh]AB[kh]AB[jh]AB[ig]AB[hg]AB[gg]AB[fg]AB[eg]AW[jg]AW[jf]AW[ih]AW[hh]AW[gh]AW[fh]AW[eh]AW[ji]AW[ki]AW[li]AW[kj]AW[ij]AW[mh]AW[nh]AW[ni]AW[nj]AW[oj]AW[pj]AW[qj]AW[rj]AW[sj]AW[og]AW[pg]AW[pe]AB[qd]AB[pc]AB[jc]C[Black played B as a reaction on white A, what can white do?]AB[qe]LB[pe:a]LB[qe:b]AP[goproblems] (;W[lg];B[kg];W[kf];B[lg];W[le] (;B[me];W[nf];B[mf];W[md];B[ne];W[nd] (;B[oe];W[od];B[of];W[pf]C[RIGHT]) (;B[of];W[oe];B[pf];W[nf]C[RIGHT])) (;B[nf];W[ne];B[of];W[pf];B[me];W[oe];B[mf];W[md]C[RIGHT])) (;W[kg];B[lg]) (;W[qf];B[rf]C[CHOICE]))