(;AP[goproblems]AB[rq]AB[qr]AB[pq]AB[qp]AB[oq]AB[ro]AB[rn]AB[qm]AB[pm]AB[om]AB[nn]AB[mn]AB[lo]AB[lp]AB[lq]AB[lr]AB[ls]AW[os]AW[or]AW[ms]AW[mr]AW[mq]AW[mp]AW[mo]AW[nq]AW[no]AW[op]AW[pp]AW[pn]AW[qn]AW[qo]C[Kill white group](;B[oo];W[on](;B[po]C[Correct !RIGHT])(;B[pr];W[po])(;B[ps];W[po])(;B[nr];W[po])(;B[ns];W[po]))(;B[on];W[oo])(;B[pr];W[on])(;B[ps];W[on])(;B[po];W[oo])(;B[ns];W[on])(;B[nr];W[on])(;B[qs];W[on]))