(;AP[goproblems]AB[rs]AB[rr]AB[qq]AB[pp]AB[op]AB[np]AB[nq]AB[or]AW[nr]AW[mr]AW[mq]AW[mp]AW[no]AW[oo]AW[qo]AW[qn]AW[rp]AW[rq]AW[sr]C[White to kill.](;W[ps];B[os](;W[pr];B[pq](;W[ns]C[RIGHT])(;W[qp];B[qr])(;W[po];B[qr]))(;W[ns];B[pr])(;W[qr];B[pr])(;W[pq];B[pr]))(;W[pr];B[ps](;W[pq];B[qr])(;W[qr];B[pq]))(;W[qr];B[pr])(;W[pq];B[pr])(;W[qp];B[pr])(;W[os];B[ps](;W[pr];B[ns])(;W[ns];B[pr])))