(;AP[goproblems]AW[rs]AW[rr]AW[qq]AW[pq]AW[pr]AW[or]AW[os]AB[qs]AB[sp]AB[ro]AB[qo]AB[pp]AB[oq]AB[np]AB[nr]AB[ns]C[Kill white group](;B[sr](;W[sq]C[CHOICE](;B[rq]C[Correct !RIGHT])(;B[rp];W[rq])(;B[qp];W[rq])(;B[qr];W[rq])(;B[ps];W[rq]))(;W[rq]C[CHOICE](;B[sq]C[Correct !RIGHT])(;B[rp];W[sq])(;B[qp];W[sq])(;B[qr];W[sq])(;B[ps];W[sq])))(;B[rq];W[sr];B[sq];W[qr])(;B[sq];W[sr])(;B[rp];W[sr])(;B[qp];W[sr]))