(;AB[qr]AB[qq]AB[qp]AB[pp]AW[pq]AW[pr]AW[ps]AB[oq]AB[nq]AW[mq]AB[kq]AW[np]AW[op]AW[po]AW[qo]AW[ro]AW[nn]AB[nr]LB[nr:1]TR[pp]TR[qp]TR[qq]TR[qr]C[White to capture the marked stones.]AP[goproblems]
(;W[rr]
(;B[os]
(;W[mr]
(;B[qs]
(;W[rq]C[RIGHT])
(;W[sq]C[RIGHT])
(;W[sr]C[RIGHT])
(;W[sp]C[RIGHT])
(;W[rp];B[rq];W[sq];B[or]
(;W[sr];B[pr])
(;W[sp];B[pr])
(;W[pr];B[sr])))
(;B[rq];W[qs]C[RIGHT])
(;B[rs];W[rq]C[RIGHT]))
(;W[rq]
(;B[qs];W[mr]C[RIGHT])
(;B[mr];W[rp]C[RIGHT]))
(;W[rp];B[qs];W[mr];B[rq];W[sq];B[or]
(;W[sr];B[pr])
(;W[sp];B[pr])
(;W[pr];B[sr]))
(;W[sp];B[mr])
(;W[sq];B[mr])
(;W[sr];B[mr]))
(;B[qs];W[mr];B[os];W[rq]C[RIGHT])
(;B[rs];W[rq]C[RIGHT])
(;B[sr];W[rq]C[RIGHT])
(;B[rq];W[qs]C[RIGHT]))
(;W[mr];B[sr]
(;W[rs];B[os])
(;W[ns];B[rs])
(;W[rp];B[os]))
(;W[ns];B[ms];W[or];B[os])
(;W[sr];B[mr])
(;W[rp];B[os];W[rr];B[qs]
(;W[mr];B[rq];W[sq];B[or]
(;W[sr];B[pr])
(;W[sp];B[pr])
(;W[pr];B[sr]))
(;W[rq];B[or]
(;W[mr];B[pr])
(;W[pr];B[mr])))
(;W[rq];B[rr]
(;W[rp];B[sr];W[mr];B[os])
(;W[sr];B[rp];W[sp];B[sq])
(;W[mr];B[os])))