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