(;AW[rs]AW[qr]AW[qq]AB[ps]AB[pr]AB[pq]AB[oq]AB[op]AB[qp]AB[qo]AB[qn]AW[pp]AW[po]AW[oo]AW[no]AW[nq]AW[nr]C[Black to win]AP[goproblems]
(;B[rr];W[rq];B[sr];W[sq]
(;B[qs];W[ss]
(;B[rp];W[np]
(;B[rr]C[RIGHT])
(;B[sr]C[RIGHT]))
(;B[rr];W[or]
(;B[sr];W[rs];B[rp];W[ss]
(;B[rr]C[RIGHT];W[os];B[sr]C[RIGHT])
(;B[sr];W[rr];B[sp]C[RIGHT]))
(;B[rp];W[os];B[sr]C[RIGHT]))
(;B[sp];W[rp];B[ro];W[so];B[rr];W[sr];B[sn];W[or])
(;B[sr];W[or];B[rr];W[rs];B[rp];W[ss]
(;B[rr]C[RIGHT])
(;B[sr];W[rr];B[sp]C[RIGHT])))
(;B[rp];W[np];B[qs];W[ss]
(;B[rr]C[RIGHT])
(;B[sr]C[RIGHT])))
(;B[rq];W[rr]
(;B[rp];W[np];B[sr];W[os];B[sq];W[or])
(;B[sq];W[rp]
(;B[ro];W[np];B[sr];W[or];B[sp];W[os])
(;B[sr];W[sp]))
(;B[sr];W[rp]
(;B[sp]
(;W[sq])
(;W[ro]
(;B[sq];W[so])
(;B[so];W[rn];B[rm];W[sq])))
(;B[sq];W[sp])))
(;B[qs];W[rr]
(;B[rp];W[np];B[rq];W[or])
(;B[rq];W[rp]))
(;B[sr];W[rr]
(;B[rq];W[rp]
(;B[sp]
(;W[sq])
(;W[ro]
(;B[sq];W[so])
(;B[so];W[rn];B[rm];W[sq])))
(;B[sq]))
(;B[sq];W[rp]
(;B[qs];W[sp]
(;B[ro];W[or];B[so];W[os];B[rq];W[np])
(;B[rq];W[ss];B[sq];W[or];B[rq];W[sr];B[rq];W[sq];B[ro];W[os]))
(;B[rq];W[sp])))
(;B[sq];W[rr];B[rq];W[rp]
(;B[ro];W[np];B[sr];W[or];B[sp];W[os])
(;B[sr];W[sp]))
(;B[rp];W[rr];B[rq];W[np];B[sr];W[os];B[sq];W[or]))
marwin