(;SZ[19]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]AW[sn]AW[ro]AW[op]AW[qp]AW[oq]AW[qq]AW[rq]AW[sq]AW[or]AW[pr]AB[rm]AB[pn]AB[rn]AB[po]AB[pp]AB[rp]AB[pq]AB[qr]AB[rr]AB[sr]RU[Japanese]C[Black to play and win](;B[sp];W[so](;B[rp];W[qo](;B[qn];W[qs];B[sm]C[RIGHT];W[sp]C[RIGHT])(;B[sm];W[qs];B[qn];W[sp]C[RIGHT]))(;B[qo];W[qs](;B[rp];W[sp];B[sm]C[RIGHT])(;B[sp];W[rp];B[sm]C[RIGHT])(;B[sm];W[rs];B[rp];W[ss]))(;B[sm];W[qs](;B[qo];W[rs];B[rp];W[ss])(;B[rp];W[rs];B[qo];W[ss])(;B[sp];W[rs];B[qo];W[ss]))(;B[sp];W[qo](;B[sm];W[qs];B[qn];W[rp]C[RIGHT])(;B[qn];W[qs];B[sm];W[rp]C[RIGHT]))(;B[qn];W[qs])(;B[ps];W[rs])(;B[qs];W[ps])(;B[rs];W[ps]))(;B[qo];W[sp];B[sm];W[qs];B[so]C[only ko (black can do better)])(;B[so];W[sp];B[qo];W[qs];B[sm];W[rs])(;B[sm];W[sp](;B[qo];W[qs];B[so]C[only ko (black can do better)])(;B[so];W[qs];B[qo];W[sn]))(;B[qs];W[ps];B[qo];W[sp];B[sm];W[rs])(;B[rs];W[ps];B[sp];W[so];B[qo];W[qs])(;B[ps];W[rs]))