(;SZ[19]AW[op]AW[sp]AW[mq]AW[nq]AW[oq]AW[qq]AW[rq]AW[lr]AW[mr]AW[pr]AW[rr]AW[ls]AB[rn]AB[no]AB[oo]AB[po]AB[so]AB[lp]AB[mp]AB[np]AB[pp]AB[qp]AB[rp]AB[jq]AB[lq]AB[pq]AB[kr]AB[qr]C[assume ko's are good for white]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.00]TM[]PW[White]PB[Black]
(;B[sr];W[qs]
(;B[sq]C[RIGHT])
(;B[ss];W[sq])
(;B[ks];W[sq])
(;B[rs];W[ss]C[ko's are good for white]))
(;B[sq];W[sr]C[black can do better])
(;B[rs];W[qs]
(;B[sr];W[ss]C[ko's are good for white])
(;B[sq];W[sr]))
(;B[or];W[qs]
(;B[ns];W[ps];B[ks];W[os])
(;B[sq];W[sr])
(;B[ks];W[os];B[sq];W[sr])
(;B[os];W[ps]
(;B[sq];W[sr])
(;B[ks];W[ns])
(;B[sr];W[sq])))
(;B[ps];W[qs])
(;B[qs];W[ps]
(;B[sr];W[rs];B[sq]C[this is not optimal. white has no fear of a flower-viewing ko here compared to the correct solution])
(;B[sq];W[sr]
(;B[or];W[rs]
(;B[ks];W[ns])
(;B[ns];W[os]))
(;B[ks];W[or]))
(;B[rs];W[ss])
(;B[or];W[rs]))
(;B[os];W[qs];B[or];W[ps]
(;B[sq];W[sr])
(;B[ks];W[ns])
(;B[sr];W[sq]))
(;B[ss];W[qs])
(;B[ks];W[qs]))