(;SZ[19]AW[qm]AW[rm]AW[pn]AW[rn]AW[po]AW[qp]AW[oq]AW[pq]AW[pr]AB[ql]AB[rl]AB[om]AB[pm]AB[on]AB[qn]AB[oo]AB[op]AB[mq]AB[nq]AB[nr]AB[or]AB[ps]LB[ps:1]C[how to respond to black 1? try to maximize points in the corner]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.00]TM[]PW[White]PB[Black]PL[W]
(;W[qr]
(;B[qs]
(;W[rs]
(;B[os]
(;W[rq]C[RIGHT])
(;W[pp];B[rr])
(;W[rr]C[RIGHT])
(;W[sr]C[this gives black extra ko threats]))
(;B[pp];W[qo]
(;B[os]C[RIGHT];W[rr]C[RIGHT])
(;B[rr];W[os])
(;B[rq];W[os]))
(;B[rr];W[os])
(;B[rq];W[os]))
(;W[rr];B[rs]C[too easy on black])
(;W[pp];B[rr])
(;W[rq];B[rs]))
(;B[pp];W[qo];B[qs];W[rs];B[os];W[rr]C[RIGHT]))
(;W[qs];B[pp]
(;W[qo];B[qr]
(;W[qq];B[rs])
(;W[os];B[qq];W[ps];B[rs]))
(;W[qq];B[qo])
(;W[qr];B[qo]))
(;W[rr];B[rs]C[not optimal])
(;W[rq];B[rs])
(;W[qq];B[rs])
(;W[rs];B[qr]
(;W[qs]
(;B[pp];W[qo];B[qq])
(;B[rr]))
(;W[rr];B[qq];W[pp];B[rp];W[qo];B[ro];W[qn];B[sn]))
(;W[qo];B[qr])
(;W[pp];B[qr]))