(;GM[1]FF[4]CA[UTF-8]
SZ[19]RU[Japanese]KM[0]TM[1800,0,30,5]PW[]PB[]AB[bs][as][aq][ar]AW[br][bq][bp][bo][co][dp][dq][er][es]AB[cp][ap][ao][an][dn][do]AE[bn]AB[am][bm]AE[cm]AB[cn][eq][fq][fr][fo][fm]PL[W]C[what can white do?]
(;W[cs]CR[cs]
;B[cr]CR[cr]
(;W[dr]CR[dr]C[RIGHT
ko is best])
(;W[ds]CR[ds]
;B[cq]CR[cq]
;W[dr]CR[dr]
;B[cq]CR[cq])
(;W[cq]CR[cq]
;B[ds]CR[ds]))
(;W[cr]CR[cr]
;B[cs]CR[cs])
(;W[dr]CR[dr]
;B[cs]CR[cs])
(;W[ds]CR[ds]
;B[cs]CR[cs])
(;W[cq]CR[cq]
;B[cs]CR[cs])
(;W[bn]CR[bn]
;B[cr]CR[cr])
(;W[ep]CR[ep]
;B[cr]CR[cr]
;W[fp]CR[fp]
;B[gp]CR[gp]
(;W[gq]CR[gq]
;B[gr]CR[gr]
;W[go]CR[go]
;B[hq]CR[hq]
;W[eo]CR[eo]
;B[fn]CR[fn])
(;W[go]CR[go]
;B[gq]CR[gq]
(;W[eo]CR[eo]
;B[fn]CR[fn])
(;W[fn]CR[fn]
;B[eo]CR[eo]))))