(;SZ[19]AW[fo]AW[bp]AW[cp]AW[dp]AW[ep]AW[bq]AW[fq]AW[gq]AW[gr]AB[cq]AB[dq]AB[eq]AB[br]AB[fr]AB[fs]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[bs];B[ar]
(;W[ds];B[dr]
(;W[gs];B[er]
(;W[cr]C[
ko, outside blocked offRIGHT])
(;W[cs];B[cr]))
(;W[cr];B[cs]C[even though ko is the answer, this result is inferior, as you haven't blocked at G1])
(;W[cs];B[cr]
(;W[gs];B[er])
(;W[es];B[er]))
(;W[es];B[er];W[cs];B[cr]))
(;W[gs];B[ds]
(;W[er];B[es];W[cs];B[dr])
(;W[cs];B[dr])
(;W[cr];B[dr])
(;W[dr];B[er]))
(;W[dr];B[cr])
(;W[cr];B[dr]
(;W[ds];B[cs]C[this ko is inferior, as white hasn't blocked at G1])
(;W[cs];B[ds]))
(;W[es];B[ds]))
(;W[ar];B[bs]
(;W[dr];B[ds]
(;W[er];B[cr])
(;W[cr];B[er]))
(;W[ds];B[dr]
(;W[es];B[cs])
(;W[cs];B[es])
(;W[gs];B[cs]))
(;W[gs];B[dr];W[ds];B[cs]))
(;W[cs];B[ds]
(;W[dr];B[cr];W[es];B[er];W[ds];B[bs])
(;W[cr];B[dr])
(;W[bs];B[cr])
(;W[ar];B[cr];W[bs];B[as];W[bs];B[er])
(;W[gs];B[dr]))
(;W[ds];B[dr]
(;W[gs];B[cs])
(;W[cs];B[cr]
(;W[gs];B[bs];W[es];B[er]
(;W[ds];B[ar])
(;W[ar];B[ds]))
(;W[bs];B[ar];W[gs];B[er])
(;W[ar];B[es];W[bs];B[as];W[bs];B[cs]))
(;W[bs];B[es];W[cs];B[cr])
(;W[es];B[cs])
(;W[ar];B[bs]
(;W[es];B[cs])
(;W[cs];B[es])
(;W[gs];B[cs])))
(;W[gs];B[dr]
(;W[ds];B[cs])
(;W[cs];B[ds]))
(;W[cr];B[dr])
(;W[dr];B[ds]
(;W[cr];B[er])
(;W[er];B[cr])
(;W[cs];B[cr];W[es];B[er];W[ds];B[bs]))
(;W[er];B[dr])
(;W[es];B[ds]))
adum