(;FF[4]GM[1]CA[UTF-8]AP[besogo:0.0.2-alpha]SZ[19]ST[0]
AB[oa][ob][pc][qb][qc][qd][rd][sb][sd]AW[mb][nb][oc][od][pd][pe][qa][qe][ra][rb][re][se]
C[W to move]
(;W[pb]
;B[pa]
(;W[na]LB[pb:A]
C[Right. Black at A isn't even a ko threat. RIGHT])
(;W[rc]
;B[sc])
(;W[sc]
;B[rc]))
(;W[pa]
(;B[pb]
(;W[na]
;B[sc]
C[Seki])
(;W[rc]
;B[sc]))
(;B[rc]LB[na:A]
C[(Cannot play this because of W at A)])
(;B[sc]LB[pb:A]
C[(Cannot play this because of W at A)]))
(;W[rc]
;B[sc]
C[Seki])
(;W[na]
;B[pb]
(;W[pa]
;B[sc]
C[Seki])
(;W[rc]
;B[sc]
C[Seki])
(;W[sc]
;B[rc]
C[Seki])))