(;GM[1]FF[4]SZ[5]
GN[Optimal play - Black wins]
PC[https://senseis.xmp.net/?AnalysisOfUltimateGo]AP[GoWiki:2009]
DT[2020-05-31]
C[Diagram from https://senseis.xmp.net/?AnalysisOfUltimateGo

Optimal play - Black wins]
PL[W]

AB[ac][bc][bd][cd][dd][ed][be]
AW[ca][ab][bb][cb][db][eb]

;W[cc]C[W1]MN[1]
;B[dc]C[B2]MN[2]
;W[ec]C[W3]MN[3]
;W[aa]C[W5]MN[5]
;B[ae]C[B6]MN[6]
;W[ea]C[W7]MN[7]
;B[ee]C[B8]MN[8]
;B[de]C[B10]MN[10]

;
)
