(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[9]KM[0.00]
PW[White]PB[Black]AW[fb][ec][gc][cd][dd][ed][be][ce][bg]AB[da][eb][bc][cc][dc][bd]
(;B[]
(;W[ba]
;B[bb]
;W[fa]
;B[ca]
;W[db]
(;B[aa]C[5 points. I.e. already 1 point better than the sub-optimal solution. White could leave this for later, the next move is a 4 point gote move. But it's also fine to capture E8 immediately, as the sequence up to here was a 2 points sente play, just as big as the capture of E8.]
(;W[ea]CR[ba][ab][ac]C[3 points])
(;W[]
;B[ea]CR[ba][ab][cb][db][ac]C[7 points]))
(;B[cb]C[very slightly sub-optimal]
;W[ea]
(;B[ad]
;W[ae]
;B[ab]C[5 points minus 1/3 thanks to the Kou])
(;B[aa]CR[ba][ab][ac]C[5 points minus 1/3 thanks to the Kou])))
(;W[ad]
;B[ba]CR[aa][ca][ab][bb][cb][db]C[6 points]))
(;B[ba]CR[aa][ca][ab][bb][cb][db][ac]C[7 points]))
