(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[9]KM[0.00]
PB[Noir]AW[ed][cf][ff][dg][fg]AB[gd][gf][gg][gh]
(;B[di]
(;W[ci]
;B[fi]
;W[ch]C[Optimal sequence ;  7 points in sente for Black (see the sequence with White starting)]
(;B[]
;W[dh]
;B[ei]
;W[fh]
;B[eh]
;W[eg]
;B[gi])
(;B[eh]
;W[fh]
;B[eg]
;W[ef]
;B[gi]))
(;W[fi]
;B[fh]
;W[eh]
;B[ei]
;W[ci]
;B[gi]
;W[dh]
;B[fi]
;W[ch]C[In this case, it is also worth 7 points, but with a stone at E3, the extra prisoner would cost 1 point])
(;W[eh]
;B[ei]
;W[fi]
;B[fh]
;W[ci]
;B[gi]
(;W[dh]
;B[fi]
;W[ch])
(;W[ch]C[slightly worse in this case , as an extra liberty in the corner might make a difference :]
;AW[gc][hc][fd][hd][id][fe]AB[ge][he][ie]C[ce groupe est vivant, mais ]
;B[fi]
;W[dh]
;B[cc]
;W[hg]
;B[ih]
;W[hh]
;B[ig]
;W[hi]
;B[if]C[a 7 points loss]))
(;W[dh]C[the worst move here !]
;B[ci]
;W[fi]C[best way to limit the damage]
;B[fh]
;W[eh]
;B[ei]
;W[bi]
;B[gi]
;W[ch]
;B[fi]
;W[bh]))
(;B[]
(;W[fi]C[If white can play first, this is the best move]
;B[fh]
;W[eh]
;B[]C[G1would be gote]
;W[gi]
;B[hi]
;W[ei]
;B[hh]C[7 points  difference with the jump : H1and H2, C1, C2,D 1and D2,half-point at G1 and another at E3])
(;W[fh]
;B[fi]
;W[ei]
;B[gi]
;W[eh]C[Black has 2 more points])))