(;GM[1]FF[4]SZ[19]
GN[Difference game]
PC[https://senseis.xmp.net/?posting=11312]AP[GoWiki:2009]
DT[2019-01-30]
C[Diagram from https://senseis.xmp.net/?posting=11312

Difference game]
PL[B]

AB[gf][hf][if][kf][gh][kh][lh][gj][hj][ij][jj][kj][lj][gk][gl][hl][il][jl][kl][ll][gm][gn][hn][in][jn][kn][ln]
AW[he][ie][je][ke][le][me][mf][hg][ig][jg][kg][lg][mg][mh][hi][ii][ji][ki][li][mi][ik][lk][mk][hm][im][lm][mm]
CR[if][lm]


;CR[if][lm]
)
