(;GM[1]FF[4]SZ[19]
GN[Difference game, Black plays first]
PC[http://senseis.xmp.net/?BQM222]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BQM222

Difference game, Black plays first]
PL[B]

AB[ga][ia][ja][gb][ib][mb][nb][ob][pb][gc][hc][kc][mc][oc][qc][rc][ad][gd][ld][md][qd][sd][ae][be][ce][de][ee][ge][ke][le][pe][qe][re][af][cf][ef][gf][if][jf][qf][sf][ag][gg][ig][og][bh][hh][ih][jh][kh][lh][mh][bi][ci][hi][mi][aj][cj][gj][hj][ij][jj][kj][nj][oj][qj][ak][bk][fk][hk][mk][nk][ok][pk][qk][rk][sk][dl][fl][gl][hl][ml][pl][sl][am][bm][cm][dm][gm][lm][mm][qm][sm][an][cn][dn][kn][ln][mn][nn][rn][sn][do][io][lo][oo][dp][ep][fp][gp][ip][lp][mp][fq][hq][iq][mq][nq][oq][pq][ar][er][gr][ir][mr][or][qr][ds][es][ns][qs][rs]
AW[ka][bb][eb][fb][jb][kb][lb][ac][dc][fc][ic][lc][nc][pc][bd][cd][ed][fd][hd][jd][kd][nd][od][pd][he][ie][je][bf][df][hf][kf][nf][of][pf][rf][bg][cg][eg][hg][jg][kg][lg][mg][ng][qg][rg][ch][dh][fh][gh][nh][ph][rh][di][gi][li][ni][pi][qi][dj][fj][lj][mj][pj][rj][sj][ck][dk][ek][ik][jk][kk][lk][al][bl][cl][el][il][jl][ll][nl][ol][rl][em][hm][jm][km][nm][om][rm][bn][en][gn][in][jn][on][pn][qn][ao][co][eo][fo][go][ho][jo][ko][mo][no][qo][ro][so][ap][bp][cp][hp][jp][np][op][pp][dq][eq][jq][lq][qq][rq][br][dr][jr][lr][rr][bs][cs][ls][ms]
CR[li]

;B[js]C[B1]MN[1]
;W[ki]C[W2]MN[2]
;B[ji]C[B3]MN[3]
;B[is]C[B9]MN[9]

;CR[li]
)
