(;GM[1]FF[4]SZ[19]
GN[Board divided into black and white halves. Neither side can place a stone at the line dividing the halves, marked by squares.]
PC[http://senseis.xmp.net/?TheNumberOfPotentialPositionsOnAGoBoard]AP[GoWiki:2009]
DT[2012-07-17]
C[Diagram from http://senseis.xmp.net/?TheNumberOfPotentialPositionsOnAGoBoard

Board divided into black and white halves. Neither side can place a stone at the line dividing the halves, marked by squares.]
PL[B]

AB[ak][bk][ck][dk][ek][fk][gk][hk][ik][jk][kk][lk][mk][nk][ok][pk][qk][rk][sk][bm][cm][fm][km][nm][om][qm][sm][bn][dn][fn][jn][ln][nn][qn][sn][bo][co][fo][jo][ko][lo][no][qo][ro][bp][dp][fp][jp][lp][np][qp][sp][bq][cq][fq][gq][hq][jq][lq][nq][oq][qq][sq]
AW[bb][db][fb][hb][jb][lb][nb][ob][pb][rb][sb][bc][dc][fc][hc][jc][lc][oc][rc][bd][dd][fd][hd][id][jd][ld][od][rd][sd][ce][ee][he][je][le][oe][re][cf][ef][hf][jf][lf][of][rf][sf][ai][bi][ci][di][ei][fi][gi][hi][ii][ji][ki][li][mi][ni][oi][pi][qi][ri][si]
SQ[aj][bj][cj][dj][ej][fj][gj][hj][ij][jj][kj][lj][mj][nj][oj][pj][qj][rj][sj]


;SQ[aj][bj][cj][dj][ej][fj][gj][hj][ij][jj][kj][lj][mj][nj][oj][pj][qj][rj][sj]
)
