(;GM[1]FF[4]SZ[19]
GN[four groups]
PC[http://senseis.xmp.net/?MagneticStonesIdea]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?MagneticStonesIdea

four groups]
PL[B]

AB[hc][lc][hd][og][qg][ch][ck][qk][fn][fo][fp][fq][lq]
LB[pg:a][ql:a]


;LB[pg:a][ql:a]
)
