(;GM[1]FF[4]SZ[19]
GN[Three-space extension on the third line]
PC[http://senseis.xmp.net/?ThreeSpaceExtension]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?ThreeSpaceExtension

Three-space extension on the third line]
PL[B]

AB[hc]
LB[jc:a]

;B[lc]C[B1]MN[1]

;LB[jc:a]
)
