(;GM[1]FF[4]SZ[19]
GN[Mixed three-space extension]
PC[https://senseis.xmp.net/?ThreeSpaceExtension]AP[GoWiki:2009]
DT[2019-02-06]
C[Diagram from https://senseis.xmp.net/?ThreeSpaceExtension

Mixed three-space extension]
PL[B]

AB[hd]
LB[jc:b][kc:c][id:c][jd:a][kd:d]

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

;LB[jc:b][kc:c][id:c][jd:a][kd:d]
)
