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

Completing the shape]
PL[B]

AB[hc][lc]

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

;
)
