(;GM[1]FF[4]SZ[19]
GN[One-space extension]
PC[http://senseis.xmp.net/?34PointHighApproachLowExtension]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?34PointHighApproachLowExtension

One-space extension]
PL[B]

AB[cd]
AW[ed]

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

;
)
