(;GM[1]FF[4]SZ[19]
GN[[Twisted four\]]
PC[http://senseis.xmp.net/?CornerShapes]AP[GoWiki:2009]
DT[2018-09-03]
C[Diagram from http://senseis.xmp.net/?CornerShapes

[Twisted four\]]
PL[B]

AB[ba][ca][cb][ac][cc][ad][bd]
AW[da][db][dc][dd][ae][be][ce][ee][af][bf]
CR[cd]
LB[ab:a]


;CR[cd]
LB[ab:a]
)
