To see the pretty pattern you have to install the
Java Plug-in
!
Order
2
4 Chessboards
Maneuver
Walter Randelshofer 2007
F2 NR2 · F2 B2 · NR2 B2
R2 NF2 · R2 L2 · NF2 L2
NU2 ND2
(14l)
