The Multiroyal Tag

Description

A player has more than one royal piece. (They may be required to keep all of them safe or just always have one on-board.)

Anti-King Chess. Each player has both a King and an Anti-King to protect; Anti-Kings are in check when not attacked. (8x8, Cells: 64) (Recognized!) (1)
Double Chess. Two sets of pieces on 16 by 12 board. (16x12, Cells: 192) (1)
Double King Chess. With two kings on a 10 by 8 board. (10x8, Cells: 80) (1)
Spartan Chess. A game with unequal armies. (8x8, Cells: 64) (1)
Tim's 3d Chess. On a 5x5x5 board with two kings per player. (5x5x5, Cells: 125) (1)
Two Kings Chess. The queen is replaced by a second king. (8x8, Cells: 64) (1)

None.