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This is a neat idea! I particularly like the care that was taken to avoid allowing indirect checks by double-moves. (IE, the King being in check by a combination of both the opposing player's moves.) <p> I'll note pedantically that while this game might have been inspired by Alice Chess, it doesn't have the defining (to me) characteristic of Alice Chess that moving forces a change between boards. I would describe this more as a two level 3D Chess variant. <p> Chancellor and Marshall are both common names for Rook+Knight. The common name for Bishop+Knight is Cardinal, although Archbishop and Princess are used in a fair number of games as well (although Archbishop is also used for other Bishop variants). <p> A game with 6x7 square boards, double-moves and swapping pieces? This game vaguely resemble a distant cousin of <a href='..//42.dir/mulligan-stew.html'>Mulligan Stew Chess</a>.