Alice chess has two basic stipulations: the move must be legal on the board on which it is played, and the square transferred to on the opposite board must be vacant. (Consequently, capture is possible only on the board upon which a piece currently stands.) From D. B. Pritchard's Popular Chess Variants (2000): This wonderful game, appropriately named after Lewis Carroll's eponymous heroine, was the inspiration of Vernon Parton. If you pass over every other game in this book, don't miss this one. Still, alas, little known, Alice chess, now almost a half-century old, continues to attract converts. The body of Alice players grows steadily. Mad Threeparty chess This variant is for three players on a 10×10 board. Each player has a standard set of pieces in his own colour, including an extra but no pawns. Game rules The board starts empty. Players take turns, in clockwise rotation around the board, placing one of their pieces on any vacant square. Kings are placed last, but must not be placed in check. The two kings of each player are marked differently. (For example, of a player's two kings, one might be marked with a star.) Each player attacks the marked king of the opponent to his left, and the unmarked king of the opponent to his right. It is not permitted to check the opponents' other kings. The first player to checkmate a king wins the game. Tweedle chess Also known as twin orthodox chess or double-king chess, each player has two kings and two queens on a 10×10 board. A player wins by checkmating either one of the opposing kings. Game rules The normal chess rules apply, except that kings and rooks can only castle "short" (i.e. with kings shifting two squares toward the nearest corner), and pawns can move one or two steps at any stage. Comments "While his pair of Queens will provide the player's main hopes for victory, his twin monarchs King Tweedledee and King Tweedledum jointly provide his sequence of headaches!" Parton makes note that the only way a player can escape mate from a fork on his two kings is by capturing the checking piece. Boyer remarked that the variant yields "magnificent games" because there are two directions of attack and two points to defend. March Hare chess Game rules For each turn, a player makes two moves: he first moves one of his own