on either board, and then must make the 'looking-glass' (reflected) move on the other board to complete his turn. Game rules To illustrate, if White opens with 1.Nf3 on board A, then he must play 1.Nc3 on board B to complete his turn (see diagram). If a reflected move would put the player in check, then the first move may not be made. The move of a king or queen must be mirrored on the other board, even if this means moving the king several squares. (For example, in the diagram if White captures 2.Nxe5/A Nxd5/B and Black recaptures 2...Qxd5/B, then Black's reflected move is: 2...Kxe5/A.) Castling is normal, but then the reflected move must be executed to 'castle' the queen. (E.g. if White castles kingside, then reflected queenside castling results in the queen on b1 and the rook on c1.) Gryphon chess Also known as complicacious chess, at the end of a move, the moved piece transforms to a piece of a different type (the next in the series: pawn→knight→bishop→rook→queen→king). So after moving a pawn, the pawn transforms to a knight of the same colour. After moving a knight, it becomes a bishop; and so on. Kings do not transform. Game rules A player may have no more than four knights, four bishops, four rooks, or two queens on the board at any one time, but may have as many as fifteen kings. Checkmating any one of the enemy kings wins the game. Comments "It will be seen at once that a complicacious pawn reaches the status of kingship in five moves, whereas a complicacious Rook does so in two moves. [...] Naturally, a player will not capture the enemy Queen! Neither will he desire to move his own Queen, to provide the necessary target for his opponent to win by." Variations In circular Gryphon chess, players have one king for the entire game as in normal chess. But the transformation sequence is changed and made circular: pawn→knight→bishop→rook→queen→pawn. (So, a piece can transform any number of times without limitation.) Again, no more than four knights, four bishops, four rooks, or two queens are permitted in play at any one time. In simplified Gryphon chess, players start with their king and eight pawns. "The pawns change through the regular Gryphon order and terminate in kingship. Until a player has captured an enemy piece, he is forbidden to move his king