Pressburger King (Super-Transmuting King): King which definitively takes up the nature of the checking piece (and thus loses his royal status). (OR: After being checked, the Super-transmuting King must immediately move like the checking piece and then losing his royal status definitively takes up his nature. When no such move is available, the ST-King side parries the check normally. If the checked King cannot move, it is a mate.)

Bishop-Locust (BL): (1,1) Locust. Moves along Bishop lines only by capturing an enemy unit, arriving on the square immediately beyond that unit, which must be vacant.

Royal piece: Piece that executes a function of the King on the board.

Annan Chess: If two pieces of the same colour are standing close to each other in N-S-direction, the front piece moves only like the rear piece as long as the contact is existing. The front piece is that piece that is closer to the own promotion line. White/Black Pawns on the 1st/8th rank cannot move, but can give their kind of moving to a front piece. Officers moving with the power of a Pawn to the promotion line do not promote; if they make a double-step with the power of a Pawn, they cannot be captured en-passant; but officers with the power of a Pawn can capture a Pawn en-passant.