Assimilation Fusion Chess

Assimilation Fusion Chess is hybrid of Assimilation Chess and Fusion Chess. In this game, simple pieces can combine with pieces of either side to form new compound pieces, and compound pieces can split into simple pieces. It differs from Fusion Chess by letting you assimilate enemy pieces, and it differs from Assimilation Chess by letting you combine your own pieces. It adds to Fusion Chess the ability to increase your forces by capturing enemy pieces, but not in the straightforward Shogi-like way that Fusion Chessgi does.

Setup

Rules

• A simple piece (King, Knight, Bishop, or Rook) combines with another simple piece by moving onto its square.
  • The combined piece is the compound piece which moves as either of the two pieces just combined.
    • King + Bishop = Pope
    • King + Rook = Dragon King
    • King + Knight = Eques Rex
    • Bishop + Rook = Queen
    • Bishop + Knight = Paladin
    • Rook + Knight = Marshall
  • A piece may not combine with another piece of the same type.
    • Knight + Knight = Rook + Rook = Bishop + Bishop = Illegal.
  • Pawns and compound pieces may not combine with other pieces.
  • Whenever a piece can combine with the piece it captured, they do combine.
  • When a piece combines with an enemy piece, the new piece belongs to the player who moved.
• A compound piece may split into its components by moving one of its components, under its own powers of movement, to an empty square.
  • A Rook which separates from a piece must move away as a Rook moves.
  • A Bishop which separates from a piece must move away as a Bishop moves.
  • A Knight which separates from a piece must move away as a Knight moves.
  • A King which separates from a piece must move away as a King moves.
  • The compound piece is replaced by the component which doesn't move away.
• Pawns may promote to Rook, Bishop, or Knight, but not to any compound piece.
• The object is to checkmate your opponent's current royal piece, which may be a King, Pope, Dragon King, or Eques Rex.

Pieces

King	The King moves one space in any direction, but may not move into check. The King is one of four possible royal pieces which a player may have. A King may merge with a Bishop to form a Pope, with a Rook to form a Dragon King, or with a Knight to form an Eques Rex. If any one of these pieces gets checkmated, you lose.
Pope	The Pope moves as a King or Bishop, but may not move into check. The Pope is a royal piece and is formed when a King merges with a neighboring Bishop. When the Pope is on the board, it is the player's only royal piece, and the game is lost if it is checkmated. The Pope may split into its components by making a non-capturing move with one of them.
Dragon King	The Dragon King moves as a King or Rook, but may not move into check. The Dragon King is a royal piece and is formed when a King merges with a neighboring Rook. When the Dragon King is on the board, it is the player's only royal piece, and the game is lost if it is checkmated. The Dragon King may split into its components by making a non-capturing move with one of them. The name for this piece is borrowed from Shogi.
Eques Rex	The Eques Rex moves as a King or Knight, but may not move into check. The Eques Rex is a royal piece and is formed when a King merges with a neighboring Knight. When the Eques Rex is on the board, it is the player's only royal piece, and the game is lost if it is checkmated. The Eques Rex may split into its components by making a non-capturing move with one of them. The name is Latin for Cavalier King.
Knight	The Knight moves as the Knight in Chess, jumping in an L shape, two spaces forward and one to the side. A Knight may merge with a Rook to form a Marshall or with a Bishop to form a Paladin.
Rook	The Rook moves as the Rook in Chess, any number of spaces orthogonally. A Rook may merge with a Knight to form a Marshall or with a Bishop to form a Queen.
Bishop	The Bishop moves as the Bishop in Chess, any number of spaces diagonally. A Bishop may merge with a Knight to form a Paladin or with a Rook to form a Queen.
Queen	The Queen moves as the Queen in Chess, any number of spaces in any single direction. The Queen is a combination of Rook and Bishop. It may separate into its components by moving one of them to an empty space.
Marshall	The Marshall moves as a Rook or Knight. The Marshall is a combination of Rook and Knight, and it may separate into its components by moving one of them to an empty space.
Paladin	The Paladin moves as a Bishop or Knight. The Paladin is a combination of Bishop and Knight, and it may separate into its components by moving one of them to an empty space.
Pawn	The Pawn moves as the Pawn in Chess. It moves forward one space, but is allowed a double move on its first move. A Pawn captures by moving one space diagonally forward. If a Pawn makes a double move to a space alongside an enemy Pawn on its fifth rank, the enemy Pawn may capture it by en passant. Upon reaching the last rank, a Pawn may promote to a Rook, Bishop, or Knight. It may not promote to a Queen, Marshall, or Paladin.

Notation

Equipment

You can play this game with the pieces from a regular Chess set, a Gothic Chess set, or a Grand Chess set. If you use a regular Chess set, you should use a pair of pieces to represent each compound piece. One regular Chess set will have all the pieces you need for this. Sets for Gothic Chess and Grand Chess come with additional pieces that represent all the non-royal compound pieces in this game. But you would still have to use pairs of pieces for the royal compound pieces.

Play on Your Computer

You may play Assimilation Fusion Chess on your computer with Zillions of Games. In April 2001, the board was updated to the one shown on your left. It is made from computer generated textures. This board combines elements of the boards for Fusion Chess and Assimilation Chess. Sound effects were also updated, there was a slight rule change, and the code was optimized a bit.

Download assimilation-fusion.zip