Enhanced Chess is a chess variant, built with Rust. The board is a slightly modified fork of gchessboard.
Since enhancements can sometimes create a check or checkmate that the normal rules of chess wouldn't allow, this is a king capture variant. This also means a king can be captured "en passant" on its starting square right after castling, and can move or castle out of, through and/or into check. The board only warns you about checks that come from the regular rules of chess.
Glossary
- Ply
- One piece move by a player.
- Half-turn
- All the plies a player makes before play passes to the other color. In standard chess this is always a single ply, but some enhancements let a player make more than one.
Enhancements
Pawns
- Nepotism: Pawns can promote to a king
- Retreat: Pawns can move backwards
- Sidestep: Pawns can move sideways
- Agile Infantry: Pawns can move diagonally
- Fast Infantry: Pawns can always double push
- Spearmen: Pawns can capture in front
- Opportunist: Pawns can promote on the seventh rank
Knights
- Nimble Cavalry: Knights can move one square like a king
- Fast Cavalry: Knights can move twice in a row, as long as the first move is not a capture
Bishops
- Cartesian Clergy: Bishops can move one square orthogonally
- Mounted Clergy: Bishops can move like a knight
- Diocese: Bishops can jump one friendly piece
- Missionaries: Bishops can jump one enemy piece
- Universal Religion: Bishops can jump one piece of any color
Rooks
- Skewed Rampart: Rooks can move one square diagonally
- Horse Carriage: Rooks can move like a knight
- Paved Way: Rooks can jump one friendly piece
- Embassy: Rooks can jump one enemy piece
- Trade Route: Rooks can jump one piece of any color
Queens
- Amazon Queen: Queens can move like a knight
- Beloved Ruler: Queens can jump one friendly piece
- Diplomatic Immunity: Queens can jump one enemy piece
- Dynastic Marriage: Queens can jump one piece of any color
Kings
- Yield to the Prince: Kings can jump one piece orthogonally
- Yield to the King: Kings can jump one piece in any direction
- Caravan: Kings can castle, even vertically, as long as it is on the same rank/file as a rook
- Cortege: Kings can castle, even vertically, as long as it is on the same rank/file as a rook or queen
Player
- Predatory Pact: Draws are a win for the player
- Laziness: Player can pass their turn
- Permutation: Player can swap two major or minor pieces
- Load Shedding: Player can sacrifice a major or minor piece to move once more
- High Ground: Player can move a major or minor piece a second time if it lands in one of the middle 4 squares
- Second Wind: Player can do a second non capturing move with a piece that just captured
- Ambidextrous: Player can move one major or minor piece from the first 4 files and one major or minor piece from the last 4 files consecutively
- Encore: Player can play one more ply