Best Chess Constraint
Anti-King Sudoku is a Sudoku variant that adds a spatial constraint inspired by chess to the standard 9×9 grid. In addition to normal Sudoku requirements that each row, column, and 3×3 box contain digits 1 through 9 exactly once, the anti-king rule prohibits identical digits from appearing in any tw...
Maximummer is a fairy-chess condition that changes how one side selects a move without changing the ordinary chessboard or pieces. On Black's turn, the legal move with the greatest geometric distance between its starting and ending squares must be played; the distance is measured on the board rather...
Maximummer chess is a problem-solving variant where Black is forced to make the geometrically longest legal move available, frequently leading to highly unnatural tactical positions.
Monochromatic chess is a restrictive variant where pieces are only allowed to move to squares of the same color they occupy, effectively splitting the board into two separate games.
Bichromatic chess is an oppositional variant to monochromatic rules, requiring pieces to strictly alternate between light and dark squares with every single move they make.
