4. Chess variants with modified rules
These chess variants change one of the general rules of chess, such as the objective of the game.
Checkmate the knight – the kings are regular, capturable pieces
Queens are also subject to check and checkmate
Two kings, winning by checkmating any of them
Two kings, winning by defeating both
Two kings, only one is active at any time
Capturing is compulsory, the player who loses all pieces wins
No check or checkmate – players win by capturing all opposing pieces
Players win by capturing all opposing pieces of a particular type.
White has lots of pawns against Black's usual set
Pawns only, and the first promotion wins
The left and right sides of the board are joined, as if the game was played on a cylinder
The bishop and the queen bounce off from the left and the right sides of the board.
The bishop and the queen bounce off from the four edges of the board
Pawns move diagonally and capture orthogonally forwards
Pawns move diagonally and capture orthogonally forwards or sideways.