Chess Rotation is a variant based on standard chess. The file Chess.ZRF, V.1.2, was used as the base file for the changes. The major differences are:

1. Certain pieces may rotate for a given turn instead of move.
2. Only pawns, bishops, and rooks may rotate.
3. All pawns, no matter what orientation, are considered pawns. (This is important in the Elimination Chess Rotation variant)
4. Only pawns in the original orientation (before any rotation, or after cancelling rotations) are allowed to perform an 'en passant' type capture.
5. Pawns may rotate to any other multiple of 45 degrees less than 360 degrees from the current position.
6. Bishops may rotate into a rook, rooks may rotate into a bishop.

1. Certain pieces may rotate for a given turn instead of move.
2. Pawns (normal, weak, berolina, berolina-plus), bishops, rooks, ferses, wazirs, maos, alfils, alfilriders, dabbabas, dabbabariders, camels, camelriders, zebras, zebrariders, princesses, and empresses may rotate.
3. All pawns, no matter what orientation, are considered pawns. (This is important in the Elimination Chess Rotation variant)
4. Only pawns in the original orientation (before any rotation, or after cancelling rotations) are allowed to perform an 'en passant' type capture.
5. Pawns may rotate to any other multiple of 45 degrees less than 360 degrees from the current position.
6. Berolina Plus Chess has been added to the list of variants, and the Berolina Plus Pawn added to the set of pieces.
7. The following pieces rotate into each other: Bishop -- Rook, Fers -- Wazir, Mao -- Reverse Mao, Alfil -- Dabbaba, Alfilrider -- Dabbabarider, Camel -- Zebra, Camelrider -- Zebrarider, Princess -- Empress