- About 'Circe Chess':
'Circe Chess' was invented by Pierre Montreal in 1967.
And the rules of Circe Chess were first detailed by Monreal and Jean-Pierre Boyer in an article in Probleme, 1968.

In this game, captured pieces except a King are reborn on their starting positions as soon as they are captured.
If the square that the rebirth should take place on is occupied by other piece, the captured piece is not reborn.
So, only in that case, it is removed from the board like a standard Chess.

A King can not return to the start position even if it was captured by the enemy.
A Queen returns to the start position when it was captured by the enemy.
Pawns return to the start position on the same file they are captured on.
Rooks, Knights and Bishops return to the starting square which is the same color as the square they are captured on.

A captured promoted pieces is treated as a piece (not a Pawn).
A reborn Pawn regains its initial two-step move option.
Castling with a reborn rook is permitted.

- Objective: To checkmate the opponent's King by attacking it so it can not escape.

- Game and Variants:
This zrf file includes one game(#1) and two variants(#2-3).
In all the variant, White is the first player.
In order to play with Black which is the second player, it is need to press both the 'Switch Sides' button.

#1: Circe Chess (Same Color)
In this variant, Rooks, Knights and Bishops return to the starting square which is the same color as the square they are captured on.

#2: Circe Chess Variant (Same Side)
In this variant, Rooks, Knights and Bishops return to the starting square which is in the same side (either king side or queen side) as they were captured.

#3: Circe Chess Variant (Individual)
In this variant, all pieces except a King return to the individual starting square where they were when the game started.