H. G. Muller wrote on Fri, Nov 15, 2019 07:21 PM UTC:
French translation:
Marseillais Chess is a chess variant where each player plays two successive moves. On top of the rules for the normal game, the players must honor the following rules:
A player that is in check must evade the check on his first move.
If a player checks a King with his first move, he loses the capability to play a second move.
If, after having played his first move, a player finds himself in a position where it is impossible to play a legal move, this is considered a stalemate.
En-passant capture should be performed with the first move, except when two e.p. captures are possible. In the latter case, the two e.p. captures can be made in each of the two moves.
Pushing Pawns two spaces beyond their initial location cannot be considered a double move (two advances of one space). So the player can make his second move after that.
French translation:
Marseillais Chess is a chess variant where each player plays two successive moves. On top of the rules for the normal game, the players must honor the following rules: