It would be fun to have a chess variant where en passant applied to every move: - you play bishop a3×e7 taking my queen - I reply with bishop a7×c5, taking yo

It would be fun to have a chess variant where en passant applied to every move: - you play bishop a3×e7 taking my queen - I reply with bishop a7×c5, taking your bishop en passant, getting my queen back (your bishop got taken before it reached my queen) - you reply with knight a4×b6, taking my bishop while it’s on route to intercept your bishop that took my queen. You get back your bishop, it does end up on e7, and I do lose my queen again - I reply, taking your knight while it moves through a5. Your bishop dies again, I get back my queen. - etc. For knight’s moves, I think you’d have to either make a hard rule as to what square they move over, or let the player say how they moved on every move. Also, two pieces could be taken in one move (a piece on the target square and the knight that just hopped over it) Standard chess already has some of this in the rules for castling. There, you aren’t allowed to move your king through a position where it would be attacked by an enemy piece. That’s like saying it can be taken en passant.