I’d just like to interject for a moment. What you’re refering to as en passant, is in fact, chess/en passant, or as I’ve recently taken to calling it, chess plus en passant. En passant is not a move unto itself, but rather another free component of a fully functioning chess game made useful by the chessboard, pieces and legal moves comprising a full game as defined by FIDE rules.
I’d just like to interject for a moment. What you’re refering to as en passant, is in fact, chess/en passant, or as I’ve recently taken to calling it, chess plus en passant. En passant is not a move unto itself, but rather another free component of a fully functioning chess game made useful by the chessboard, pieces and legal moves comprising a full game as defined by FIDE rules.
Are the FIDE rules of chess open source? If not, could we build our own free and open source chess rules. I could host them on my 1997 Debian server