Lesson 4 – Special chess moves and other rules you should know
Special Chess Moves: Castling, Promotion, and En Passant
What's up with being able to somehow move a pawn behind another
En Passant - Chess Terms
The only legal move here is en passant and it is checkmate. Black
Chess Rules – Chess House
Pawn (chess) - Wikipedia
8 Special Rules in Chess You Need To Know - The School Of Rook
What is en passant in chess? The special rule every chess player
7 Crucial Chess Rules You Need to Know
Finding All Legal Chess Moves, by Christian Behler
Rules of chess - Wikipedia
Chess Rules: A Quick Summary of the Rules of Chess