1) What stays the same
All pieces move exactly like normal chess. Check, checkmate, en passant—same rules. The only change is where the pieces start.
2) Castling in Chess960 (yes, it exists)
Castling still puts the king and rook onto the same final squares as standard chess: after kingside castling, the king ends on g-file and rook on f-file; after queenside, king ends on c-file and rook on d-file.
The path must be clear and the king can’t move through check—same safety logic, different starting squares.
3) Why Chess960 got popular again
Standard chess openings are heavily mapped. Chess960 reduces opening prep and rewards:piece coordination, tactics, and general principles.
How to start (without feeling lost)
Play a few rapid games, then analyze the first 10 moves only. Your goal is not to “know theory” but to avoid early piece collisions and king exposure.
Use: Game Analyzer