Nuanced Chess Rules Reminder
Chess Board
Castling
Conditions: King & chosen rook unmoved; no pieces between; king not in/passing through/ending in check; not in check now.
- Kingside (O-O): White king g1/rook f1; black g8/f8.
- Queenside (O-O-O): White king c1/rook d1; black c8/d8.
- King moves 2 squares toward rook; rook jumps to king's other side.
En Passant
- Pawn advances 2 squares from start (e.g., e2-e4), lands beside enemy pawn on same rank.
- Enemy pawn captures immediately next move: diagonally to passed square, remove advanced pawn.
Only on immediate reply; pawn acts as if moved 1 square.
Pawn Nuances
- Capture: Only diagonal forward 1 square (move straight only).
- Promotion: Reach last rank → must promote to Q/R/B/N (not king/pawn); underpromotion possible but rare.
3 Queens
Because it is possible to exchange your pawn for any more valuable piece of your choosing if you manage to navigate the pawn to the opponents end of the board, you may select the queen. If the other queens on the board have yet to be captured, then your exchanged pawn becomes the third queen. In this respect it is possible, however unlikely, to have three or more queens, three or more knights, or whatever other high value piece the pawn is exchanged for to exist on the board at the same time. This can be problematic with chess sets that have a limited number of player pieces.