Castling
4 minCastling tucks the king away and wakes up a rook. It is the only move where two pieces move together, because chess likes one little exception.
Open lessonEn passant
4 minEn passant is the rule that makes everyone pause the first time. It only happens right after an enemy pawn jumps two squares.
Open lessonPawn promotion
4 minA pawn reaching the end can become a queen, rook, bishop or knight. The queen is common, but a knight can sometimes steal the show.
Open lessonIllegal moves
4 minA move is illegal if it leaves your king in check. Even a beautiful idea has to go back to the bench if the king falls.
Open lesson