A move that intentionally blocks the coordination, defense, or lines of movement of opponent's pieces. Gaining a tactical advantage by interposing your piece to disrupt the connection between two enemy pieces

A technique of placing a piece in between to block an attack. Also called Intermezzo. Has the same meaning as Zwischenzug, which is more commonly used in English-speaking circles

A pawn with no friendly pawns on adjacent files, making it isolated. It tends to become a weakness as it cannot be supported by other pawns. When it's a d-pawn, it's called an Isolated Queen's Pawn (IQP)