Zugzwang occurs when every possible move your opponent can make worsens their position. By "wasting" a move or making a slight adjustment, you force them to step away from a key square or weaken their defense.
In the endgame, sometimes the best move is one that forces your opponent to move. EndgameStrategyVid 001
A passed pawn forces your opponent to use their most powerful remaining pieces just to block its path, leaving the rest of the board vulnerable. 3. The Principle of Two Weaknesses Zugzwang occurs when every possible move your opponent