Advanced tactics
Zugzwang
Any move worsens the position, but the player is forced to move.
What is the zugzwang?
Zugzwang is a situation where a player would love to pass, because every available move makes their position worse, yet the rules say they must move. The compulsion itself is the weapon.
Why the zugzwang matters
It is the soul of endgame play. King-and-pawn endings, the opposition, and many fortress-breaks come down to handing the opponent the move when they have nothing good left. Understanding zugzwang turns "drawn-looking" endings into wins.
How to use it to win
Count your opponent's useful moves. If you can reach a position where they are out of waiting moves (no safe piece shuffles, no pawn tempi) a quiet pass-the-move forces a concession.
Try an example puzzle
A real zugzwang puzzle from the app. Black to move. Find the idea, then reveal the line.
Show solution
1. ... Kf5 2. Ke3 Kg4
New to chess? Start with the rule itself: Can you pass your turn in chess?
Drill the zugzwang on thousands of real puzzles, matched to your rating.