Whether you’re an avid watcher of tournaments – old or new – between chess masters such as Magnus Carlsen, Emanuel Lasker, and Ian Nepomniachtchi, or you prefer a more hands-on approach through participating in your local chess club tournaments, you’re probably familiar with terms used by commentators and competitors as they play.
A couple of these terms are derived from German, which we’ll be focusing on today, with an explanation of their origins and meanings.
Zugzwang
English translation: “Compulsion to move”
Origin of term: The word combines two German words: Zug (move) and Zwang (compulsion or obligation). It first appeared in German chess literature in the 19th century and was popularised internationally as chess theory evolved.
When it’s used: Zugzwang describes a situation where a player is at a disadvantage because it’s their turn to move. In most cases, if they could pass or skip their turn, they’d be fine, but because they’re required to make a move, they’re forced into a position that worsens their chances.
This concept shows up most often in endgames, where options are limited, and every move carries critical weight. Zugzwang is often the final tactical squeeze before checkmate or a decisive material gain.
Example: White has a king and a pawn versus Black’s king. Black is in zugzwang – if they move, they give way for White to promote the pawn.
Zwischenzug
English translation: “Intermediate move“
Origin of term: From zwischen (between) and Zug (move), the word refers to an in-between move that interrupts the expected flow of play. The concept was noted in German chess theory circles and became a staple term in tactical analysis.
When it’s used: Zwischenzug refers to a surprise move inserted before an expected response, typically during a tactical exchange. Rather than making the obvious or anticipated capture or recapture, a player throws in an unexpected intermezzo that creates a more favourable outcome, such as delivering a check or threatening a more valuable piece.
This move forces the opponent to respond immediately, disrupting their plans and giving the initiator the upper hand.
Example: Instead of recapturing a piece right away, White plays a zwischenzug by checking the king. After the check is resolved, White regains the piece and gains a positional advantage.
Both zugzwang and zwischenzug go beyond just clever words – they represent core tactical and positional ideas that every player needs to understand. Learning these concepts boosts your vocabulary and sharpens your awareness during play.
They appear frequently in:
Tactical puzzles
Grandmaster commentary
Chess literature
Online games with analysis tools (like Chess.com and Lichess)
They’re also terms that have stood the test of time, first appearing in 19th-century writings and still used today in the highest echelons of chess. So next time you’re watching a tournament or analysing your chessboard and you come across a moment of inevitable decline or a surprise tactic, you’ll know exactly what to call it:
Zugzwang – You wish you didn’t have to move, but you must.
Zwischenzug – You throw in a cunning twist before doing what everyone expects.
