---
title: "Trebuchet in chess"
url: "https://georgelichess.com/glossary/trebuchet.md"
canonical_url: "https://georgelichess.com/glossary/trebuchet"
last_updated: "2026-11-07"
type: "reference"
summary: "The trebuchet is a mutual zugzwang in which two kings stand on either side of a pair of locked pawns, each beside the enemy pawn."
related: ["https://georgelichess.com/glossary/mutual-zugzwang.md", "https://georgelichess.com/glossary/zugzwang.md", "https://georgelichess.com/glossary/opposition.md", "https://georgelichess.com/glossary/reserve-tempo.md", "https://georgelichess.com/glossary/triangulation.md", "https://georgelichess.com/glossary/king-and-pawn-endgame.md", "https://georgelichess.com/glossary/category/endgames.md", "https://georgelichess.com/glossary.md"]
---

# Trebuchet in chess

> **For AI agents:** the complete index of GeorgeLiChess pages is [llms.txt](https://georgelichess.com/llms.txt). Every page is also served as markdown at its URL plus .md.

The trebuchet is a mutual zugzwang in which two kings stand on either side of a pair of locked pawns, each beside the enemy pawn.

The trebuchet is a mutual zugzwang in which two kings stand on either side of a pair of locked pawns, each beside the enemy pawn, so whoever must move loses a pawn and the game.

Picture two pawns locked head to head on the d-file, White's on d4 and Black's on d5. A white king on e5 and a black king on c4 each stand next to the pawn of the other side, yet neither can [capture](https://georgelichess.com/glossary/capture.md) it, because each pawn is guarded by its own king and the capture [square](https://georgelichess.com/glossary/square.md) touches the enemy king. Whoever has to move must step away, the other king takes a pawn, and the pawn ending is easily won. That is the trebuchet: a [mutual zugzwang](https://georgelichess.com/glossary/mutual-zugzwang.md) in which the player to move loses and the player who can wait wins.

The practical lesson is about timing. If you can reach the pattern with your opponent on move, you win; with yourself on move, you lose. So before committing, count the spare tempi each side has elsewhere, and look for a way to hand the move over, perhaps by a [reserve tempo](https://georgelichess.com/glossary/reserve-tempo.md) or a [triangulation](https://georgelichess.com/glossary/triangulation.md).

The typical [mistake](https://georgelichess.com/glossary/mistake.md) is walking into the formation without checking whose turn it will be, or leaving the guard of the pawn too early. Remember that a king beside its own pawn is only safe while the enemy king stays out of reach.

## Example position

White to move in the trebuchet. Each king is beside the enemy pawn but cannot take it, since the pawn is guarded by its own king. White must move the king away, and Black then wins a pawn and the game. With Black on move, the roles are reversed.

Position (FEN): `8/8/8/3pK3/2kP4/8/8/8 w - - 0 1`

If "Trebuchet" has cost you half a point, a [first lesson](https://georgelichess.com/book/first-lesson.md) is a good place to find the pattern behind it: George Li goes through your games and builds a plan.

## Related terms

- [Mutual zugzwang](https://georgelichess.com/glossary/mutual-zugzwang.md)
- [Zugzwang](https://georgelichess.com/glossary/zugzwang.md)
- [Opposition](https://georgelichess.com/glossary/opposition.md)
- [Reserve tempo](https://georgelichess.com/glossary/reserve-tempo.md)
- [Triangulation](https://georgelichess.com/glossary/triangulation.md)
- [King and pawn endgame](https://georgelichess.com/glossary/king-and-pawn-endgame.md)

## Guides that go further

- [How to choose a chess coach](https://georgelichess.com/how-to-choose-a-chess-coach.md): What to decide first, the questions to ask, what a first lesson should show and the red flags to avoid.
- [How much does chess coaching cost?](https://georgelichess.com/chess-coaching-cost.md): Published rates for private, group and subscription chess coaching, with the source and the date of each.
- [The first lesson](https://georgelichess.com/book/first-lesson.md): A game review, a read on your level and a written study plan from George Li.

[Book your first lesson](https://georgelichess.com/book.md) and George Li reviews your games and builds a study plan around them. Questions about lessons: write to hello@georgelichess.com.

## Related

- [Mutual zugzwang in chess](https://georgelichess.com/glossary/mutual-zugzwang.md)
- [Zugzwang in Chess: Definition and Examples](https://georgelichess.com/glossary/zugzwang.md)
- [Opposition in chess](https://georgelichess.com/glossary/opposition.md)
- [Reserve tempo in chess](https://georgelichess.com/glossary/reserve-tempo.md)
- [Triangulation in chess](https://georgelichess.com/glossary/triangulation.md)
- [King and pawn endgame in chess](https://georgelichess.com/glossary/king-and-pawn-endgame.md)
- [Chess terms: Endgames](https://georgelichess.com/glossary/category/endgames.md)
- [Chess terms glossary: plain definitions](https://georgelichess.com/glossary.md)