--- title: "Underpromotion in chess" url: "https://georgelichess.com/glossary/underpromotion.md" canonical_url: "https://georgelichess.com/glossary/underpromotion" last_updated: "2026-11-07" type: "reference" summary: "Underpromotion is promoting a pawn to a rook, bishop or knight instead of a queen, chosen because the lesser piece wins or draws more in the position at hand." related: ["https://georgelichess.com/glossary/fork.md", "https://georgelichess.com/glossary/knight-fork.md", "https://georgelichess.com/glossary/double-attack.md", "https://georgelichess.com/glossary/stalemate-trick.md", "https://georgelichess.com/glossary/combination.md", "https://georgelichess.com/glossary/royal-fork.md", "https://georgelichess.com/glossary/category/tactics.md", "https://georgelichess.com/glossary.md"] --- # Underpromotion 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. Underpromotion is promoting a pawn to a rook, bishop or knight instead of a queen, chosen because the lesser piece wins or draws more in the position at hand. Underpromotion is promoting a pawn to a rook, bishop or knight instead of a queen, chosen because the lesser piece wins or draws more in the position at hand. Most pawns that reach the last rank become queens, so choosing otherwise needs a concrete reason. The most frequent one is a [knight](https://georgelichess.com/glossary/knight.md). A knight moves differently from a queen and can give check or attack two pieces in a way a queen cannot from the same [square](https://georgelichess.com/glossary/square.md). A second reason is to avoid [stalemate](https://georgelichess.com/glossary/stalemate.md), where promoting to a queen would leave the opponent with no legal move, though a rook or other piece keeps the game going. A rook or [bishop](https://georgelichess.com/glossary/bishop.md) is occasionally chosen in endings where it keeps a draw or a win that a queen would spoil. To spot an underpromotion, ask what each of the four pieces would attack on the [promotion](https://georgelichess.com/glossary/promotion.md) square, and whether any of them gives check. Compare that with the queen's effect. Do not forget that a pawn can promote on a [capture](https://georgelichess.com/glossary/capture.md), which changes the squares your new piece can reach. Promoting on autopilot is how the chance slips by. Online players with automatic queening switched on, and over-the-board players short of time, sometimes take a queen out of habit and miss a stronger or even winning alternative. ## Example position White plays d8=N+. The knight checks the king on e6 and also attacks the queen on b7, so after any king move Nxb7 wins it and leaves White a rook and a knight against a bare king. A new queen on d8 would not touch the black queen. Position (FEN): `8/1q1P4/4k3/8/8/8/8/R5K1 w - - 0 1` Compare it with [Royal fork](https://georgelichess.com/glossary/royal-fork.md). A royal fork is a fork that attacks the enemy king and queen at the same time, most often with a knight, so the king must move and the queen is lost. Compare it with [Stalemate trick](https://georgelichess.com/glossary/stalemate-trick.md). A stalemate trick is a resource for the side that is losing: it forces the stronger side into a position where the weaker side has no legal move and is not in check, so the game is drawn. A neighboring idea is [Knight fork](https://georgelichess.com/glossary/knight-fork.md). A knight fork is a move that places a knight on a square from which it attacks two or more enemy pieces at once, so the opponent cannot save them all. Knowing "Underpromotion" helps most once you can spot it in a real game. A [first lesson](https://georgelichess.com/book/first-lesson.md) with George Li starts from your own games and finds the tactics you keep missing. ## Related terms - [Fork](https://georgelichess.com/glossary/fork.md) - [Knight fork](https://georgelichess.com/glossary/knight-fork.md) - [Double attack](https://georgelichess.com/glossary/double-attack.md) - [Stalemate trick](https://georgelichess.com/glossary/stalemate-trick.md) - [Combination](https://georgelichess.com/glossary/combination.md) - [Royal fork](https://georgelichess.com/glossary/royal-fork.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 - [Fork in chess](https://georgelichess.com/glossary/fork.md) - [Knight fork in chess](https://georgelichess.com/glossary/knight-fork.md) - [Double attack in chess](https://georgelichess.com/glossary/double-attack.md) - [Stalemate trick in chess](https://georgelichess.com/glossary/stalemate-trick.md) - [Combination in chess](https://georgelichess.com/glossary/combination.md) - [Royal fork in chess](https://georgelichess.com/glossary/royal-fork.md) - [Chess terms: Tactics and combinations](https://georgelichess.com/glossary/category/tactics.md) - [Chess terms glossary: plain definitions](https://georgelichess.com/glossary.md)