--- title: "Diagonal opposition in chess" url: "https://georgelichess.com/glossary/diagonal-opposition.md" canonical_url: "https://georgelichess.com/glossary/diagonal-opposition" last_updated: "2026-11-07" type: "reference" summary: "Diagonal opposition is the standoff in which the two kings sit on the same diagonal with exactly one empty square between them." related: ["https://georgelichess.com/glossary/opposition.md", "https://georgelichess.com/glossary/distant-opposition.md", "https://georgelichess.com/glossary/zugzwang.md", "https://georgelichess.com/glossary/king-and-pawn-endgame.md", "https://georgelichess.com/glossary/shouldering.md", "https://georgelichess.com/glossary/category/endgames.md", "https://georgelichess.com/glossary.md"] --- # Diagonal opposition 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. Diagonal opposition is the standoff in which the two kings sit on the same diagonal with exactly one empty square between them. Diagonal opposition is the standoff in which the two kings sit on the same diagonal with exactly one empty square between them, so the king that has to move must give ground. Most players learn the [opposition](https://georgelichess.com/glossary/opposition.md) on a file, but kings can also face each other along a [diagonal](https://georgelichess.com/glossary/diagonal.md). Put the kings on the same diagonal with a single empty [square](https://georgelichess.com/glossary/square.md) between them, such as c3 and e5, and neither may step onto that middle square because the kings would touch. The side to move has to look for another way out. That side has lost the diagonal opposition. The same logic as before applies: the king that is not on move keeps control. Because a king moves one step at a time in any direction, giving ground along a diagonal often means retreating to a square from which the rival king can walk forward. The player who holds the standoff then steps ahead to a square that wins space or reaches a key square. Diagonal opposition tends to appear when both kings are cutting across the board toward a [passed pawn](https://georgelichess.com/glossary/passed-pawn.md) or toward a pawn they want to attack. Spotting it helps you decide whether a king march is safe. Before you commit, check the diagonals as well as the files and ranks and ask who would be to move if the kings met. A frequent slip is to assume that opposition exists only on files and ranks, and so to walk into a diagonal standoff on the wrong move. Another is overlooking that the standoff does not matter at all unless a pawn or a key square makes the tempo count. ## Example position White to move. The kings share the c3 to e5 diagonal with one empty square between them on d4, so Black holds the diagonal opposition and White must give ground with a different king move. Position (FEN): `8/8/8/4k3/8/2K5/8/8 w - - 0 1` It sits close to [Distant opposition](https://georgelichess.com/glossary/distant-opposition.md). Distant opposition is the long-range form of the kings' standoff: the kings share a line with an odd number of empty squares between them, and the side not on move can keep that count odd until the kings meet. Also worth reading is [Shouldering](https://georgelichess.com/glossary/shouldering.md). Shouldering is a king maneuver in which one king steps into a square that cuts the opposing king off from a pawn or from the route toward it, so the opponent cannot approach. If "Diagonal opposition" 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 - [Opposition](https://georgelichess.com/glossary/opposition.md) - [Distant opposition](https://georgelichess.com/glossary/distant-opposition.md) - [Zugzwang](https://georgelichess.com/glossary/zugzwang.md) - [King and pawn endgame](https://georgelichess.com/glossary/king-and-pawn-endgame.md) - [Shouldering](https://georgelichess.com/glossary/shouldering.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 - [Opposition in chess](https://georgelichess.com/glossary/opposition.md) - [Distant opposition in chess](https://georgelichess.com/glossary/distant-opposition.md) - [Zugzwang in Chess: Definition and Examples](https://georgelichess.com/glossary/zugzwang.md) - [King and pawn endgame in chess](https://georgelichess.com/glossary/king-and-pawn-endgame.md) - [Shouldering in chess](https://georgelichess.com/glossary/shouldering.md) - [Chess terms: Endgames](https://georgelichess.com/glossary/category/endgames.md) - [Chess terms glossary: plain definitions](https://georgelichess.com/glossary.md)