En Passant Explained: The Weirdest Rule in Chess (With Diagrams)
⚡ Quick Answer (TL;DR)
En passant ("in passing") lets a pawn capture an enemy pawn that tried to sneak past it using its two-square opening jump.
- Your pawn must be on its fifth rank.
- The enemy pawn must have just moved two squares, landing right beside yours.
- You capture by moving diagonally behind it — and the enemy pawn is removed, even though you never land on it.
- You must do it immediately. Wait one move and the chance is gone forever.
Ask a room full of casual players to explain en passant and watch the confusion. It's the rule that makes people say "you can't do that!" — the only capture in chess where your pawn doesn't land on the piece it takes. It looks like cheating. It isn't. And once you see why the rule exists, it stops being weird and starts making perfect sense.
📚 On This Page
1. What Is En Passant?
En passant is French for "in passing" — and that's exactly what it describes. When an enemy pawn uses its two-square first move to slip past your pawn, you're allowed to capture it as if it had only moved one square.
It is the only move in chess where the capturing pawn does not land on the captured pawn's square. Your pawn moves diagonally to the square the enemy skipped over — and the enemy pawn vanishes from the board anyway.
2. The Three Conditions
En passant is legal only when all three of these are true. Miss one, and it's not allowed:
3. Step-by-Step Example
Let's walk through it with a real position. White has a pawn on e5; Black's d-pawn is still home on d7:
Black plays d7–d5, jumping two squares to dodge past White's pawn (if the pawn had gone to d6, White would just capture it):
White strikes: exd6 e.p. The white pawn moves diagonally to d6 — the square the black pawn skipped — and the black pawn on d5 is removed:
4. The One-Move Deadline (Where Everyone Slips Up)
This is the part that catches players out, and it's worth burning into memory: en passant expires after one move.
In the position above, suppose White plays Nf3 instead of capturing, and Black replies Nc6:
5. Why Does This Rule Even Exist?
Blame the medieval speed upgrade. Originally, pawns moved one square at a time — always. Around the 15th century, chess sped up: pawns were granted the two-square opening move we use today, so games wouldn't crawl through the opening.
But that created a loophole. A pawn could now use its two-square jump to zip straight past an enemy pawn that was guarding the square it hopped over — escaping a capture that, under the old rules, would have been unavoidable. The new speed rule was accidentally letting pawns cheat their way through enemy lines.
En passant is the patch. It says: you can use the fast lane, but you can't use it to dodge a pawn that was already watching you. Far from being an arbitrary oddity, it's the rule that keeps pawn structures honest — and it's been in the official laws ever since.
6. Common Mistakes
| The Mistake | The Reality |
|---|---|
| "You can capture any pawn that moved two squares" | Only if it lands directly beside your pawn, and your pawn is on its fifth rank. |
| "I can take it next turn" | No — the right expires immediately. One move later, it's gone. |
| "En passant is forced" | No — it's optional, like any capture. Just don't dawdle. |
| "My rook can capture en passant" | No — only a pawn can do it, and only a pawn can be taken this way. |
| "It doesn't count as a real capture" | It absolutely does. The pawn is off the board. |
| "It's an internet-chess invention" | It's been an official rule for 500+ years — see the FIDE Laws of Chess, article 3.7. |
♙ Try It in a Real Game
The best way to make en passant stick is to play it. Jump into a free live game — or drill your tactics on real puzzles first.
Keep Learning
Master the rest of the rules that trip people up: our guide to weird chess rules most players don't know (stalemate, the 50-move rule, underpromotion), how each piece moves, chess notation, and when you're ready to win more games: 10 practical tips for beginners and the 10 most famous checkmates. Official wording lives in the FIDE Laws of Chess; the historical background is covered on Wikipedia.
Frequently Asked Questions
A special pawn capture: when an enemy pawn jumps two squares and lands beside your pawn, you may take it as if it had moved only one square — capturing diagonally behind it. It's the only capture where your pawn doesn't land on the captured piece.
Three conditions: your pawn is on its fifth rank, the enemy pawn just made a two-square jump, and it landed directly beside yours. You must capture on your very next move.
No, it's optional — but if you don't take it immediately, the chance is gone for good.
When pawns gained the two-square opening move in the 15th century, they could sneak past guarding enemy pawns. En passant closes that loophole.
No — only a pawn can capture en passant, and only a pawn can be captured this way.
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