En passant explained: the chess pawn capture beginners miss

The pawn capture that exists for one turn—and only one turn

En passant is the chess capture that seems to break a basic rule: the pawn takes an enemy pawn without landing on the square that pawn occupies. It is not a loophole or an optional house rule, but a precise part of the Laws of Chess. Once the conditions are clear, the move becomes easy to recognise in a club game, online match or school tournament.

The rule in one sentence

En passant, French for “in passing”, lets a pawn capture an opposing pawn that has just moved two squares from its starting square. The capturing pawn moves diagonally forward to the square the other pawn crossed, while the captured pawn is removed from the square where it landed.

That last detail is the source of most confusion. In an ordinary pawn capture, the victim is on the destination square. In en passant, the destination is an empty square and the victim is taken from the adjacent square behind it. Chess.com describes it as the only chess capture in which the capturing piece does not finish on the same square as its victim.

The rule exists because a pawn’s two-square opening move could otherwise let it pass safely beside an enemy pawn. En passant treats that jump as though the pawn had advanced only one square for the purpose of the capture.

Three conditions that must all be true

Before reaching for an en passant capture, check every condition below. If even one is missing, the move is not legal.

The timing condition is absolute. If you play another move first, the right disappears, even if the opposing pawn remains beside yours. This is why the capture can be missed so easily: it is not a standing option that waits on the board.

The capturing pawn also has to be in the right place. A white pawn must have advanced to its fifth rank, while a black pawn must have reached its fourth rank, so that a neighbouring enemy pawn can cross the square it attacks. A pawn that is still on its original rank cannot make this capture merely because an enemy pawn has arrived alongside it.

Finally, the two-square move must have happened in one move. If a pawn reached the neighbouring square by moving one square on each of two turns, en passant is not available. Nor is it enough that the pawn is close: it must have just made the two-square advance.

A passed pawn is a criminal which should be kept under lock and key. Mild measures, such as police surveillance, are not sufficient.

Aron Nimzowitsch, one of the world’s leading chess players and a chess writer

What the capture looks like

Imagine a white pawn on e5 and a black pawn on f7. Black moves that pawn two squares to f5. On White’s immediately following turn, the white pawn may move diagonally to f6 and remove the black pawn from f5. The white pawn does not land on f5; it lands on the square that the black pawn passed over.

The same pattern works in the other direction. A black pawn on its fourth rank may capture a white pawn that has just moved two squares from its starting square, provided the white pawn finishes beside it and the crossed square is attacked by the black pawn. The colours change, but the test is identical.

The move still has to obey the rest of chess law. FIDE states that no piece may be moved if doing so exposes or leaves the king of the same colour in check. An en passant capture can remove a pawn from a different square than the one occupied by the capturing pawn’s destination, so a player should check the newly opened lines around both kings before playing it.

Why chess has this unusual rule

Earlier forms of chess allowed pawns to move only one square at a time. The later two-square advance sped games up, but also let a pawn jump past the attacking range of an opposing pawn and become a passed pawn more easily.

The rule was not adopted everywhere at once. US Chess records that by the early nineteenth century some regions, including England and surrounding areas, allowed en passant while Italy and Germany did not. In a 1614 book, Arthur Saul wrote that a pawn needed the “leave” of the enemy king to pass, showing that the question of a pawn bypassing another was already being discussed.

US Chess says the modern form became universal in the mid-nineteenth century. Wikipedia records that Italy adopted the rule in 1880, ahead of the 1881 Milan tournament. The long period of regional differences is a useful reminder that chess rules were shaped over time rather than delivered as one unchanged package.

How to spot it over the board

Build a small habit after every opponent pawn move: ask whether that pawn started on its home square and travelled two squares. If it did, scan the two adjacent files for one of your pawns on the correct rank. Then locate the square that was crossed and test whether your pawn attacks it.

A quick board routine is: “two squares, beside me, right now”. The first phrase checks the last move, the second checks the pawns’ position, and the third reminds you that the opportunity expires immediately.

Do not assume that taking is always best. En passant is legal, not compulsory, and a normal move may be stronger. First check whether the capture wins material, opens a file, creates a threat or changes the pawn structure in your favour; then check king safety before committing.

For beginners, the safest practical approach is to say the squares aloud while analysing: the enemy pawn moved from its starting square to its landing square, the capturing pawn goes to the crossed square, and the enemy pawn is removed from behind it. That verbal checklist prevents the two common errors—capturing on the wrong turn and placing your pawn on the victim’s square.

Frequently asked questions

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