En Passant in Chess
En passant is a special pawn capture in chess that is only legal under specific timing conditions. It is one of the three recognised special moves in chess and is governed by strict rule requirements.
Unlike normal captures, en passant applies only when a pawn advances two squares in a single move from its original starting square.
What Is En Passant?
En passant is a special capture that may occur immediately after a pawn moves forward two squares from its original starting position and lands beside an opposing pawn.
In this situation, the opposing pawn may capture it as if it had moved only one square forward.
If the capture is not made on the very next move, the right to capture en passant is permanently lost.
When En Passant Is Allowed
En passant is legal only if all of the following conditions are satisfied:
- A pawn moves forward two squares in a single move from its original starting square.
- It lands on a square horizontally adjacent to an opposing pawn.
- The opposing pawn is on its fifth rank (the rank from which en passant capture is legally possible).
- The capture is made immediately on the very next move.
- The capturing pawn moves diagonally to the square that the advancing pawn passed over.
If any one of these conditions is not met, en passant is not legal.
How the En Passant Capture Works
When en passant is performed:
- The capturing pawn moves diagonally forward one square.
- The captured pawn is removed from the board.
- The pawn is removed from the square it passed over, not the square it landed on.
The destination square for the capturing pawn may appear empty before the move is made. This is normal and does not affect legality.
En passant counts as a standard capture under the rules of chess.
Timing Requirement
The defining feature of en passant is its strict timing requirement.
The capture must be made immediately on the move directly following the two-square pawn advance. If either player makes any other move first, the opportunity to capture en passant disappears permanently and cannot be restored later in the game.
This timing restriction is absolute.
Situations Where En Passant Is Not Legal
En passant is not allowed if:
- The pawn moved only one square forward.
- The pawn did not move two squares in a single move.
- The pawns are not adjacent on the same rank.
- The capturing pawn is not on its fifth rank.
- The capture is attempted after any intervening move.
- The move would expose the capturing player’s king to check.
All standard legality rules, including king safety and turn order, still apply.
Common Misunderstandings About En Passant
Can you capture en passant later in the game?
No. The capture must be made immediately after the two-square pawn move. If not, the right is lost.
Does en passant capture the pawn on the square it landed on?
No. The pawn is removed from the square it passed over.
Can en passant happen after a single-square pawn move?
No. It only applies to a two-square advance from the pawn’s original position.
Is en passant optional?
Yes. A player is not required to capture en passant. It is a legal option, not an obligation.
Does en passant count as a normal capture?
Yes. It is treated as a capture under the rules of chess.