En passant is a special pawn capture available only immediately after an opposing pawn advances two squares from its starting rank and lands beside your pawn. The capture treats that pawn as if it had moved only one square.
Three ideas to understand
- The capturing pawn must already stand on its fifth rank: rank five for White or rank four for Black.
- The opposing pawn must have just used its initial two-square move to land next to it. Any intervening move permanently removes the opportunity.
- The capturing pawn moves diagonally to the square the opposing pawn passed over, and the advanced pawn is removed.
Work through a concrete example
After White has a pawn on e5 and Black plays d7-d5, White may play exd6 en passant. The white pawn lands on d6 and the black pawn on d5 disappears.
Show answer
White plays exd6 en passant. The white pawn lands on d6 and the black pawn on d5 is removed.
A reliable thinking process
State the rule in plain language, then test the move against every condition rather than relying on appearance. Check the path, destination, king safety and any one-move exception. Finally change one detail in the position and decide whether the answer changes; this boundary test is what turns a memorized rule into working knowledge.
Common mistake
Players often try the capture several moves later or against a pawn that moved only one square. Another subtle error is exposing their own king to a rook or bishop after both pawns leave the rank.
Practice drill
Recreate an en-passant opportunity on both wings. Before moving, check whether removing the two pawns opens a line toward either king; legality still requires your own king to remain safe.
Check your understanding
Can you construct one legal example and one almost-identical illegal example? Name the single condition that separates them, then explain how an arbiter or chess program would resolve the move.
Take it into your next game
Save one representative position and review it briefly before your next playing session. During the game, do not search for an identical diagram; watch for the same relationship between pieces, squares and pawn structure. Mark the moment when the idea first became relevant, even if you chose another plan. After the game, compare your decision with the lesson and write one adjustment for the next session. This transfer step is more valuable than rereading the article without making a decision.
Finally, explain the position in one sentence without using the lesson title. If the explanation names the relevant squares, pieces and consequence, you understand the idea rather than only recognizing its label. Continue with the related lesson and compare the decision process.