Definition:Chess/Rules/Capture/Pawn/En Passant
Definition
En passant pawn capture is a method by which a chess pawn may capture a pawn of the opposite colour in particular circumstances.
Let pawn $a$ be on the player's $5$th rank.
Let pawn $b$ be of the opposite colour to pawn $a$.
Let pawn $b$ be on its starting position, on one of the files adjacent to the one occupied by pawn $a$.
Let pawn $b$ move forward $2$ spaces, in the process crossing over one of the squares which is under attack from pawn $a$.
Then pawn $a$, on its next move only, may move into that square crossed over by pawn $b$, and capture pawn $b$ "while it is passing".
This mode of capture is known as capture en passant.
a | b | c | d | e | f | g | h | ||
8 | 8 | ||||||||
7 | 7 | ||||||||
6 | 6 | ||||||||
5 | 5 | ||||||||
4 | 4 | ||||||||
3 | 3 | ||||||||
2 | 2 | ||||||||
1 | 1 | ||||||||
a | b | c | d | e | f | g | h |
In the above diagram:
- the black pawn on $\text b 7$ moves forward to $\text b 5$
- the white pawn on $\text c 5$ then moves to $\text b 6$, while capturing the black pawn which is actually on $\text b 5$.
The board then looks like this:
a | b | c | d | e | f | g | h | ||
8 | 8 | ||||||||
7 | 7 | ||||||||
6 | 6 | ||||||||
5 | 5 | ||||||||
4 | 4 | ||||||||
3 | 3 | ||||||||
2 | 2 | ||||||||
1 | 1 | ||||||||
a | b | c | d | e | f | g | h |
Linguistic Note
The term en passant is a French phrase that literally means in passing.
It is pronounced something between on passon and ong passong.