A pawn captures one square diagonally forwards. When a pawn reaches a promotion square, that is, a square on the last row of the board at the opponents side, it promotes. The owner of the pawn may decide to which piece the pawn promotes. In standard chess, this is a queen, rook, knight, or bishop of the same color as the pawn. It is possible to promote to a piece that is not lost, so for instance, by promotion, a player could have two or more queens on the board in standard chess.
Promotion is still to a piece of the same color.
Written by Hans Bodlaender.