Promotion (chess)
in chess, the mandatory immediate replacement of a pawn reaching its 8th rank by the player's choice of a queen, knight, rook, or bishop of the same color

In chess, promotion is the replacement of a pawn with a new piece when the pawn is moved to its last rank. The player replaces the pawn immediately with a queen, rook, bishop, or knight of the same color. The new piece does not have to be a previously captured piece. Promotion is mandatory when moving to the last rank; the pawn cannot remain as a pawn.
Promotion to a queen is known as queening; promotion to any other piece is known as underpromotion. Promotion is almost always to a queen, as it is the most powerful piece. Underpromotion might be done for various reasons, such as to avoid stalemate or for tactical reasons related to the knight's unique movement pattern. Promotion or the threat of it often decides the result in an endgame.
Rules
When a pawn is promoted, it is removed from the board, and the new piece is placed on the square the pawn moved to. The promotion may be to any other piece (except king) regardless of whether the original piece has been captured.
“Promotion (chess)” enters the record as in chess, the mandatory immediate replacement of a pawn reaching its 8th rank by the player's choice of a queen, knight, rook, or bishop of the same color. Crown Archives preserves that source wording while asking what Promotion, chess and mandatory can confirm, complicate or overturn.
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