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Chess. The rules of chess. (8x8, Cells: 64) (Recognized!)[All Comments] [Add Comment or Rating]

Joe Joyce wrote on Tue, Jul 11, 2006 08:14 PM UTC:

To answer your question [copied from the page Rules of Chess]:

Pawns that reach the last row of the board promote. When a player moves a
pawn to the last row of the board, he replaces the pawn by a queen, rook,
knight, or bishop (of the same color). Usually, players will promote the
pawn to a queen, but the other types of pieces are also allowed. (It is
not required that the pawn is promoted to a piece taken. Thus, it is for
instance possible that a player has at a certain moment two queens.)

The information is there under the section on pawns. 

So, you may promote a pawn to a lost piece, but it is not required that
there be a lost piece available to promote a pawn.