In chess, underpromotion is promotion of a pawn that has reached the eighth rank to any piece other than a queen; that is a rook, a bishop or a knight. Image File history File links Chess_zhor_22. ... Image File history File links Chess_zver_22. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links Chess_zver_22. ... Image File history File links Chess_zhor_22. ... A chess table is a table with a chessboard painted or engraved on it. ... Promotion may mean: Promotion (chess), a term used in the game of chess Promotion (marketing), a marketing term Promotion (rank), an increase in position in a hierarchy Promotion (academic), German academic degree that is roughly equivalent to the Ph. ... The pawn (♙♟) is the weakest and most numerous piece in the game of chess, representing infantry, or more particularly pikemen. ... The queen is the most powerful piece in the game of chess. ... A rook (borrowed from Persian رخ rokh) is a piece in the strategy board game of chess. ... A bishop (♗♝) is a piece in the board game of chess. ... The knight moves in an L shape. ...

Since the queen is the most powerful chess piece, it is almost always chosen to replace the promoting pawn. However, promotion to a knight instead can sometimes be useful:

In the diagram on the right, promoting to a queen is only a draw (1. e8Q Qf7+ forces the exchange of queens, and white cannot win with just his bishop), but 1. e8N+ (see algebraic notation) instead wins by virtue of a fork: 1... Kf8 2. Nxc7, and bishop and knight against king is a forced mate. Algebraic chess notation is the method used today by all competition chess organizations and most books, magazines, and newspapers to record and describe the play of chess games. ... The white knight is forking the black king and rook. ...

Because the powers of the rook and the bishop are combined in the queen, there is usually little reason to underpromote to them. The most common cases involve avoiding stalemate: Stalemate is a situation in chess where the player whose turn it is to move has no legal moves but is not in check. ...

Here, 1. f8Q is stalemate; instead 1. f8R Kh6 2. Rh8 mate. The underpromotion here is not forced - 1. Ke7 will allow white to promote to a queen on the next move if wanted - but it is the quickest way to win. Image File history File links Chess_zhor_22. ... Image File history File links Chess_zver_22. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links Chess_zver_22. ... Image File history File links Chess_zhor_22. ...

In the position below (with white to move), white must underpromote the pawn to a rook in order to win the game. (The white king can be on g4 or h4.) If white promotes the pawn to a queen, it is stalemate. If he promotes to a rook, the position is a win, otherwise the game will be a draw.

Underpromotion to knight in practical play is rare, and to bishop or rook is even rarer, but in composed chess problems underpromotion occurs more often. An Allumwandlung is a problem where promotions to all four possible pieces occur. An extreme example is the Babson task, where underpromotions by black are countered by matching underpromotions by white (so if black promotes to a rook, so does white, and so on), white's underpromotions being the only way to mate black in the stipulated number of moves. Image File history File links Chess_zhor_22. ... Image File history File links Chess_zver_22. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links This image is used in the standard chess diagram template. ... Image File history File links Chess_zver_22. ... Image File history File links Chess_zhor_22. ... Sam Loyd, London Era, 1861 Excelsior by Sam Loyd. ... An Allumwandlung (German for complete promotion, sometimes shortened to AUW) is a chess problem where, at some stage in the solution, a pawn (or sometimes pawns) is promoted variously to a knight, bishop, rook and queen. ... The Babson task is a kind of chess problem (composition chess) of the form white to move and mate black in N moves against any defence with the following play: White makes his first move. ...

Underpromotion also features in a number of endgame studies, with the Saavedra position perhaps the most famous example. An endgame study, or just study, is a composed chess position—that is, one that has been made up rather than one from an actual game—presented as a sort of puzzle, in which the aim of the solver is to find a way for White, moving first, to win... The Saavedra position is one of the best known chess endgame studies. ...

See also

• Lasker Trap - an opening trap which features an underpromotion as early as the 7th move.

Position after 5. ... The first moves of a chess game are the opening moves, collectively referred to as the opening. ...

External links

• Examples of underpromotion in practical play from Tim Krabbé