In chess and chess-like games, the endgame is the stage of the game when few pieces are left on the board.
Chess is a two-player strategy board game played on a chessboard, a checkered gameboard with 64 squares arranged in an eight-by-eight grid.
Master the Chess Endgame! - Lecture by GM Susan Polgar by iChess.net
The line between middlegame and endgame is often not clear, and may occur gradually or with the quick exchange of a few pairs of pieces.
Endgames of Norway Chess 2015 - GM Alejandro Ramirez ... by Chess Club and Scholastic Center of Saint Louis
The endgame, however, tends to have different characteristics from the middlegame, and the players have correspondingly different strategic concerns.
In particular, pawns become more important as endgames often revolve around attempting to promote a pawn by advancing it to the eighth rank.
The king, which has to be protected in the middlegame owing to the threat of checkmate, becomes a strong piece in the endgame.
Checkmate is a game position in chess in which a player's king is in check and there is no way to remove the threat.
Whereas chess opening theory changes frequently, giving way to middlegame positions that fall in and out of popularity, endgame theory always remains constant.
Many people have composed endgame studies, endgame positions which are solved by finding a win for White when there is no obvious way to win, or a draw when it seems White must lose.
Usually in the endgame, the stronger side should try to exchange pieces, while avoiding the exchange of pawns.
This generally makes it easier to convert a material advantage into a won game.
The defending side should strive for the opposite.
Chess players classify endgames according to the type of pieces that remain.