The idea which is clearly associated with the tittle of Endgame is the last moves of the chest game.
An endgame often makes reference to the final stage of a game like chess where players must make certain sacrifices in an attempt to win.
In chess and chess-like games, the endgame is the stage of the game when few pieces are left on the board. Usually in the endgame, the stronger side should try to exchange pieces, while avoiding the exchange of pawns.