Chess
Pawns: during the endgame, pawns become decisive in the result of a game. In the endgame, both players try to promote their pawns by advancing them to the first or last ranks, depending on which side is advancing. When a pawn reaches the end of the board, it can promote to a queen; this action is called queening. It can also promote to a rook, knight, or bishop, called underpromotion, which may be favorable under certain circumstances.