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E

ECO: Encylopedia of Chess Openings.

Edge: The "outside" squares of the Chess board, namely the first and eighth ranks and the a- and h - files.

Elo rating: The system by which players are rated. Devised by Professor Arpad Elo (1903 - 1993) of Milwaukee and adopted by FIDE in 1970. A beginner might have 900 rating, the average club player 1600, a state champion 2300, and the World Champion 2800.

En passant: From the French, "in passing." Abbreviated e.p. One Pawn can capture another e.p. if the capturing Pawn has reached the fifth rank and the captured Pawn is moved two squares forward on an adjacent file. The capture is made as though the opponent's Pawn had moved only one square forward.

En prise: French for "in a position to be taken". A Chessman is en prise if it is left or moved to a square where it can be captured without loss to the capturing player.

Endgame: Also called the ending. This is the final state of the game, characterized by the relatively few Chessmen on the board. The King is typically used more aggressively in the ending than in the opening or middle-game. One of the most common concerns in the endgame is promotion of Pawns.

Epaulet Mate: Checkmate where the losing King is on the edge of the board with one of his own Chessmen on both sides of the King on the edge.

Equalize: To achieve a position where the opponent's initiative is negated. For example, white usually has the initiative in the opening and black works to equalize, or overcome this initiative. At this point, both sides have an equal chance of winning.

Escape square: A square to which a King in check can move , also called flight square.

Euler: A closed Knight’s tour .

E vergreen Game: Famous Chess game played in 1852 by Anderssen and Dufresne ( Level-1).  It was thus named because Steinitz felt it would always remain as fresh as the day it was played.

Exchange: The trading of a piece for an enemy piece , usually pieces of equal value.

Exchange advantage: The trading of a piece for an enemy piece of greater value.