Editing Glossary of chess (section)

==E==
{{glossary}}

{{term|term= eat|content= eat {{anchor|Eat}} }}  
{{defn|defn= [slang] To remove the opponent's [[#piece|piece]] or [[#pawn|pawn]] from the board by taking it with one's own piece or pawn.<ref>Nimzowitsch 2016, p. 281</ref><ref>Silman 1998, p. 10</ref> Synonym: ''[[#capture|capture]]''.}}

{{term|term= ECF|content= [[English Chess Federation|ECF]] {{anchor|ECF}} }}
{{defn|defn= The English Chess Federation (ECF) is the governing chess organisation in England and is one of the federations of the [[#FIDE|FIDE]]. It was known as the British Chess Federation (BCF) until 2005 when it was renamed.}}

{{term|term= ECO|content= ''[[Encyclopaedia of Chess Openings|ECO]]'' {{anchor|ECO|ECO code|ECO codes}} }}
{{defn|defn= The ''Encyclopaedia of Chess Openings'' (''ECO''), a standard and comprehensive [[#opening|chess opening]] reference. Also '''''ECO''''' '''code''', a classification system for openings that assigns an alphanumeric code from A00 to E99 to each opening.}}

{{term|term= ECU|content= [[European Chess Union|ECU]] {{anchor|ECU}} }}
{{defn|defn= The European Chess Union (ECU) is the continental association for chess in Europe.}}

{{term|term= edge|content= edge {{anchor|Edge}} }}
{{defn|defn= A small but meaningful advantage in the position against one's opponent. It is often said White has an ''edge'' in the [[#starting position|starting position]], since White moves first (see [[First-move advantage in chess]]).<ref>Pandolfini 2009, p. 301</ref> Cf. ''[[#initiative|initiative]]''.}}

{{term|term= eighth rank|content= eighth rank {{anchor|Eighth rank|eighth ranks}} }}
{{defn|defn= The [[#rank|rank]] on which pawns [[#promotion|promote]] (rank eight for White; rank one for Black). Also called ''last rank''.}}

{{term|term= Elo rating system|content= [[Elo rating system]] {{anchor|Elo rating system|Elo rating|Elo}} }}
{{defn|defn= The Elo rating system is a method for calculating the relative skill levels of chess players, named after [[Arpad Elo]]. Since 2012, [[#FIDE|FIDE]] publishes a monthly international chess rating list using the Elo system.<ref name="S&S_p241">Seirawan & Silman 1994, p. 241</ref>}}

{{term|term= endgame|content= [[Chess endgame|endgame]] {{anchor|Endgame|endgames}} }}
{{defn|defn= The third and last phase of the game, when there are few pieces left on the board. The endgame follows the [[#middlegame|middlegame]].<ref name=S&S_p241 />}}

{{term|term= endgame tablebase|content= [[endgame tablebase]] {{anchor|Endgame tablebase|endgame tablebases}} }}
{{defn|defn= A computerized database of [[#endgame|endgames]] with a small number of pieces, providing [[perfect play]] for both players, and thus completely solving those endgames. As of 2012, tablebases have been calculated for all positions with up to seven pieces.<ref>Moore & Mertens 2011, p. 14</ref>}}

{{Chess diagram small
|tright
|
|rd|nd|bd|qd|kd|bd|nd|rd
|pd|pd|  |pd|  |pd|pd|pd
|  |  |  |  |xx|  |  |
|  |  |pd|pl|pd|  |  |
|  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |
|pl|pl|pl|  |pl|pl|pl|pl
|rl|nl|bl|ql|kl|bl|nl|rl
|After 1.d4 c5 2.d5 e5, White can play 3.dxe6, capturing the e-pawn ''en passant'' on the next move. The white pawn is placed on e6, and the black pawn on e5 is removed from the board.
}}
{{term|term= en passant|content= ''[[en passant]]'' {{anchor|En passant}} }}
{{defn|defn= [from French, "in the act of passing"] The rule that allows a [[#pawn|pawn]] that has just advanced two squares to be captured by an enemy pawn that is on the same [[#rank|rank]] and adjacent [[#file|file]]. The pawn can be taken as if it had advanced only one square. Capturing ''en passant'' is possible only on the next move.<ref>Alburt & Parr 2003, pp. 22–23</ref> Abbr. e.p.}}

{{Chess diagram small
|tright
|
|rd|nd|bd|qd|kd|bd|  |rd
|pd|pd|pd|pd|pd|pd|pd|pd
|  |  |  |  |  |nd|  |
|  |  |  |  |  |  |  |
|  |  |  |  |pl|  |  |
|  |  |  |  |  |nl|  |
|pl|pl|pl|pl|  |pl|pl|pl
|rl|nl|bl|ql|kl|bl|  |rl
|The pawn on e4 is ''en prise''.
}}
{{term|term= en prise|content= ''en prise'' {{anchor|En prise}} }}
{{defn|defn= [from French, "in a position to be taken",<ref>Brace 1977</ref><ref>''[[New Oxford American Dictionary]]''</ref> often italicized] ''En prise'' describes a piece or pawn exposed to a material-winning capture by the opponent. This is either a [[#hanging|hanging]] piece, an undefended [[#pawn|pawn]], a piece attacked by a less valuable attacker, or a piece or pawn defended insufficiently. For instance, 1.e4 Nf6 2.Nf3? leaves White's e-pawn ''en prise''.<ref name="Staunton 2014, p. 57">Staunton 2014, p. 57</ref><ref>[http://www.chesshistory.com/winter/extra/enprise.html "En prise (Chess Term)" by Edward Winter]</ref>}}

{{term|term= e.p.|content= e.p. {{anchor|E.p.|ep}} }}
{{defn|defn= An abbreviation for ''[[#en passant|en passant]]''.}}

{{term|term= epaulette mate|content= [[epaulette mate]] {{anchor|Epaulette mate|epaulette checkmate}} }}
{{defn|defn= A [[#checkmate|checkmate]] position where the king is blocked on both sides by its own rooks.<ref>Pandolfini 1996, p. 102</ref>}}

{{term|term= EPD|content= EPD {{anchor|EPD}} }}
{{defn|defn= An abbreviation for [[#Extended Position Description|Extended Position Description]].}}

{{term|term= equalize|content= equalize {{anchor|Equalize|equalizing|equalise|equalising|equality|equal|equal chances}} }}
{{defn|defn= Or '''equalise'''. To reach a position where the players have equal chances of winning, referred to as ''equality'', or a position that is ''equal''. In the [[#opening|opening]], because White has the [[#first-move advantage|advantage of the first move]], the immediate goal for Black is to achieve equality.<ref>Wilson 1994, p. 55</ref>}}

{{term|term= escape square|content= escape square {{anchor|Escape square|escape squares}} }}
{{defn|defn= See ''[[#flight square|flight square]]''.}}

{{term|term= evaluation|content= evaluation {{anchor|Evaluation|evaluations|eval}} }}
{{defn|defn= Or simply '''eval'''. The analysis of a position. A computer or engine evaluation is a means of assigning a number value to a position, based not on intelligence, but on algorithms, which vary from engine to engine and depend on engine strength. Engine evaluations have foibles and imperfections even when functioning as designed. If an engine describes a position as +2.50, the plus sign ("+") indicates the position is favorable to White; a minus sign ("−") indicates the position is favorable to Black. The number can correspond to the approximate value of pieces, although engines use other factors besides [[#material|material]]. The notation +2.50 indicates that White is ahead by two and one-half pawns. The notation +M4 (or sometimes #4) indicates that White can force checkmate in four moves.<ref>David 2016, pp. 88–96</ref><ref>ChessMN16. "How to Read Engine Evaluations". Chess.com. April 29, 2015</ref><ref>Newborn 2013, pp. 1–14</ref> Cf. ''[[#analysis|analysis]]''.}}

{{term|term= exchange|content= [[Exchange (chess)|exchange]] {{anchor|Exchange|exchanges|exchanged|exchanging}} }}
{{defn|defn= To swap or trade pieces by [[#capture|capture]]. Usually the pieces are of equal value (i.e., rook for rook, knight for knight, etc.), or of bishop for knight (two pieces that are considered approximately equal in value).<ref>Golombek 1977, p. 113, and Silman 1999, p. 432, define an exchange to always be of equal value, but most writers do not: Horton 1952, p. 63; Brace 1977, p. 97; Hooper & Whyld 1996, p. 130; Seirawan & Silman 1994, p. 188.</ref>}}

{{term|term= exchange, the|content= [[The exchange (chess)|exchange, the]] {{anchor|Exchange, the|the exchange|The exchange}} }}
{{defn|defn= The advantage of a rook over a [[#minor piece|minor piece]] (knight or bishop). The player who captures a rook for a minor piece is said to have "won the exchange", the player who has lost the rook has "lost the exchange". An ''[[The exchange (chess)#Exchange sacrifice|exchange sacrifice]]'' is giving up a rook for a minor piece.<ref name="Staunton 2014, p. 57">Staunton 2014, p. 57</ref>}}

{{term|term= exchange variation|content= [[exchange variation]] {{anchor|Exchange variation|exchange variations}} }}
{{defn|defn= This is a type of [[#opening|opening]] in which there is an early, voluntary exchange of pawns or pieces.<ref>Schiller 2003, p. 113</ref>}}

{{term|term= exhibition|content= exhibition {{anchor|Exhibition|exhibitions}} }}
{{defn|defn= Chess games played for the public in various formats and for various purposes, often to promote the game, or a particular match or player, or as a fundraiser. An exhibition may pit two masters against each other, and normally use [[#chess clock|chess clocks]]. In a [[#simultaneous chess|simultaneous exhibition]], one player takes on a number of opponents at once, and it is often not [[#time control|timed]]. A blindfold exhibition is the same but more challenging, since the exhibitor plays without seeing the boards.<ref>Soltis 2002, p. 102</ref>}}

{{term|term= expanded center|content= expanded center {{anchor|Expanded center|expanded centre|expanded centers|expanded centres}} }}
{{defn|defn= The central sixteen squares of the [[#chessboard|chessboard]].<ref>Lawrence & Alburt 2010, p. 88</ref>}}

{{term|term= exposed king|content= exposed king {{anchor|Exposed king|exposed kings}} }}
{{defn|defn= A [[#king|king]] lacking [[#pawn|pawns]] to shield it from enemy attack.<ref>Pandolfini 1992, pp. 56, 94, 118</ref>}}

{{term|term= extended fianchetto|content= extended fianchetto {{anchor|Extended financhetto|extended fianchetti}} }}
{{defn|defn= See ''[[#fianchetto|fianchetto]]''.}}

{{term|term= Extended Position Description|content= Extended Position Description {{anchor|Extended Position Description}} }}
{{defn|defn= A [[#Forsyth–Edwards Notation|Forsyth–Edwards Notation]] derivative format that contains the position on the chessboard, but not the game. It is primarily used to test [[chess engine]]s.<ref>Pawlak, Robert. "Your Computer as Opponent, Coach, and Training Assistant". ''Chess Life'', Vol. 56, issue 11. November 2001. pp. 22–25.</ref> Abbr. EPD.}}

{{glossary end}}