View source for King's Pawn Game

{{Short description|Chess opening}}
{{Infobox chess opening
|openingname = King's Pawn Game
|image = {{Chess diagram
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|pd|pd|pd|pd|pd|pd|pd|pd
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|pl|pl|pl|pl|  |pl|pl|pl
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|moves = 1.e4 
|ECO = B00–B99, C00–C99
|birth = 
|nameorigin = 
|AKA = e4 <br /> King's Pawn Opening
|chessgid = 21720&move=1.5&moves=e4
}}

The '''King's Pawn Game''' is any [[chess opening]] starting with the move:
: 1. [[b:Chess Opening Theory/1. e4|e4]]

It is the most popular opening move in [[chess]],<ref>{{cite book |last1=Keene |first1=Raymond |last2=Levy |first2=David |date=1993 |title=How to Play the Opening in Chess |isbn=978-0805029376}}</ref> followed by 1.d4, the [[Queen's Pawn Game]].
{{algebraic notation|pos=toc}}

==Principles==
White opens with the most popular of the twenty possible opening moves. Since nearly all openings beginning 1.e4 have names of their own, the term ''King's Pawn Game,'' unlike [[Queen's Pawn Game]], is rarely used to describe the opening of the game.

Advancing the king's pawn two squares is highly useful because it occupies a {{chessgloss|center}} square, attacks the center square d5, and allows the {{chessgloss|development}} of White's {{chessgloss|king's bishop}} and [[queen (chess)|queen]]. [[Bobby Fischer]] said that the King's Pawn Game is "Best by test",<ref>{{cite book |last=Fischer |first=Bobby |author-link=Bobby Fischer |year=1969 |title=My 60 Memorable Games |url=https://archive.org/details/my60memorablegam00fisc |url-access=registration |chapter=45. Fischer–Bisguier, New York State Open 1963 |publisher=[[Simon & Schuster|Simon and Schuster]] |isbn=978-0-671-21483-8 |page=[https://archive.org/details/my60memorablegam00fisc/page/280 280]}}</ref> and proclaimed that "With 1.e4! I win."<ref>{{cite book |last=Seirawan |first=Yasser |year=2003 |title=Winning Chess Brilliancies |publisher=Microsoft Press |isbn=978-1857443479 }}</ref>{{page needed|date=October 2019}}

==Opening categorization and continuations==

King's Pawn Games are further classified by whether Black responds with [[b:Chess Opening Theory/1. e4/1...e5|1...e5]] or not. Openings beginning with [[b:Chess Opening Theory/1. e4|1.e4]] [[b:Chess Opening Theory/1. e4/1...e5|e5]] are called ''Double King's Pawn Games'', ''Double King's Pawn Openings'', ''Symmetrical King's Pawn Games,'' or ''[[Open Games]]'' &ndash; these terms are equivalent. Openings where Black responds to [[b:Chess Opening Theory/1. e4|1.e4]] with a move other than [[b:Chess Opening Theory/1. e4/1...e5|1...e5]] are called ''Asymmetrical King's Pawn Games'' or ''[[Semi-Open Game]]s.''

The ''[[Encyclopedia of Chess Openings]]'' (''ECO'') classifies all King's Pawn Games into volumes B or C: volume C if the game starts with [[b:Chess Opening Theory/1. e4/1...e6|1.e4 e6]] (the [[French Defence]]) or [[b:Chess Opening Theory/1. e4|1.e4]] [[b:Chess Opening Theory/1. e4/1...e5|e5]]; volume B if Black answers [[b:Chess Opening Theory/1. e4|1.e4]] with any other move. The rare instances where the opening does not fall into a more specific category than King's Pawn Game are included in codes B00 (includes the [[Nimzowitsch Defence]] and unusual moves after 1.e4), C20 (includes [[Alapin's Opening]] and unusual moves after 1.e4 e5), C40 (includes the [[Latvian Gambit]] and unusual moves after 1.e4 e5 2.Nf3), and C50 (includes the [[Hungarian Defence]], the [[Giuoco Piano#Giuoco Pianissimo|Giuoco Pianissimo]], and unusual moves after 1.e4 e5 2.Nf3 Nc6 3.Bc4).

The Black responses which are given one or more chapters in the ''ECO'' are given below, ranked in order of popularity according to FIDE-rated games on [[ChessBase]].

===Popular continuations===

*1...c5, the [[Sicilian Defence]], is the most common continuation in modern practice. The Sicilian Defence allows Black to fight for the center by preparing to meet a d2–d4 advance with ...cxd4. Black aims to unbalance the game and fight for a win on move one. The many variations include some of the sharpest and most analysed lines in chess. It has eighty chapters, B20–B99, set aside for it in ''ECO''.
*1...e5 leads to the classical [[Open Game]]s, which includes openings such as the [[Ruy Lopez]], [[King's Gambit]], [[Italian Game]], [[Scotch Game]] and [[Petrov's Defence]]. Also in this opening, Black is generally ready to meet a d2–d4 advance with exd4, though some variations offer the chance to holding the centre with ....d6. These openings are covered in chapters C20–C99 in ''ECO''.
*1...e6 is the [[French Defence]], covered in chapters C00–C19 in ''ECO''. Black's restrained response allows White to play 2.d4. This gives White a spatial advantage, with two pawns in the center to Black's one (after the usual 2... d5) and open lines for both of the bishops, while Black blocks in the light squared bishop and stops it from developing. One or the other player will usually resolve the central tension, either by Black playing ...dxe4 or White advancing with e5. In the latter case, Black typically works to undermine White's pawn center with ...c5 and/or ...f6.
*1...c6 is the [[Caro–Kann Defence]], covered in chapters B10–B19 in ''ECO''. Like the French, this is also considered to be a solid reply, but Black will often need to surrender control over the center (e.g., after 2.d4 d5 3.Nc3 Black usually plays 3...dxe4). On the other hand, the light-squared bishop will usually not wind up trapped behind its own pawns, as is common in the French.
*1...d6 is usually played with the intention of playing the [[Pirc Defence]] (1.e4 d6 2.d4 Nf6 3.Nc3 g6, ''ECO'' codes B07–B09), a hypermodern defence in which Black allows White to construct a dominant center, with the intention of subverting it later. It can also lead to the [[Modern Defence]], [[Pirc_Defence#Early_deviations|Pribyl System]] or [[Philidor Defence]].
*1...g6 is the [[Modern Defence]]. This is related to the Pirc Defence, to which it can transpose. These openings allow White to build up a pawn center with 2.d4, but Black will develop the king's bishop to g7 and strike back at the center. These openings are covered in chapters B06–B09 in ''ECO'', with the [[Modern Defence]] covered in chapter B06.
*1...d5, the [[Scandinavian Defence]] or Center Counter Defence, is a direct strike at the pawn at e4, forcing the situation in the center. After 2.exd5 Qxd5 3.Nc3, however, White gains time by attacking Black's prematurely developed [[queen (chess)|queen]]. Alternatively, Black can play 2...Nf6 (the [[Scandinavian Defence#Main variations|Marshall Gambit]]), when White chooses between 3.d4 Nxd5 4.c4 with a spatial advantage, or 3.c4, when Black usually offers a [[gambit]] with either 3...c6 or 3...e6. The Scandinavian is covered in chapter B01 in ''ECO''.
*1...Nf6 is [[Alekhine's Defence]], which invites White to attack the knight with 2.e5. Black is often forced to spend time moving the knight several times as it is chased around the board, all the while allowing White to build up a broad pawn center. Black counts on the pawns becoming overextended so that he can later undermine them. The Alekhine is covered in chapters B02–B05 of ''ECO''.

===Uncommon continuations===
Apart from these eight responses, all other replies from Black are covered together in ''ECO'' chapter B00. A few of these are not entirely obscure, and have been analyzed in detail.
*1...Nc6 is the [[Nimzowitsch Defence]], an example of a {{chessgloss|hypermodern}} opening in which Black invites White to occupy the centre of the board at an early stage with pawns. After 2.d4, there are two distinctive main lines: 2...e5, favoured by [[Tony Miles]], and 2...d5, introduced and often played by [[Aron Nimzowitsch]].
*1...b6 is [[Owen's Defence]], preparing to develop Black's bishop to b7 to put pressure on White's center.
*1...a6 is the [[St. George Defence]]. Black prepares to advance on the {{chessgloss|queenside}} with 2...b5, but allows White to occupy the center with 2.d4. The opening gained some attention after Tony Miles used it to defeat [[Anatoly Karpov]] in 1980.<ref>{{cite web |title=Karpov vs. Miles, European Team Championship, Skara 1980 |url=http://www.chessgames.com/perl/chessgame?gid=1068157 |website=[[Chessgames.com]]}}</ref>
*1...g5 is the Borg Defence ([[Grob Attack|"Grob"]] backwards) or Basman Defence, often played by [[Michael Basman]]. The move weakens the {{chessgloss|kingside}} severely, but according to ''[[Modern Chess Openings]]'' (''MCO''), Black is only somewhat worse.<ref>[[Nick de Firmian]], ''Modern Chess Openings'', 15th edition, Random House, 2008, p. 384. {{ISBN|978-0-8129-3682-7}}.</ref>

===Rare continuations===
<!-- Note that many of these continuations have redirects to this section. Should this section be renamed, remember to update the redirects as well.
-->The remaining replies to 1.e4 are very rare, and have not received significant and serious attention by masters. ''MCO'' does not cover them, considering them so bad as not to merit discussion.<ref>"Other defenses, such as 1...h5, are not considered as they are simply too bad and need no discussion." ''Modern Chess Openings'', 15th edition, p. 384.</ref> These openings sometimes lead to wild and exciting games, and are occasionally employed by weaker players to get better trained opponents "out-of-{{chessgloss|book move|book}}". Some have exotic names. Such openings are listed below along with instances where they have been used by strong players.
*1...a5, the Corn Stalk Defence. United States chess player [[Preston Ware]] played the Corn Stalk in eleven recorded tournament games from 1880 to 1882, winning four and losing seven. Its chief fault is the very early and therefore potentially unnecessary development of a peripheral piece.
*1...b5, the O'Neill Gambit. Black has no real compensation for the sacrificed pawn.
*1...f5, Duras Gambit, per the book ''Unorthodox Chess Openings''. This is a pawn [[sacrifice (chess)|sacrifice]] which gives Black a lead in development after 2.exf5 Nf6, but without much additional [[Compensation (chess)|compensation]] for the sacrificed pawn. Another move in this position is 2...Kf7, dubbed the "Fred", which is considered a joke opening. After 3.Qh5+, Black has to play g6 and ruin their kingside position. The line was played three times in an exhibition match between [[Ossip Bernstein]] and [[Oldřich Duras]].
*1...h5, the Goldsmith Defence or Pickering Defence. All this move achieves is to waste a tempo and weaken the kingside. It is the reversed version of the Kádas Opening.<ref name="geocities">{{cite web |last=Wall |first=Bill |date=April 30, 2006 |title=Unorthodox Openings |url=http://www.geocities.com/SiliconValley/Lab/7378/unortho.htm |archive-url=https://web.archive.org/web/20090803195057/http://geocities.com/SiliconValley/Lab/7378/unortho.htm |archive-date=2009-08-03 |access-date=2009-04-24}}</ref>
*1...f6 is known as the Barnes Defence after [[Thomas Wilson Barnes]]. This move is clearly inferior, taking away the f6-square from the knight and weakening Black's kingside, although Barnes managed to defeat [[Paul Morphy]] with this defence in 1858.<ref>Philip W. Sergeant, ''Morphy's Games of Chess'', Dover Publications, 1957, pp. 238–40. {{ISBN|0-486-20386-7}}</ref><ref>{{cite web |title=Paul Morphy vs. Thomas Wilson Barnes, casual game (1858), London |url=http://www.chessgames.com/perl/chessgame?gid=1266586 |website=[[Chessgames.com]]}}</ref>
*1...h6, called the Carr Defence in ''Unorthodox Chess Openings''. This defence has also been used by Michael Basman and [[Magnus Carlsen]]. It is likely to transpose to the Borg Defence after 2.d4 g5.
*1...Na6, called the Lemming Defence in ''Unorthodox Chess Openings'', develops the knight to an inferior square.
*1...Nh6, the Adams Defence or Wild Bull Defence. It can transpose to the old [[Hippopotamus Defence|hippo system]].<ref name="geocities"/>

==See also==
*[[List of chess openings]]
*[[Open Game]]
*[[Semi-Open Game]]

==References==
{{reflist|30em}}

===Bibliography===
{{wikibooks|Chess Opening Theory|1. e4|King's Pawn Opening}}
* {{cite book
 | last=de Firmian |first=Nick |author-link=Nick de Firmian
 | year=2008
 | title=Modern Chess Openings |title-link=Modern Chess Openings
 | edition=15th
 | publisher=McKay
 | isbn=978-0-8129-3682-7}}
*{{cite book
 |last1=Hooper 
 |first1=David  
 |authorlink1=David Vincent Hooper
 |last2=Whyld 
 |first2=Kenneth 
 |authorlink2=Kenneth Whyld
 |title=[[The Oxford Companion to Chess]]
 |publisher=[[Oxford University Press]]
 |year=1996
 |edition=2nd
 |origyear=First pub. 1992
 |isbn=0-19-280049-3 }}
*{{cite book
 |last=Schiller
 |first=Eric
 |author-link=Eric Schiller 
 |year=2002 
 |title=Unorthodox Chess Openings
 |edition=2nd
 |publisher=Cardoza  
 |isbn=978-1-58042-072-3}}

{{White's twenty opening moves in chess}}
{{chess}}
[[Category:Chess openings]]