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Chess From Wikipedia, the free encyclopedia.

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Listen to this article · (info) This audio file was created from the revision dated 2005-09-05, and does not reflect subsequent edits to the article. (audio help) More spoken articlesFor other meanings, see Chess (disambiguation). Chess

From left, a white king, black rook and queen, white pawn, black knight, and white bishop in a set of Staunton chess pieces. Players: 2 Age range: 6 and up Setup time: < 2 minutes Playing time: standard "home plays":~1 hour FIDE tournament games:~2 hours blitz games:~10 minutes

Rules complexity: Medium Strategy depth: High Random chance: None Skills required: Tactics, Strategy

Chess, sometimes also known as international chess, is a board game and mental sport for 2 players. It is played on a square board of 8 rows (called ranks) and 8 columns (called files), giving 64 squares of alternating colour, light and dark, with each player having a light square at their bottom right when facing the board. Each player begins the game with 16 pieces that each move and capture other pieces on the board in a unique way: eight pawns ( or ♙), two knights ( or ♘), two bishops ( or ♗), two rooks ( or ♖), one queen ( or ♕) and one king ( or ♔). One player (who is always first to move) controls the white pieces; the other player controls the black pieces.

In chess, when a king is directly attacked by one or more of the opponent's pieces, the player is said to be in 'check'. When in check, only moves that can escape from check are permitted. The object of the game is to checkmate your opponent- this is when their king is checked, and no move can be made that would escape from check.

Contents [hide] 1 Introduction 2 History 3 Gameplay 3.1 Rules of chess 3.2 Strategy and tactics 4 Modern chess 5 Notation 6 Computer chess 7 More information 7.1 Famous chess games 7.2 History of chess 7.3 World chess champions 7.4 Chess literature 7.5 Chess in the arts and literature 8 References 9 External links 9.1 General 9.2 Games for download. 9.3 Free chess software: Programs/Engines/Databases/Utilities 9.4 Organizations

[edit] Introduction

Chess. Starting position Chess is not a game of chance; it is based solely on tactics and strategy. Nevertheless, the game is so complex that not even the best players can consider all contingencies: although only 64 squares and 32 pieces are on the board, the number of possible games that can be played far exceeds the number of atoms in the universe (see "Shannon number").

Chess is one of the world's most popular games; it has been described not only as a game, but also as an art, science, and sport. Chess is sometimes seen as an abstract wargame; as a "mental martial art", and teaching chess has been advocated as a way of enhancing mental prowess. Chess is played both recreationally and competitively in clubs, tournaments, online, and by mail (correspondence chess). Many variants and relatives of chess are played throughout the world. The most popular, in descending order by number of players, are Xiangqi (in China), Shogi (in Japan), and Janggi (in Korea).

[edit] History Main article: Origins of chess

Persian youth playing chess with two suitors Illustration to the "Haft Awrang" of Jami, in the story A Father Advises his Son About Love Freer and Sackler Galleries, The Smithsonian Institution, Washington, DC. A chess table is a table with a chessboard painted or engraved on it. The photograph shows a chess table in a park. Two oldtimers playing chess on a Central Park bench in New York City, May 1946.Many countries claim to have invented the chess game in some incipient form. The most commonly held belief is that chess originated in India, where it was called Chaturanga, which appears to have been invented in the 6th century AD.

Another theory exists that chess arose from the similar game of Chinese chess, or at least a predecessor thereof, existing in China since the 2nd century B.C. Joseph Needham and David Li are two of many scholars who have favored this theory.

Chess eventually spread westward to Europe and eastward as far as Japan, spawning variants as it went. From India it migrated to Persia, where its terminology was translated into Persian, and its name changed to chatrang.

From Persia it entered the Islamic world, where the names of its pieces largely remained in their Persian forms in early Islamic times. Its name became shatranj, which continued in Spanish as ajedrez and in Greek as zatrikion, but in most of Europe was replaced by versions of the Persian word shāh = "king".

There is a theory that this name replacement happened because, before the game of chess came to Europe, merchants coming to Europe brought ornamental chess kings as curiosities and with them their name shāh, which Europeans mispronounced in various ways.

checkmate: This is the English rendition of shāh māt, which is Persian for "the king is finished". In Arabic it means "the shāh is dead", but shāh is not a usual Arabic word for "king" (except sometimes in chess). rook: This came via Arabic from the Persian rukh, which means "chariot", but also means "cheek" (part of the face), and the mythical bird of great power called the roc. bishop. Arabic al-fīl ( from Persian pīl ) means "the elephant", but in Europe and the western part of the Islamic world people knew little or nothing about elephants, and the name of the chessman entered Western Europe as Latin alfinus and similar, a word with no other meaning (in Spanish, for example, it evolved to the name "alfil"). The English name "bishop" is a rename inspired by the conventional shape of the piece. In Russia, the piece is, however, known as slon = "elephant". queen. Persian farzīn = "vizier" became Arabic firzān, which entered western European languages as forms such as alfferza, fers, etc but was later replaced by "queen". The game spread throughout the Islamic world after the Muslim conquest of Persia. Chess eventually reached Russia via Mongolia, where it was played at the beginning of the 7th century. It was introduced into Spain by the Moors in the 10th century, and described in a famous 13th century manuscript covering chess, backgammon, and dice named the Libro de los juegos. Chess also found its way across Siberia into Alaska.

[edit] Gameplay [edit] Rules of chess

The eight queens puzzle is the problem of putting eight queens onto a chess board such that none of them are attacking each other. This is one of the twelve solution. For more details on this topic, see Rules of chess. When a game of chess begins one player has been assigned the sixteen black pieces while the other has the white pieces. The colors are chosen either by a friendly agreement (a game of chance) or by a tournament director[1]. White always moves first and has a slight advantage over black. The chess pieces should be set up on a standard chessboard with a white square in the bottom right hand corner.

Each chess piece moves a different way. The rook moves along horizontal and vertical lines, while the bishop moves in diagonal lines of the same color. The queen is a combination of the rook and bishop (it can move diagonally, horizontally and vertically). The knight can jump over occupied squares and moves in an L shape. Pawns can move forward just one square at a time (they can move two squares if they haven't moved off their starting square). Pawns are unusual because they attack diagonally and not in the direction of movement. The King is the most important piece, yet it can only move to an adjacent square.

When a piece is captured (or taken) the attacking piece moves towards and replaces the enemy piece on its square (en passant being the only exception). The king cannot be captured in regular chess, because if a king is under attack (known as check) then the player must move the king out of check. If a player is unable to get their king out of check it is called checkmate and the game is over.

Chess games do not have to end in checkmate. Often at the higher level of chess, games end in a draw (tie). A draw can occur under many situations including: mutual agreement to draw, stalemate, threefold repetition or the fifty move rule.

[edit] Strategy and tactics For more details on this topic, see Chess strategy and tactics. Chess openings are a sequence of moves, often memorized, which will help a player build up their position and prepare for the middlegame. Openings are often designed to take hold of the center of the board (e4, e5, d4 and d5), develop pieces, protect the king and create a strong pawn structure. It is often important for a player to castle (a special move that moves the king behind a row of pawns) to protect the king. See the list of chess openings for more information.

The black knight on e6 is pinned to its king by the white bishop.

When taking and trading pieces in chess the chess piece point values become important. Valuations differ slightly from book to book, but generally queens are worth 9 points, rooks are worth 5, bishops and knights are worth 3 and pawns are worth 1. Since the king's loss ends the game it is invaluable. The actual value and importance of a piece will vary based upon the position. If a player performs a sacrifice (ex. exchange sacrifice) they are choosing to ignore the standard valuation of their pieces for positional or tactical gains.

A few positional elements are common to most chess tactics and traps. A fork is a situation where a piece is moved such that it is attacking two other pieces simultaneously. It usually is difficult for the other player to protect both of their pieces in one move. Pins can be used to prevent the movement of an enemy piece by threatening any pieces behind it should it move. Skewers are a kind of reverse pin where the more valuable piece is placed in front of a less important one. A discovered attack is an attack where a piece moves and uncovers a line for another piece which does the attacking. Other tactical elements include: zwischenzug, undermining, overloading and interference.

During the endgame pawns and kings become relatively more powerful pieces as both sides often try to promote their pawns. If one player has a large material advantage checkmate may happen quickly in the endgame, but if the game is relatively even tablebases and endgame study are essential. Controlling the tempo (time used by each move) becomes especially important when fewer pieces are left on the board. In some cases, a player will have a material advantage, but won't have enough pieces to force a checkmate.

[edit] Modern chess

A typical Staunton-design set and clockEarly on, the pieces in European chess had limited movement; bishops could only move by jumping exactly two spaces diagonally, the queen could move only one space diagonally, pawns could not move two spaces on their first move, and there was no castling. By the end of the 15th century, the modern rules for the basic moves had been adopted from Italy: pawns gained the option of moving two squares on their first move and the en passant capture therewith, bishops acquired their modern move, and the queen was made the most powerful piece; consequently modern chess was referred to as "Queen's Chess" or "Mad Queen Chess." The game in Europe since that time has been almost the same as is played today. The current rules were finalized in the early 19th century, except for the exact conditions for a draw.

The most popular piece design, the "Staunton" set, was created by Nathaniel Cook in 1849, endorsed by Howard Staunton, a leading player of the time, and officially adopted by Fédération Internationale des Échecs (FIDE) in 1924.

Chess's international governing body is FIDE, which has presided over the world championship matches for decades. See World Chess Championship for details and a more in-depth history. Most countries of the world have a national chess organization as well. Although chess is not an Olympic sport, it has its own Olympiad, held every two years as a team event.

[edit] Notation Until the 1970s, at least in English-speaking countries, chess games were recorded and published using descriptive chess notation. This has been supplanted by the more compact algebraic chess notation. Several notations have emerged, based upon algebraic chess notation, for recording chess games in a format suitable for computer processing. Of these, Portable Game Notation (PGN) is the most common. Apart from recording games, there is also a notation Forsyth-Edwards Notation for recording specific positions. This is useful for adjourning a game to resume later or for conveying chess problem positions without a diagram.

[edit] Computer chess Main article: Computer chess Once solely the province of the human mind, chess is now played by both humans and machines. At first considered only a curiosity, the best chess playing programs - like Shredder, Fritz etc. - have eventually become stronger than the best humans, especially in blitz, even when running on a normal computer.

Garry Kasparov, then ranked number one in the world, played a six-game match against IBM's chess computer Deep Blue in February 1996. Deep Blue shocked the world by winning the first game in Deep Blue - Kasparov, 1996, Game 1, but Kasparov convincingly won the match by winning three games and drawing two.

The six-game rematch in May 1997 was won by the machine (informally dubbed Deeper Blue) which was subsequently retired by IBM. In October 2002, Vladimir Kramnik drew in an eight-game match with the computer program Deep Fritz. In 2003, Kasparov drew both a six-game match with the computer program Deep Junior in February, and a four-game match against X3D Fritz in November.

The chess machine Hydra is the intellectual descendant of Deep Blue; and appears to be somewhat stronger than Deep Blue was. Certainly it is very much comparable in terms of positions analysed per second. Given the relative ease with which it beats the other programs, and the humans it has met, Hydra may be expected to beat any unaided human player in match play. In June 2005, Hydra scored a decisive victory over the then 7th ranked GM Michael Adams winning five games and drawing one game in a six game match.

Kasparov's loss to Deep Blue has inspired the creation of chess variants in which human intelligence can still overpower computer calculation. In particular Arimaa, which is played upon a standard 8×8 chessboard, is a game at which humans can beat the best efforts of programmers so far, even at fast time controls.

[edit] More information Rules of chess Equipment: Chessboard, Chess pieces, Game clock Movement of the pieces: Bishop, King, Knight, Pawn, Queen, Rook, Castling Demonstration (sample) chess game explains chess through a simple demonstration Chess game stages: opening, middlegame, endgame Chess strategy and tactics Tactical elements: Fork, Pin, Skewer, Discovered attack, Zwischenzug, Undermining, Overloading, Interference Middle games: Hypermodernism Chess terminology Chess problems and puzzles Chess variants - chess with different rules, board or pieces; historical or national chess-like games. Ways to play chess: Correspondence chess, Blitz chess, Bullet chess, Chess handicap, Simultaneous chess, Blindfold chess, Human chess Internet servers to play chess: Internet Chess Club, FICS, InstantChess.com, ChessWorld.net, BrainKing.com ELO rating system Administrative bodies: FIDE British Chess Federation United States Chess Federation Chess symbols in Unicode Chess and mathematics Chess as mental training Chess-related deaths List of chess players List of chess topics List of national chess championships [edit] Famous chess games Bowdler - Conway, London, 1788, the first example of the famous double rook sacrifice The immortal game between Adolf Anderssen and Lionel Kieseritzky (1851) The evergreen game between Adolf Anderssen and Jean Dufresne (1852) The opera game between Paul Morphy and two allies, the Duke of Brunswick and Count Isouard (1858) Lasker - Bauer, Amsterdam, 1889, the first example of the famous double bishop sacrifice The Game of the Century between Bobby Fischer and Donald Byrne (1956) Match of the Century between Bobby Fischer and Boris Spassky, 1972. Deep Blue - Kasparov, 1996, Game 1, the first game where a chess-playing computer defeated a reigning world champion using normal time controls (1996) Deep Blue - Kasparov, 1997, Game 6, the last game of the 1997 rematch, which Deep Blue won, making it the first computer to defeat a world champion in a match over several games. Kasparov versus The World, in which the reigning world champion played, via the Internet, against the entire rest of the world in consultation (1999) Kasparov - Topalov, Wijk aan Zee, 1999, rook sacrifice with a 15+ moves forced sacrificial combination, one of the most commented chess games ever, huge press coverage. [edit] History of chess Timeline of chess World Chess Championship Greatest chess player of all time Origins of chess Chess in early literature Early arabic chess literature Cox-Forbes theory Chess in Europe Chess Olympiad World records in chess [edit] World chess champions Main article: World Chess Championship Unofficial but widely recognized as Champions (pre-championship era):

Philidor Howard Staunton Adolf Anderssen Paul Morphy Official Champions:

Wilhelm Steinitz Emanuel Lasker José Raúl Capablanca Alexander Alekhine Max Euwe Mikhail Botvinnik Vassily Smyslov Mikhail Tal Tigran Petrosian Boris Spassky Robert Fischer Anatoly Karpov Garry Kasparov Unofficial but widely accepted as current World Champion:

Vladimir Kramnik FIDE World Champions after Garry Kasparov:

Alexander Khalifman Vishwanathan Anand Ruslan Ponomariov Rustam Kasimdzhanov [edit] Chess literature Chess columns in newspapers Chess libraries Collections of Chess Games Opening Manuals [edit] Chess in the arts and literature Through the Looking-Glass Searching For Bobby Fischer Danse Macabre The Luzhin Defence The Royal Game by Stefan Zweig. Chess and music Checkmate, a ballet by the composer Arthur Bliss. The Lewis chessmen also inspired Noggin the Nog. Harry Potter and the Philosophers Stone Knight Moves The Seventh Seal 2001: A Space Odyssey The Eight (novel, author: Katherine Neville (1998) The Flanders Panel by Arturo Perez-Reverte The Tower Struck By Lightning by Fernando Arrabal Fresh film (1994)

[edit] References ^ Mark Weeks's guide to chess at About.com Tarrasch, Siegbert (1994) The Game of Chess. Algebraic Edition, Hays Publishing. ISBN 1880673940 Wolff, Patrick (1991) The Complete Idiot's Guide to Chess, 3rd Edition, Alpha Books. ISBN 1592573169 Hooper, David and Kenneth Whyld (1992) The Oxford Companion to Chess, 2nd Edition, Oxford University Press. ISBN 0198661649 Reprint: (1996) ISBN 0192800493 [edit] External links Find more information on Chess by searching one of Wikipedia's sister projects:

    Wiktionary (a free dictionary)
    Wikibooks (free textbooks)
    Wikiquote (quotations)
    Wikisource (a free library)
    Commons (images and media)
    Wikinews (news stories)

[edit] General Opening Theory in the Chess Wikibook Official FIDE Website Official FIDE rules Official ECU Website Chessbase News British Chess Magazine Solve interactive chess problems linkcollection to free downloadable chessgames Free Online chess(turn based) Free Online chess (turn based) Online chess database and community Chess.FM - Annotated Grandmaster games and tutorials The Chess Variants Pages Chess curiosities by Tim Krabbé Bill Wall's Chess Page Ed's Ever-Growing Chess Page - essays, problems, cartoons, limericks, games, photos, puzzles, etc. WikiTeX chess - Supports editing chess games directly in Wiki articles. Play chess online instantly Play chess online Chess Webmaster Tools International Computer Games Association GameKnot online chess - one of the largest turn-based online chess communities Play Online Free Chess game - The Only Free Online Chess Game and Download site. Art of Chess Pitt Chess Archives http://www.accoonachess.com/ get the latest on chess news and also play the chess A.I. which learns from every game it plays! How To Play Chess. For Beginners and Parents. [edit] Games for download. Mostly in SCID,PGN, or CBF.

http://www.chesslive.de/ Online for games filtered by year, player, opening, etc.. http://www.chesslab.com Search by opening, player, results, position etc. http://www.notzai.com/notzai/regence/regence.shtml Games categorized by ECO codes. (French) http://www.chesscenter.com/twic/twic.html The Week in Chess. Find the latest Games. http://www.chesslib.no/ A Chessbase opening book. ftp://ftp.cis.uab.edu/pub/hyatt/ The resources used by Crafty. http://www.iccf.com/ The International Correspondance Chess Federation's Game Archive. [edit] Free chess software: Programs/Engines/Databases/Utilities Link collection to chess programs Chessopolis: Computer Chess Winboard ChessBase Light Aaron's Chess Engines FAQ [edit] Organizations The International Correspondence Chess Federation U.S. Chess Federation Swedish Chess Computer Federation (Also a collection of games)

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