Chess
_(cropped).jpg) Chess is a board game for two players. It is an abstract strategy game that involves no hidden information and no elements of chance. It is played on a square board consisting of 64 squares arranged in an 8×8 grid. The players, referred to as "White" and "Black", each control sixteen pieces: one king, one queen, two rooks, two bishops, two knights, and eight pawns, with each type of piece having a different pattern of movement. An enemy piece may be captured (removed from the board) by moving one's own piece onto the square it occupies. The object of the game is to "checkmate" (threaten with inescapable capture) the enemy king. There are also several ways a game can end in a draw. The recorded history of chess goes back to at least the emergence of chaturanga—also thought to be an ancestor to similar games like Janggi, xiangqi and shogi—in seventh-century India. After its introduction in Persia, it spread to the Arab world and then to Europe. The modern rules of chess emerged in Europe at the end of the 15th century, with standardization and universal acceptance by the end of the 19th century. Today, chess is one of the world's most popular games, with millions of players worldwide. Organized chess arose in the 19th century. Chess competition today is governed internationally by FIDE (Fédération Internationale des Échecs), the International Chess Federation. The first universally recognized World Chess Champion, Wilhelm Steinitz, claimed his title in 1886; Gukesh Dommaraju is the current World Champion, having won the title in 2024. A huge body of chess theory has developed since the game's inception. Aspects of art are found in chess composition, and chess in its turn influenced Western culture and the arts, and has connections with other fields such as mathematics, computer science, and psychology. One of the goals of early computer scientists was to create a chess-playing machine. In 1997, Deep Blue became the first computer to beat a reigning World Champion in a match when it defeated Garry Kasparov. Today's chess engines are significantly stronger than the best human players and have deeply influenced the development of chess theory; however, chess is not a solved game. RulesThe rules of chess are published by FIDE (Fédération Internationale des Échecs; "International Chess Federation"), chess's world governing body, in its Handbook.[2] Rules published by national governing bodies, or by unaffiliated chess organizations, commercial publishers, etc., may differ in some details. FIDE's rules were most recently revised in 2023. Setup Chess sets come in a wide variety of styles. The Staunton pattern is the most common, and is usually required for competition.[3] Chess sets come with pieces in two colors, referred to as white and black, regardless of their actual color; the players controlling the color sets are referred to as White and Black, respectively. Each set comes with at least the following 16 pieces in both colors: one king, one queen, two rooks, two bishops, two knights, and eight pawns.[2] The game is played on a square board of eight rows (called ranks) and eight columns (called files). Although it does not affect gameplay, by convention the 64 squares alternate in color and are referred to as light and dark squares.[2]
Initial position: first row: rook, knight, bishop, queen, king, bishop, knight, rook; second row: pawns
To start the game, White's pieces are placed on the first rank in the following order, from left to right: rook, knight, bishop, queen, king, bishop, knight, rook. Pawns are placed on each square of the second rank. Black's position mirrors White's, with equivalent pieces on every file.[2] The board is oriented so that the right-hand corner nearest each player is a light square; as a result the white queen always starts on a light square, while the black queen starts on a dark square. This may be remembered by the phrases "white on the right" and "queen on her color".[4] In competition, the piece colors are allocated to players by the organizers. In informal games, colors may be decided either by mutual agreement, or randomly, for example by a coin toss, or by one player concealing a white pawn in one hand and a black pawn in the other and having the opponent choose.[citation needed] MovementWhite moves first, after which players alternate turns. One piece is moved per turn (except when castling, during which two pieces are moved). In the diagrams, dots mark the squares to which each type of piece can move if unoccupied by friendly pieces and there are no intervening piece(s) of either color (except the knight, which leaps over any intervening pieces). With the sole exception of en passant, a piece captures an enemy piece by moving to the square it occupies, removing it from play and taking its place. The pawn is the only piece that does not capture the way it moves, and it is the only piece that moves and captures in only one direction (forwards from the player's perspective). A piece is said to control empty squares on which it could capture, attack squares with enemy pieces it could capture, and defend squares with pieces of the same color on which it could recapture. Moving is compulsory; a player may not skip a turn, even when having to move is detrimental.
Check and checkmate
When a king is under immediate attack, it is in check. A move in response to a check is legal only if it results in a position in which the king is no longer in check. There are three ways to counter a check:
The object of the game is to checkmate the opponent; this occurs when the opponent's king is in check, and there is no legal way to get it out of check. In casual games, it is common to announce "check" when putting the opponent's king in check, but this is not required by the rules of chess and is usually not done in tournaments.[5] Castling Kings can castle once per game. Castling consists of moving the king two squares toward either rook of the same color, and then placing the rook on the square that the king crossed. Castling is possible only if the following conditions are met:[2]
Castling is still permitted if the rook is under attack, or if the rook crosses an attacked square. Special pawn moves
 Pawns have two special moves:
End of the gameWinA game can be won in the following ways:
DrawThere are several ways a game can end in a draw:
Time controlTypical digital and analog chess clocks In competition, chess games are played with a time control. Time controls are generally divided into categories based on the amount of time given to each player, which range from classical time controls, which allot about 2 hours or more to each player and which can take upwards of seven hours (even longer if adjournments are permitted), to bullet chess, in which players receive less than three minutes each. Between these are rapid chess (ten to sixty minutes per player), popular in amateur tournaments, and blitz chess (three to ten minutes), popular online. Non-classical chess is sometimes referred to as fast chess. Time is controlled using a chess clock with two displays, one for each player's remaining time. Analog chess clocks have been largely replaced by digital clocks, which allow for time controls with increments. There are some aspects unique to online chess. A premove allows a player to submit a move on the opponent's turn, which gets played automatically if possible using little to no time. Premoves, alongside the relative ease of digital inputs, make faster time controls feasible online. Time controls are also enforced in correspondence chess competitions. A typical time control is 50 days for every 10 moves. Time is usually allotted per move in online correspondence chess. NotationHistorically, many different notation systems have been used to record chess moves; the standard system today is short-form algebraic notation.[10] In this system, files are labeled a through h and ranks are labeled 1 through 8. Squares are identified by the file and rank they occur on; g3 is the square on the g file and the third rank. In English, the piece notations are: K (king), Q (queen), R (rook), B (bishop), and N (knight; N is used to avoid confusion with king). Different initials are used in other languages. Moves are recorded as follows:
 For example, Qg5 means "queen moves to g5". No letter initial is used for pawns, so e4 means "pawn moves to e4". When multiple moves could be rendered the same way, the file or rank from which the piece moved is added to resolve ambiguity (e.g. Ngf3 means "knight from the g-file moves to the square f3"; R1e2 means "rook on the first rank moves to e2"). If a move may be disambiguated by rank or file, it is done by file, and in the rare case that both are needed, squares are listed normally (e.g. Qh4xe1). If the move is a capture, "x" is usually inserted before the destination square, thus Bxf3 means "bishop captures on f3". When a pawn makes a capture, the file from which the pawn departed is often listed even when no disambiguation is necessary; for example, exd5. If a pawn moves to its last rank, achieving promotion, the piece chosen is indicated after the move (for example, e1=Q or e1Q). Castling is indicated by the special notations 0-0 for kingside castling and 0-0-0 for queenside castling. A move that places the opponent's king in check usually has the notation "+" suffixed. Checkmate can be indicated by suffixing "#". At the end of the game, "1–0" means White won, "0–1" means Black won, and "½–½" indicates a draw.[2] Chess moves can be annotated with punctuation marks and other symbols. For example: "!" indicates a good move; "!!" an excellent move; "?" a mistake; "??" a blunder; "!?" an interesting move that may not be best; or "?!" a dubious move not easily refuted.[11]  Moves are written as white/black pairs, preceded by the move number and a period. Individual white moves are also recorded this way, while black moves are rendered with an ellipsis after the move number. For example, one variation of a simple trap known as the Scholar's mate (see animated diagram) can be recorded: The move 3... Nf6?? is recorded as a blunder, as it allows 4. Qxf7# checkmate. Games or sequences may be recorded in Portable Game Notation (PGN), a text-based file format with support for annotative symbols, commentary, and background information, such as player names. It is based on short form English algebraic notation incorporating markup language. PGN transcripts, stored digitally as PGN (.pgn) files can be processed by most chess software and are easily readable by humans. Variants of algebraic notation include long algebraic, in which both the departure and destination square are indicated; abbreviated algebraic, in which capture signs, check signs, and ranks of pawn captures may be omitted; and figurine algebraic notation, used in chess books and magazines, which uses graphic symbols instead of initials to indicate pieces for readability regardless of language. Until about 1980, the majority of English language chess publications used descriptive notation, in which files are identified by the initial letter of the piece that occupies the first rank at the beginning of the game. In descriptive notation, the common opening move 1.e4 is rendered as "1.P-K4" ("pawn to king four"). Another system is ICCF numeric notation, recognized by the International Correspondence Chess Federation though its use is in decline. In tournament games, players are normally required to keep a score (written record of the game). This is a requirement in all FIDE-sanctioned games played at classical time controls.[2] For this purpose, only algebraic notation is recognized by FIDE, though variants such as long algebraic are acceptable; game scores recorded in a different notation system may not be used as evidence in the event of a dispute. GameplayTheoryChess has an extensive literature. In 1913, the chess historian H.J.R. Murray estimated the total number of books, magazines, and chess columns in newspapers to be about 5,000.[12] B.H. Wood estimated the number, as of 1949, to be about 20,000.[13] David Hooper and Kenneth Whyld write that, "Since then there has been a steady increase year by year of the number of new chess publications. No one knows how many have been printed."[13] Significant public chess libraries include the John G. White Chess and Checkers Collection at Cleveland Public Library, with over 32,000 chess books and over 6,000 bound volumes of chess periodicals;[14] and the Chess & Draughts collection at the National Library of the Netherlands, with about 30,000 books.[15] Strategy
Chess strategy is concerned with the evaluation of chess positions and with setting up goals and long-term plans for future play. During the evaluation, players must take into account numerous factors such as the value of the pieces on the board, control of the center and centralization, the pawn structure, king safety, and the control of key squares or groups of squares (for example, diagonals, open files, and dark or light squares). The most basic step in evaluating a position is to count the total value of pieces of both sides.[17] The point values used for this purpose are based on experience; usually, pawns are considered worth one point, knights and bishops about three points each, rooks about five points (the value difference between a rook and a bishop or knight being known as the exchange), and queens about nine points. The king is more valuable than all of the other pieces combined, since its checkmate loses the game, but is still capable as a fighting piece; in the endgame, the king is generally more powerful than a bishop or knight but less powerful than a rook.[18] These basic values are then modified by other factors like position of the piece (e.g. advanced pawns are usually more valuable than those on their initial squares), coordination between pieces (e.g. a pair of bishops usually coordinate better than a bishop and a knight), or the type of position (e.g. knights are generally better in closed positions with many pawns while bishops are more powerful in open positions).[19] Another important factor in the evaluation of chess positions is pawn structure (sometimes known as the pawn skeleton): the configuration of pawns on the chessboard.[20] Since pawns are the least mobile of the pieces, pawn structure is relatively static and largely determines the strategic nature of the position. Weaknesses in pawn structure include isolated, doubled, or backward pawns and holes; once created, they are often permanent. Care must therefore be taken to avoid these weaknesses unless they are compensated by another valuable asset (for example, by the possibility of developing an attack).[21] TacticsIn chess, tactics generally refer to short-term maneuvers – so short-term that they can be calculated in advance by a human player. The possible depth of calculation depends on the player's ability. In quiet positions with many possibilities on both sides, a deep calculation is more difficult and may not be practical, while in positions with a limited number of forced variations, strong players can calculate long sequences of moves. Theoreticians describe many elementary tactical methods and typical maneuvers, for example: pins, forks, skewers, batteries, discovered attacks (especially discovered checks), zwischenzugs, deflections, decoys, sacrifices, underminings, overloadings, and interferences.[22] Simple one-move or two-move tactical actions – threats, exchanges of material, and double attacks – can be combined into longer sequences of tactical maneuvers that are often forced from the point of view of one or both players. A forced variation that involves a sacrifice and usually results in a tangible gain is called a combination.[23] Brilliant combinations – such as those in the Immortal Game – are considered beautiful and are admired by chess lovers. A common type of chess exercise, aimed at developing players' tactical skills, is a position where a combination is available and the challenge is to find it. Such positions are usually taken from actual games or from analysis of actual games. Solutions usually result in checkmate, decisive advantage, or successful defense. Tactical exercises are commonly found in instructional books, chess magazines, newspaper chess columns, and internet chess sites.[24] PhasesChess theory divides chess games into three phases with different sets of strategies: the opening, the middlegame, and lastly the endgame. There is no universally accepted way to delineate the three phases of the game; the middlegame is typically considered to have begun after 10–20 moves, and the endgame when only a few pieces remain. Opening
The Najdorf Variation (5...a6), a popular line of the Sicilian Defense (1...c5), itself a response to the King's Pawn Game (1.e4)
Competitive players typically learn, memorize, and play well-documented sequences of opening moves. The most common starting moves for White are 1.e4 and 1.d4, which usually lead to substantially different types of positions, and Black has multiple viable responses to both. Sequences of opening moves are referred to as openings and are catalogued in reference works, such as the Encyclopaedia of Chess Openings. There are thousands of openings, though only a small fraction of them are commonly played; variations of openings may also be given names. Openings vary widely in character from quiet positional play (for example, the Réti Opening) to sharp aggressive play (like the Latvian Gambit). In some opening lines, the exact sequence considered best for both sides has been worked out to more than 30 moves.[25] The fundamental strategic aims of most openings are similar:[26]
Most players and theoreticians consider that White, by virtue of the initiative granted from moving first, begins the game with a small advantage.[27] Black usually strives to neutralize White's advantage and achieve equality, or to develop dynamic counterplay in an unbalanced position. MiddlegameThe middlegame is the part of the game that starts after the opening. Because the opening theory has ended, players have to form plans based on the features of the position, and at the same time take into account the tactical possibilities of the position.[28] The middlegame is the phase in which most combinations occur. Combinations are a series of tactical moves executed to achieve some gain. Middlegame combinations are often connected with an attack against the opponent's king. Some typical patterns have their own names; for example, the Boden's Mate or the Lasker–Bauer combination.[29] Specific plans or strategic themes will often arise from particular groups of openings that result in a specific type of pawn structure. An example is the minority attack, which is the attack of queenside pawns against an opponent who has more pawns on the queenside. The study of openings is therefore connected to the preparation of plans that are typical of the resulting middlegames.[30] Another important strategic question in the middlegame is whether and how to reduce material and transition into an endgame (i.e. simplify). Minor material advantages can generally be transformed into victory only in an endgame, and therefore the stronger side must choose an appropriate way to achieve an ending. Not every reduction of material is good for this purpose; for example, if one side keeps a light-squared bishop and the opponent has a dark-squared one, the transformation into a bishops and pawns ending is usually advantageous for the weaker side only, because an endgame with bishops on opposite colors is likely to be a draw, even with an advantage of a pawn, or sometimes even with a two-pawn advantage.[31] EndgameExample of zugzwang
The side to move is disadvantaged.
The endgame (also end game or ending) is the stage of the game when there are few pieces left on the board. There are three main strategic differences between earlier stages of the game and the endgame:[32]
Endgames can be classified according to the type of pieces remaining on the board. Basic checkmates are positions in which one side has only a king and the other side has one or two pieces and can checkmate the opposing king, with the pieces working together with their king. For example, king and pawn endgames involve only kings and pawns on one or both sides, and the task of the stronger side is to promote one of the pawns. Other more complicated endings are classified according to pieces on the board other than kings, such as "rook and pawn versus rook" endgames. Problems and studies
White to move and draw This endgame study is solved by advancing the white king diagonally, simultaneously stopping the black pawn and supporting the white pawn on its way to queen.[33]
Chess problems (also called chess compositions) are composed positions, usually created for artistic effect rather than practical application. The creator is known as a chess composer.[34] There are many types of chess problems, the most common being directmates, in which White is required to move and checkmate Black within a specified number of moves, usually two or three, against any defense. These are commonly referred to as "two-movers", "three-movers", or "more-movers". "Many-movers" (also known as "long-range problems") of over 100 moves have been composed, the current record standing at over 200; these usually require repetitions of the same manoeuvre in order to produce a repeated zugzwang and force detrimental pawn advances.[35][36] Directmates usually consist of positions unlikely to occur in an actual game, and are intended to illustrate a particular theme, usually requiring a surprising or counterintuitive key move. Themes associated with chess problems occasionally appear in actual games, when they are referred to as "problem-like" moves.[37] Other common types of problems include:
The above type of problems are usually considered orthodox, in the sense that the standard rules of chess are observed. Fairy chess problems, also called heterodox problems, involve altered rules, such as the use of unconventional pieces or boards, or stipulations that contradict the standard rules of chess such as reflexmates or seriesmovers. Studies are usually considered distinct from problems, although there is some overlap. In a study, the stipulation is that White to play must win or draw, without specifying any particular number of moves. The majority of studies are endgame positions, with varying degrees of realism or practical application.[38] Tournaments for composition and solving of chess problems and studies are organized by the World Federation for Chess Composition (WFCC), which works cooperatively with but independent of FIDE. The WFCC awards titles for composing and solving chess problems.[39] Chess in public spacesChess is often played in public spaces such as parks and town squares. Although the nature of these games is often casual, the chess hustling scene has seen growth in urban areas such as New York City.[40]
Organized competitionTournaments and matches Contemporary chess is an organized sport with structured international and national leagues, tournaments, and congresses. Thousands of chess tournaments, matches, and festivals are held around the world every year catering to players of all levels. Tournaments with a small number of players may use the round-robin format, in which every player plays one game against every other player. For a large number of players, the Swiss system may be used, in which each player is paired against an opponent who has the same (or as similar as possible) score in each round. In either case, a player's score is usually calculated as 1 point for each game won and one-half point for each game drawn. Variations such as "football scoring" (3 points for a win, 1 point for a draw) may be used by tournament organizers, but ratings are always calculated on the basis of standard scoring. A player's score may be reported as total score out of games played (e.g. 5½/8), points for versus points against (e.g. 5½–2½), or by number of wins, losses and draws (e.g. +4−1=3). The term "match" refers not to an individual game, but to either a series of games between two players, or a team competition in which each player of one team plays one game against a player of the other team. GovernanceChess's international governing body is usually known by its French acronym FIDE (pronounced FEE-day) (French: Fédération Internationale des Échecs), or International Chess Federation. FIDE's membership consists of the national chess organizations of over 180 countries; there are also several associate members, including various supra-national organizations, the International Braille Chess Association (IBCA), International Chess Committee of the Deaf (ICCD), and the International Physically Disabled Chess Association (IPCA).[41] FIDE is recognized as a sports governing body by the International Olympic Committee,[42] but chess has never been part of the Olympic Games.  FIDE's most visible activity is organizing the World Chess Championship, a role it assumed in 1948. The current World Champion is Gukesh Dommaraju of India.[43][44] The reigning Women's World Champion is Ju Wenjun from China.[45] Other competitions for individuals include the World Junior Chess Championship, the European Individual Chess Championship, the tournaments for the World Championship qualification cycle, and the various national championships. Invitation-only tournaments regularly attract the world's strongest players. Examples include Spain's Linares event, Monte Carlo's Melody Amber tournament, the Dortmund Sparkassen meeting, Sofia's M-tel Masters, and Wijk aan Zee's Tata Steel tournament. Regular team chess events include the Chess Olympiad and the European Team Chess Championship. The World Chess Solving Championship and World Correspondence Chess Championship include both team and individual events. These are held independently of FIDE by, respectively, the World Federation for Chess Composition (WFCC), and the International Correspondence Chess Federation (ICCF). Titles and rankingsIn order to rank players, FIDE, ICCF, and most national chess organizations use the Elo rating system developed by Arpad Elo. An average club player has a rating of about 1500; the highest FIDE rating of all time, 2882, was achieved by Magnus Carlsen on the March 2014 FIDE rating list.[46] Players may be awarded lifetime titles by FIDE:[48]
The above titles are known as "open" titles, obtainable by both men and women. There are also separate women-only titles; Woman Grandmaster (WGM), Woman International Master (WIM), Woman FIDE Master (WFM) and Woman Candidate Master (WCM). These require a performance level approximately 200 rating points below their respective open titles, and their continued existence has sometimes been controversial.[citation needed] Beginning with Nona Gaprindashvili in 1978, a number of women have earned the open GM title: 40 as of July 2023[update].[note 2] FIDE also awards titles for arbiters and trainers.[49][50] International titles are also awarded to composers and solvers of chess problems and to correspondence chess players (by the International Correspondence Chess Federation). National chess organizations may also award titles. HistoryOrigins Texts referring to the origins of chess date from the beginning of the seventh century. Three are written in Pahlavi (Middle Persian)[53] and one, the Harshacharita, is in Sanskrit.[54] One of these texts, the Chatrang-namak, represents one of the earliest written accounts of chess. The narrator Bozorgmehr explains that Chatrang, "Chess" in Pahlavi, was introduced to Persia by 'Dewasarm, a great ruler of India' during the reign of Khosrow I:[55]
— Translation by Murray, 1913.[56]  The oldest known chess manual was in Arabic and dates to about 840, written by al-Adli ar-Rumi (800–870), a renowned Arab chess player, titled Kitab ash-shatranj (The Book of Chess). This is a lost manuscript, but is referenced in later works.[57] Here also, al-Adli attributes the origins of Persian chess to India, along with the eighth-century collection of fables Kalīla wa-Dimna.[58] By the 20th century, a substantial consensus[59][60] developed regarding chess's origins in northwest India in the early seventh century.[61] More recently, this consensus has been the subject of further scrutiny.[62] The early forms of chess in India were known as chaturaṅga (Sanskrit: चतुरङ्ग), literally "four divisions" [of the military] – infantry, cavalry, elephants, and chariotry – represented by pieces that would later evolve into the modern pawn, knight, bishop, and rook, respectively. Chaturanga was played on an 8×8 uncheckered board, called ashtāpada.[63] Thence it spread eastward and westward along the Silk Road. The earliest evidence of chess is found in nearby Sasanian Persia around 600 A.D., where the game came to be known by the name chatrang (Persian: چترنگ).[64] Chatrang was taken up by the Muslim world after the Islamic conquest of Persia (633–51), where it was then named shatranj (Arabic: شطرنج; Persian: شترنج), with the pieces largely retaining their Persian names. In Spanish, "shatranj" was rendered as ajedrez ("al-shatranj"), in Portuguese as xadrez, and in Greek as ζατρίκιον (zatrikion, which comes directly from the Persian chatrang),[65] but in the rest of Europe it was replaced by versions of the Persian shāh ("king"), from which the English words "check" and "chess" descend.[note 3] The word "checkmate" is derived from the Persian shāh māt ("the king is dead").[66]  Xiangqi is the form of chess best known in China. The eastern migration of chess, into China and Southeast Asia, has even less documentation than its migration west, making it largely conjectured. The word xiàngqí (象棋) was used in China to refer to a game from 569 A.D. at the latest, but it has not been proven that this game was directly related to chess.[67][68] The first reference to Chinese chess appears in a book entitled Xuánguaì Lù (玄怪錄; "Record of the Mysterious and Strange"), dating to about 800. A minority view holds that Western chess arose from xiàngqí or one of its predecessors.[69][70] Chess historians Jean-Louis Cazaux and Rick Knowlton contend that xiangqi's intrinsic characteristics make it easier to construct an evolutionary path from China to India/Persia than the opposite direction.[71] The oldest archaeological chess artifacts – ivory pieces – were excavated in ancient Afrasiab, today's Samarkand, in Uzbekistan, Central Asia, and date to about 760, with some of them possibly being older. Remarkably, almost all findings of the oldest pieces come from along the Silk Road, from the former regions of the Tarim Basin (today's Xinjiang in China), Transoxiana, Sogdiana, Bactria, Gandhara, to Iran on one end and to India through Kashmir on the other.[72]  The game reached Western Europe and Russia via at least three routes, the earliest being in the ninth century. By the year 1000, it had spread throughout both the Muslim Iberia and Latin Europe.[74] A Latin poem called Versus de scachis ("Verses on Chess") dated to the late 10th century, has been preserved at Einsiedeln Abbey in Switzerland. 1200–1700: Origins of the modern gameThe game of chess was then played and known in all European countries. A famous 13th-century Spanish manuscript covering chess, backgammon, and dice is known as the Libro de los juegos, which is the earliest European treatise on chess as well as being the oldest document on European tables games.[75] The rules were fundamentally similar to those of the Arabic shatranj. The differences were mostly in the use of a checkered board instead of a plain monochrome board used by Arabs and the habit of allowing some or all pawns to make an initial double step. In some regions, the queen, which had replaced the wazir, or the king could also make an initial two-square leap under some conditions.[76]  Around 1200, the rules of shatranj started to be modified in Europe, culminating, several major changes later, in the emergence of modern chess practically as it is known today.[77] A major change was the modern piece movement rules, which began to appear in intellectual circles in Valencia, Spain, around 1475,[note 4] which established the foundations and brought it very close to current chess. These new rules then were quickly adopted in Italy and Southern France before diffusing into the rest of Europe.[80][81] Pawns gained the ability to advance two squares on their first move, while bishops and queens acquired their modern movement powers. The queen replaced the earlier vizier chess piece toward the end of the 10th century and by the 15th century had become the most powerful piece;[82] in light of that, modern chess was often referred to at the time as "Queen's Chess" or "Mad Queen Chess".[83] Castling, derived from the "king's leap", usually in combination with a pawn or rook move to bring the king to safety, was introduced. These new rules quickly spread throughout Western Europe. Writings about chess theory began to appear in the late 15th century. An anonymous treatise on chess of 1490 with the first part containing some openings and the second 30 endgames is deposited in the library of the University of Göttingen.[84] The book El Libro dels jochs partitis dels schachs en nombre de 100 was written by Francesc Vicent in Segorbe in 1495, but no copy of this work has survived.[84] The Repetición de Amores y Arte de Ajedrez (Repetition of Love and the Art of Playing Chess) by Spanish churchman Luis Ramírez de Lucena was published in Salamanca in 1497.[81] Lucena and later masters like Portuguese Pedro Damiano, Italians Giovanni Leonardo Di Bona, Giulio Cesare Polerio and Gioachino Greco, and Spanish bishop Ruy López de Segura developed elements of opening theory and started to analyze simple endgames. 1700–1873: Romantic era In the 18th century, the center of European chess life moved from Southern Europe to mainland France.[citation needed] The two most important French masters were François-André Danican Philidor, a musician by profession, who discovered the importance of pawns for chess strategy, and later Louis-Charles Mahé de La Bourdonnais, who won a famous series of matches against Irish master Alexander McDonnell in 1834.[85] Centers of chess activity in this period were coffee houses in major European cities like Café de la Régence in Paris and Simpson's Divan in London.[86][87] At the same time, the Romantic intellectual movement had had a far-reaching impact on chess, with aesthetics and tactical beauty being held in higher regard than objective soundness and strategic planning. As a result, virtually all games began with the Open Game, and it was considered unsportsmanlike to decline gambits that invited tactical play such as the King's Gambit and the Evans Gambit.[88] This chess philosophy is known as Romantic chess, and its sharp, tactical style of play was predominant until the late 19th century.[89] The rules concerning stalemate were finalized in the early 19th century. Also in the 19th century, the convention that White moves first was established (formerly either White or Black could move first). Finally, the rules around castling and en passant captures were standardized – variations in these rules persisted in Italy until the late 19th century. The resulting standard game is sometimes referred to as Western chess[90] or international chess,[91] particularly in Asia where other games of the chess family such as xiangqi are prevalent. Since the 19th century, the only rule changes, such as the establishment of the correct procedure for claiming a draw by repetition, have been technical in nature.  As the 19th century progressed, chess organization developed quickly. Many chess clubs, chess books, and chess journals appeared. There were correspondence matches between cities; for example, the London Chess Club played against the Edinburgh Chess Club in 1824.[92] Chess problems became a regular part of 19th-century newspapers; Bernhard Horwitz, Josef Kling, and Samuel Loyd composed some of the most influential problems. In 1843, von der Lasa published his and Bilguer's Handbuch des Schachspiels (Handbook of Chess), the first comprehensive manual of chess theory. The first modern chess tournament was organized by Howard Staunton, a leading English chess player, and was held in London in 1851. It was won by the German Adolf Anderssen, who was hailed as the leading chess master. His brilliant, energetic attacking style was typical for the time.[93][94] Sparkling games like Anderssen's Immortal Game and Evergreen Game or Morphy's "Opera Game" were regarded as the highest possible summit of the art of chess.[95] Deeper insight into the nature of chess came with the American Paul Morphy, an extraordinary chess prodigy. Morphy won against all important competitors (except Staunton, who refused to play), including Anderssen, during his short chess career between 1857 and 1863. Morphy's success stemmed from a combination of brilliant attacks and sound strategy; he intuitively knew how to prepare attacks.[96] 1873–1945: Birth of a sport Rubinstein vs. Nimzowitsch, 1925
Nimzowitsch later commented: "Each side castles now with a clear conscience, for not even the most hypermodern pair of masters can produce more than four fianchettoed Bishops!"[97]
Prague-born Wilhelm Steinitz laid the foundations for a scientific approach to the game, the art of breaking a position down into components[98] and preparing correct plans.[99] In addition to his theoretical achievements, Steinitz founded an important tradition: his triumph over the leading German master Johannes Zukertort in 1886 is regarded as the first official World Chess Championship. This win marked a stylistic transition at the highest levels of chess from an attacking, tactical style predominant in the Romantic era to a more positional, strategic style introduced to the chess world by Steinitz. Steinitz lost his crown in 1894 to a much younger player, the German mathematician Emanuel Lasker, who maintained this title for 27 years, the longest tenure of any world champion.[100] After the end of the 19th century, the number of master tournaments and matches held annually quickly grew. The first Olympiad was held in Paris in 1924, and FIDE was founded initially for the purpose of organizing that event. In 1927, the Women's World Chess Championship was established; the first to hold the title was Czech-English master Vera Menchik.[101] A prodigy from Cuba, | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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