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Topic:
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Description:
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Topic:
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Description: The
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Topic: Knight Movement
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Description: The knight moves in an L-shape: two squares in one direction and then one square perpendicular, or one square in one direction and then two squares perpendicular.
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Topic: Castling
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Description: Castling is a move that involves the king moving two squares towards a rook on the player's first rank, then the rook moving to the square over which the king crossed.
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Topic: Check
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Description: A check is a situation where a king is under threat of being captured on the next move.
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Topic: Checkmate
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Description: A game of chess is won by checkmating your opponent's king, which means the king is in a position to be captured and cannot escape.
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Topic: Stalemate
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Description: A stalemate occurs when the player whose turn it is to move has no legal move and their king is not in check. It results in a draw.
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Topic: En Passant
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Description: En passant is a special pawn capture that can occur if a pawn moves two squares forward from its starting position and lands beside an opponent's pawn.
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Topic: Chess Clock
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Description: A chess clock is used to track the total time each player takes for their moves. If a player's time runs out, they lose the game.
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Topic: Fork
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Description: A fork is a tactic where a single piece attacks two or more of the opponent's pieces at the same time.
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Topic: Bishop Movement
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Description: A bishop moves diagonally any number of squares, but cannot jump over other pieces.
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Topic: Pin
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Description: A pin occurs when a piece cannot move without exposing a more valuable piece, like the king or queen, to attack.
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Topic: Discovered Check
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Description: A discovered check happens when a piece moves, revealing an attack on the opponent's king by another piece.
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Topic: Rook Movement
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Description: A rook moves any number of squares along a row or column.
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Topic: Gambit
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Description: A gambit is a chess opening in which a player sacrifices material, usually a pawn, with the hope of achieving a subsequent advantageous position.
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Topic: Fifty-Move Rule
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Description: The fifty-move rule allows a player to claim a draw if no pawn has been moved and no capture has been made in the last fifty moves by each player.
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Topic: Difference Between Check and Checkmate
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Description: Check is when the king is in danger but can still escape, whereas checkmate is when the king is in danger and cannot escape.
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Topic: Queen Movement
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Description: The queen can move any number of squares along a row, column, or diagonal.
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Topic: Perpetual Check
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Description: Perpetual check is a situation in which one player can check the opponent's king continuously, resulting in a draw if it occurs three times.
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Topic: Phases of a Chess Game
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Description: The three phases of a chess game are the opening, the middlegame, and the endgame.
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Main menu
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WikipediaThe Free Encyclopedia
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Search
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Create account
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Log in
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Personal tools
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Toggle the table of contents
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Chess
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Article
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Talk
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Read
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View source
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View history
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Tools
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Page semi-protected
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Listen to this article
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From Wikipedia, the free encyclopedia
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This article is about the Western board game. For other chess games or other uses, see Chess (disambiguation).
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Chess
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A selection of white and black chess pieces on a checkered surface.
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Part of a Staunton chess set
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Left to right: white king, black rook, black queen, white pawn, black knight, white bishop
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Years active c. 1475 to present[1] (predecessors c. 900 years earlier)
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Genres
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Board game
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Abstract strategy game
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Mind sport
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Players 2
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Chance None
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Skills Strategy, tactics
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Synonyms
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International chess
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Western chess
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Chess is a board game for two players. It is sometimes called international chess or Western chess to distinguish it from related games such as xiangqi (Chinese chess) and shogi (Japanese chess).
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Chess is an abstract strategy game that involves no hidden information and no elements of chance. It is played on a chessboard with 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. White moves first, followed by Black. The game is won by checkmating the opponent's king, i.e. threatening it with inescapable capture. There are several ways a game can end in a draw.
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The recorded history of chess goes back at least to the emergence of a similar game, chaturanga, in seventh-century India. The rules of chess as they are known today 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, and is played by millions of people worldwide.
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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; Ding Liren is the current World Champion.
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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 the 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.
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This article uses algebraic notation to describe chess moves.
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Rules
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Main article: Rules of chess
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The 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.
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Setup
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Setup at the start of a chess game
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Chess sets come in a wide variety of styles. The Staunton pattern is the most common, and is usually required for competition. Chess pieces are divided into two sets, usually light and dark colored, referred to as white and black, regardless of the actual color or design. The players of the sets are referred to as White and Black, respectively. Each set consists of sixteen pieces: one king, one queen, two rooks, two bishops, two knights, and eight pawns.
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The game is played on a square board of eight rows (called ranks) and eight columns (called files). By convention, the 64 squares alternate in color and are referred to as light and dark squares; common colors for chessboards are white and brown, or white and green.
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Initial position
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a b c d e f g h
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8
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a8 black rookb8 black knightc8 black bishopd8 black queene8 black kingf8 black bishopg8 black knighth8 black rooka7 black pawnb7 black pawnc7 black pawnd7 black pawne7 black pawnf7 black pawng7 black pawnh7 black pawna2 white pawnb2 white pawnc2 white pawnd2 white pawne2 white pawnf2 white pawng2 white pawnh2 white pawna1 white rookb1 white knightc1 white bishopd1 white queene1 white kingf1 white bishopg1 white knighth1 white rook
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8
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7 7
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6 6
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4 4
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3 3
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2 2
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1 1
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a b c d e f g h
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First row: rook, knight, bishop, queen, king, bishop, knight, rook. Second row: pawns.
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The pieces are set out as shown in the diagram and photo. Thus, on White's first rank, from left to right, the pieces are placed as follows: rook, knight, bishop, queen, king, bishop, knight, rook. Eight pawns are placed on the second rank. Black's position mirrors White's, with an equivalent piece on the same file. The board is placed with a light square at the right-hand corner nearest to each player. The correct position of the light square may be remembered by the phrase "light on right", while the correct positions of the king and queen may be remembered by the phrase "queen on her own color" (i.e. the white queen begins on a light square, and the black queen on a dark square).
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In competitive games, the piece colors are allocated to players by the organizers; in informal games, the colors are usually decided 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.
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Movement
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White moves first, after which players alternate turns, moving one piece per turn (except for castling, when two pieces are moved). A piece is moved to either an unoccupied square or one occupied by an opponent's piece, which is captured and removed from play. With the sole exception of en passant, all pieces capture by moving to the square that the opponent's piece occupies. Moving is compulsory; a player may not skip a turn, even when having to move is detrimental.
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Each piece has its own way of moving. In the diagrams, crosses mark the squares to which the piece can move if there are no intervening piece(s) of either color (except the knight, which leaps over any intervening pieces). All pieces except the pawn can capture an enemy piece if it is on a square to which they could move if the square were unoccupied. Pieces are generally not permitted to move through squares occupied by pieces of either color, except for the knight and during castling.
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Moves of the king
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a b c d e f g h
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e6 black crossf6 black crossg6 black crosse5 black crossf5 white kingg5 black crosse4 black crossf4 black crossg4 black cross
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8
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7 7
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6 6
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5 5
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4 4
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3 3
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2 2
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1 1
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a b c d e f g h
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Moves of a rook
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a b c d e f g h
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d8 black crossd7 black crossd6 black crossa5 black crossb5 black crossc5 black crossd5 white rooke5 black crossf5 black crossg5 black crossh5 black crossd4 black crossd3 black crossd2 black crossd1 black cross
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7 7
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4 4
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1 1
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a b c d e f g h
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Moves of a bishop
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h8 black crossa7 black crossg7 black crossb6 black crossf6 black crossc5 black crosse5 black crossd4 white bishopc3 black crosse3 black crossb2 black crossf2 black crossa1 black crossg1 black cross
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Moves of a queen
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d8 black crossh8 black crossa7 black crossd7 black crossg7 black crossb6 black crossd6 black crossf6 black crossc5 black crossd5 black crosse5 black crossa4 black crossb4 black crossc4 black crossd4 white queene4 black crossf4 black crossg4 black crossh4 black crossc3 black crossd3 black crosse3 black crossb2 black crossd2 black crossf2 black crossa1 black crossd1 black crossg1 black cross
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Moves of a knight
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c7 black crosse7 black crossb6 black crossf6 black crossd5 white knightb4 black crossf4 black crossc3 black crosse3 black cross
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Moves of a pawn
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b5 black crossc5 black circled5 black crossc4 white pawnf4 black circlee3 black crossf3 black circleg3 black crossf2 white pawn
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a b c d e f g h
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The king moves one square in any direction. There is also a special move called castling that involves moving the king and a rook. The king is the most valuable piece—attacks on the king must be immediately countered, and if this is impossible, the game is immediately lost (see Check and checkmate below).
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A rook can move any number of squares along a rank or file, but cannot leap over other pieces. Along with the king, a rook is involved during the king's castling move.
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A bishop can move any number of squares diagonally, but cannot leap over other pieces.
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A queen combines the power of a rook and bishop and can move any number of squares along a rank, file, or diagonal, but cannot leap over other pieces.
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A knight moves to any of the closest squares that are not on the same rank, file, or diagonal. (Thus the move forms an "L"-shape: two squares vertically and one square horizontally, or two squares horizontally and one square vertically.) The knight is the only piece that can leap over other pieces.
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A pawn can move forward to the unoccupied square immediately in front of it on the same file, or on its first move it can advance two squares along the same file, provided both squares are unoccupied (black dots in the diagram). A pawn can capture an opponent's piece on a square diagonally in front of it by moving to that square (black crosses). It cannot capture a piece while advancing along the same file. A pawn has two special moves: the en passant capture and promotion.
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Check and checkmate
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Main articles: Check and Checkmate
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When a king is under immediate attack, it is said to be in check. A move in response to a check is legal only if it results in a position where the king is no longer in check. There are three ways to counter a check:
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Capture the checking piece.
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Interpose a piece between the checking piece and the king (which is possible only if the attacking piece is a queen, rook, or bishop and there is a square between it and the king).
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Move the king to a square where it is not under attack.
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Castling is not a permissible response to a check.[2]
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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. It is never legal for a player to make a move that puts or leaves the player's own king in 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.[3]
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a b c d e f g h
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c6 black kingc2 white rooke1 white king
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1 1
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a b c d e f g h
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The black king is in check by the rook.
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a b c d e f g h
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e3 black bishopf3 black bishoph3 black kingh1 white king
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2 2
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1 1
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a b c d e f g h
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White is in checkmate, being unable to escape attack by the bishop on f3.
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Castling
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Main article: Castling
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Examples of castling (view animation)
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Once per game, each king can make a move known as castling. Castling consists of moving the king two squares toward a rook of the same color on the same rank, and then placing the rook on the square that the king crossed.
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Castling is permissible if the following conditions are met:[2]
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Neither the king nor the rook has previously moved during the game.
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There are no pieces between the king and the rook.
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Topic: Air Pollution
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Description: Air pollution is the contamination in Earth's atmosphere from pollutant substances.
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Topic: Air pollution
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Description: The air quality in Los Angeles has moderate air quality with an index of 58.
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10 |
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11 |
Neither the king nor the rook has previously moved during the game.
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12 |
There are no pieces between the king and the rook.
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