A chessboard is a gameboard used to play chess. It consists of 64 squares, 8 rows by 8 columns, on which the chess pieces are placed. It is square in shape and uses two colours of squares, one light and one dark, in a chequered pattern. During play, the board is oriented such that each player's near-right corner square is a light square.
The bishop is a piece in the game of chess. It moves and captures along diagonals without jumping over intervening pieces. Each player begins the game with two bishops. The starting squares are c1 and f1 for White's bishops, and c8 and f8 for Black's bishops.
A chess piece, or chessman, is a game piece that is placed on a chessboard to play the game of chess. It can be either white or black, and it can be one of six types: king, queen, rook, bishop, knight, or pawn.
The rules of chess govern the play of the game of chess. Chess is a two-player abstract strategy board game. Each player controls sixteen pieces of six types on a chessboard. Each type of piece moves in a distinct way. The object of the game is to checkmate the opponent's king; checkmate occurs when a king is threatened with capture and has no escape. A game can end in various ways besides checkmate: a player can resign, and there are several ways a game can end in a draw.
The Lewis chessmen or Uig chessmen, named after the island or the bay where they were found, are a group of distinctive 12th-century chess pieces, along with other game pieces, most of which are carved from walrus ivory. Discovered in 1831 on Lewis in the Outer Hebrides of Scotland, they may constitute some of the few complete, surviving medieval chess sets, although it is not clear if a period-accurate set can be assembled from the pieces. When found, the hoard contained 93 objects: 78 chess pieces, 14 tablemen and one belt buckle. Today, 82 pieces are owned and usually exhibited by the British Museum in London, and the remaining 11 are at the National Museum of Scotland in Edinburgh.
This glossary of chess explains commonly used terms in chess, in alphabetical order. Some of these terms have their own pages, like fork and pin. For a list of unorthodox chess pieces, see Fairy chess piece; for a list of terms specific to chess problems, see Glossary of chess problems; for a list of named opening lines, see List of chess openings; for a list of chess-related games, see List of chess variants; for a list of terms general to board games, see Glossary of board games.
Vernon Rylands Parton was an English chess enthusiast and prolific chess variant inventor, his most renowned variants being Alice chess and Racing Kings. Many of Parton's variants were inspired by the fictional characters and stories in the works of Lewis Carroll. Parton's formal education background, like Lewis Carroll's, was in mathematics. Parton's interests were wide and he was a great believer in Esperanto.
In chess, promotion is the replacement of a pawn with a new piece when the pawn is moved to its last rank. The player replaces the pawn immediately with a queen, rook, bishop, or knight of the same color. The new piece does not have to be a previously captured piece. Promotion is mandatory when moving to the last rank; the pawn cannot remain as a pawn.
The touch-move rule in chess specifies that a player, having the move, who deliberately touches a piece on the board must move or capture that piece if it is legal to do so. If it is the player's piece that was touched, it must be moved if the piece has a legal move. If the opponent's piece was touched, it must be captured if it can be captured with a legal move. If the touched piece cannot be legally moved or captured, there is no penalty. This is a rule of chess that is enforced in all formal over-the-board competitions.
A pawnless chess endgame is a chess endgame in which only a few pieces remain, and no pawns. The basic checkmates are types of pawnless endgames. Endgames without pawns do not occur very often in practice except for the basic checkmates of king and queen versus king, king and rook versus king, and queen versus rook. Other cases that occur occasionally are (1) a rook and minor piece versus a rook and (2) a rook versus a minor piece, especially if the minor piece is a bishop.
The Staunton chess set is the standard style of chess pieces, recommended for use in competition by FIDE, the international chess governing body.
A mathematical chess problem is a mathematical problem which is formulated using a chessboard and chess pieces. These problems belong to recreational mathematics. The most well-known problems of this kind are the eight queens puzzle and the knight's tour problem, which have connection to graph theory and combinatorics. Many famous mathematicians studied mathematical chess problems, such as, Thabit, Euler, Legendre and Gauss. Besides finding a solution to a particular problem, mathematicians are usually interested in counting the total number of possible solutions, finding solutions with certain properties, as well as generalization of the problems to N×N or M×N boards.
The following outline is provided as an overview of and topical guide to chess:
The House of Staunton (HOS) is an Alabama-based company founded by Frank Camaratta in 1990 that manufactures chess pieces, chessboards, and chess boxes.
The Dubrovnik chess set is a style of chess pieces influenced by the Staunton chess set and used to play the game of chess. These chessmen are considered to have significant historical importance and are regarded as a timeless design classic. Over the decades several variants of the Dubrovnik chessmen were designed.
Hostage chess is a chess variant invented by John A. Leslie in 1997. Captured pieces are not eliminated from the game but can reenter active play through drops, similar to shogi. Unlike shogi, the piece a player may drop is one of their own pieces previously captured by the opponent. In exchange, the player returns a previously captured enemy piece which the opponent may drop on a future turn. This is the characteristic feature of the game.
The Selenus chess set is a style of chess set, in use before the standardization of chess pieces that happened after the Staunton chess set was launched in 1849 by games manufacturer John Jaques of London. The Selenus sets were typical of Germany and Northern Europe and are named after Gustavus Selenus, the pen name of Augustus the Younger, Duke of Brunswick-Lüneburg, author of the Chess or the King's Game, an important chess manual published in the 17th century. The standard included delicate lathe turned bases and shafts and tiers with circlets resembling crowns. Pieces were distinguished by heights, the number of tiers and sometimes by symbols.
Game pieces of the Lewis chessmen hoard include the ninety-three game pieces of the Lewis chessmen hoard found on the Isle of Lewis in the Outer Hebrides of Scotland. Medieval in origin, they were first exhibited in Edinburgh in 1831 but it is unclear how much earlier they had been discovered. The hoard comprised seventy-eight distinctive chess pieces and fifteen other non-chess pieces, nearly all carved from walrus tusk ivory, and they are now displayed at the British Museum in London and National Museums Scotland in Edinburgh. Another chess piece, which turned up in 1964 and in 2019 was attributed to have come from the original hoard, now belongs to a private collector.
The Charlemagne chessmen are a group of 11th century chess pieces made from ivory, now in the Cabinet des Médailles, Bibliothèque Nationale in Paris, France. In 1598 the set contained 30 pieces, but after the French Revolution only 16 pieces survived. Next to the Lewis chessmen, the set is thought to be the second-most important collection of medieval chess pieces in the world. It is one of the best-preserved sets of figures from the High Middle Ages.
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