I have used some chess dictionaries I found on-line and even some printed books. But I was unsatisfied with what I have read. Too often, it seems that many writers simply copy what has been printed, even if what has been printed is incorrect, misleading, incomplete, or confusing.
So, I created my own. Produced from an editor’s point of view, with many spelling mistakes and other errors removed, important information added to make the definitions more complete, and even updating recorded moves from Descriptive Notation (DN) to Algebraic Notation (AN).
This dictionary, like every other dictionary is not complete, nor can any dictionary be complete. This dictionary is meant to include only the most common terms used by players, writers, teachers, and those who study the game.
But I have the satisfaction know that if I am missing something important, a kind, gentle reader would let me know.
My kind, gentle reader, please take some time off this Independence Day, shooting off fireworks, eating a hot dog, and enjoying your time at the beach. And let me know what I am missing.
On second thought, go ahead, enjoy your holiday, your weekend, your family and friends, and the fireworks. Come back when you are ready.
Have a wonderful and warm holiday!
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Rob’s Chess Dictionary
ACTIVE [adj. (1) describing a piece that has movement, (2) describing a type of defence that involves counterplay, (3) describing a game that has time limit of 30 minutes per player.]
ADJOURN (+ED, +ING, +S) [v. to take a break from a game to continue later.]
ADJUDICATE (+D, ADJUDICATING, +S) [v. to make a judgment made by an impartial person to determine the result of a game.]
ADJUDICATION (+S) [n. the act of making a judgment made by an impartial person to determine the result of a game.]
ADVANCE (+D, ADVANCING, +S) [v. to move forward, esp. with a pawn]
ADVANTAGE (+S) [n. a lead in material, time, space, or position, in a game or study. See DISADVANTAGE.]
ALBINO (+S) [n. a classification of studies that specify a specific white pawn move a problem or study ; adj. referring to specific white pawn moves in a problem or study.]
ALGEBRAIC [n. the most popular chess notation for recording moves.]
ANALYSIS (ANALYSES)
ANALYZE (+D, ANALYZING, +S) [n. to work out alternate or better moves or plans.]
ARISTOCRAT (+S) [n. a study or problem which has no pawns in the initial position]
ATTACK (+ED, +ING, +S)
AUTOMATON (+S) [n. a mechanical device that appeared to make moves in a game by itself during the 18th and 19th centuries but were controlled by a human player concealed inside the machine. The most famous automaton was the Turk.]
BAD BISHOP (+S) [n. a bishop blocked by his own pawns]
BATTERY (BATTERIES) [n. a rook and a rook or a rook and queen, of the same color, on the same file.]
BIND (+S) [n. a situation or a position that has restrictive movement.]
BISHOP (+S) [n. a diagonally moving piece.]
(CLASSICAL) BISHOP SACRIFICE (+S) (n. AKA “the Greek gift”, it is a typical sacrifice of a bishop on an opponent’s kingside castled position which forces the king out which he may be attacked. See game below.]
Greco-N.N.
Rome, 1620?
1.e4 e6 2.d4 Nf6 3.Bd3 Nc6 4.Nf3 Be7 5.h4 O-O 6.e5 Nd5 7.Bxh7+! (The classical bishop sacrifice. Black’s king has take the bishop and come out to face the upcoming attack, or he loses a pawn with a worse position.) 7…Kxh7 8.Ng5+ Bxg5 9.hxg5+ Kg8 10.Qh5 f5 11.g6 Re8 12.Qh8mate 1-0
BLACK (+S) [n. the side with the darker pieces that moves second in a game, (2) the defending side in a study.]
BLINDFOLD [n. a game which at least one of the players cannot see the board.]
BLITZ [n. a very fast game, esp. one with a five-minute time control.]
BLOCKADE (+D, BLOCKADING, +S) [v. to stop a piece, esp. a pawn from moving.]
BOARD (+S) [n. same as CHESSBOARD.]
BODEN’S MATE [n. AKA a Criss-Cross Mate, is a checkmate that occurs when the two bishops mate the enemy king, with each bishop coming from an opposite diagonal from the other.]
BOOK [n. a position or series of moves so well known it can be found in books.]
BRILLIANCY (BRILLIANCIES) [n. a game with a beautiful combination or with spectacular moves.]
BUGHOUSE (+S) [n. same as SIAMESE.]
BULLET [n. a game with a one-minute time control.]
BYE (+S) [n. a pre-arranged score of ½ for not playing a game in a tournament.]
CAISSA [n. the goddess of chess]
CAPTURE (+D, CAPTURING, +S) [v. to take a piece or pawn]
CASTLE (+D, CASTLING, +S) [v. to move the unmoved King two squares to the kingside or queenside and placing the rook on the other side of the King. You may not castle while in check, through check, or end with your king in check. See also CASTLE, LONG and CASTLE, SHORT.]
CASTLE, LONG [n. queenside castling. Written as O-O-O.]
CASTLE, SHORT [n. kingside castling. Written as O-O.]
CENTER [n. collectively, the squares e4, e5, d4, d5 that reside in the middle of the board.]
CHECK (+ED, +ING, +S) [v. to threaten the enemy king with an immediate capture. It is common in casual play to announce check, but forbidden in tournament play.]
CHECKMATE [n. same as MATE]
CHESSBOARD (+S) [n. a piece of material (wood, plastic, vinyl, etc.) that is meant to have pieces placed on it for study or play.]
CHESSMAN (CHESSMEN) [n. a piece in a set]
CLOCK (+S) [n. a timer used in a game]
COMPENSATION [n. possession of having other advantages, such as an open file, for a piece or pawn that has been gambitted, sacrificed, or lost.]
COMPOSER (+S) [n. one who creates problems or studies]
COOK (+ED, +ING, +S) [v. to find another solution to a problem or study.]
CORNER (+S) [n. the squares a1, a8, h1, and h8.]
CORRESPONDENCE [n. a chess game played through the mail or email.]
COUNTERPLAY [n. potential or actual aggressive moves by the defender designed achieve equality or an advantage]
DECLINE (+D, DECLINING, +S) [v. to not accept a gambit or sacrifice.]
DECOY (+S) [n. a pawn or piece that lures away an attacker.]
DEFENCE (+S)
DEFEND (+ED, +ING, +S)
DEFENDER (+S) [n. pawn or piece that thwarts an enemy attacking piece.]
DESCRIPTIVE [n. an old-fashioned notation used in English speaking countries until the 1980s.]
DEVELOP (+ED, +ING, +S) [n. to put a pawn or piece on a more useful square.]
DEVELOPMENT
DIAGONAL (+S)
DISADVANTAGE (+S) [n. being behind in material, time, space, or position, in a game or study. See ADVANTAGE.]
DOUBLED [adj. describing two pawns of the same color on the same file. See also TRIPLED.]
DRAW1 (+S) [n. a game ending in a tie.]
DRAW2 (+N +S, +ING) [v. to end the game in a tie.]
DRAWABLE [adj. describing a position in which a tie is the likely outcome.]
DUTCH [n. the opening 1.d4 f5.]
ECO [n. short for Encyclopedia of Chess Openings.]
EDGE [n. a small advantage]
ELO [n. the rating system most widely used. It was named after its inventor, Arpad Elo (1903-1992).]
EN PASSANT [n. French for “in passing”, it is a move that occurs when a pawn moves two squares from its starting position and passes an enemy pawn that has advanced to its fifth rank. The advanced pawn on the fifth rank may choose to capture the pawn as if the pawn had only moved forward one square.]
EN PRISE [n. a French term meaning “in a position to be taken”, “exposed to capture”, or simply, “a piece left hanging”. It is a piece or pawn that is unprotected and can be captured, usually the result of an oversight.]
ENDING (+S) [n. although it can be synonymous with ENDGAME, it is a term more likely to be used in a study rather than a game.]
ENDGAME (+S) [n. the stage of the game where few pieces, or no pieces, remain. Also known as the ENDING.]
ENVELOP (+S) [n. a flat paper cover in which a scoresheet of a game and a separate piece of paper that indicate a player’s next move (but unknown to anyone else) is inserted, sealed, and then presented to the tournament director for safekeeping until the game is resumed.]
EPAULETTE (+S) [n. a mate occurring when the opposing King is caught on the side of the board with both of his rooks preventing his sideward movement. The queen giving the mate stands in front of the king, close enough to mock and mate him but not close enough to be captured. See example below.]

EXCELSIOR (+S) [n. a pawn that promotes in a problem.]
EXCHANGE (+D, EXCHANGING, +S) [v. to trade pieces]
EXHIBITION (+S) [n. a chess game played for the public to promote the game, a tournament, a player, a group, or used as a fundraiser.]
EXPERT (+S) [n. a title just below a MASTER.]
EVALUATION (+S) [n. the analysis and assessment of a position.]
FAN [n. an acronym for Figurine Algebraic Notation.]
FEN [n. short for Forsyth–Edwards Notation, a concise method of recording a position.]
FIANCHETTO (+ED, +ING, +S) [v. to develop a bishop on b2 or g2 for White; or b7 or g7 for Black, and usually protected by three pawns; two on the sides, and one directly in front.]
FIDE [n. short for Fédération Internationale des Échecs, the international organization of chess, founded in Paris in 1924.]
FILE (+S) [n. a column of eight squares going from rank #1 to rank #8.]
FLAG (+S) [n. an indicator on a mechanical clock that moves (falls) when a certain time has elapsed.]
FLANK (+S) [n. the right and left files of the center.]
FOOL’S MATE [the shortest game that can end in mate. 1.f3 e5 2.g4? Qh4# 0-1]
FORK (+ED, +ING, +S) [v. to attacking more than one piece or pawn with a single piece.]
FM [n. short for Federation Master.]
GAMBIT (+S) [n. a move, typically in the opening and planned prior to the game, in which a player freely gives up a pawn, piece, or exchange, in the hope of either obtaining a tactical or positional advantage. See also SACRIFICE.]
GAME (+S) [n. the actual play of chess as opposed to problems, studies, and analysis.]
GM (+S) [n. short for GRANDMASTER.]
GRANDMASTER (+S) [n. the highest title in chess]
GRANDMASTER DRAW [n. a quick, uninteresting, listless, and even boring, draw.]
HOLE (+S) [n. a weak square which may easily be occupied by an enemy piece.]
HAUPTTURNIER (+S) [n. a German word that is freely translated as “candidates’ tournament”, or a tournament that one needed to win to be considered a master in Germany.]
ICCF [n. short for International Correspondence Chess Federation.]
IGM [n. short for International GrandMaster, an old term. It has mostly been replaced with GRANDMASTER or simply GM as “International” is implied.]
INFORMANT (+S) [n. well known periodical from Yugoslavia.]
INTERZONAL (+S) [n. a tournament to determine candidates to play in the World Championship.]
IQP [short for Isolated Queen Pawn. See ISOLANI.
ISOLANI [n. an isolated pawn on the d-file.]
ISOLATE (+D) [n. a pawn that does not have any other pawns of its own color on an adjacent file.]
J’ADOUBE [n. French word for “I adjust”. Spoken just before a piece being adjusted on its square. Used in “TOUCH MOVE” situations.]
KEY (+S) [n. correct first move in a problem.]
KIBITZ (+ED, +ES, +ING) [v. to give Illegal, and usually unwanted, advice given from one who is not a player in the game.]
KIBITZER (+S) [n. one who kibitzes.]
KING (+S) [n. the most important unit on the chess board. Losing the king means losing the game.]
KING PAWN OPENING [n. a game that opens with 1.e4.]
KINGSIDE (+S) [n. the “e”, “f”, “g”, and “h” files. The kings reside on the “e” file at the start of the game, hence the name. See also QUEENSIDE.]
KING’S GAMBIT [n. an opening that begins with 1.e4 e5 2.f4. White is willing to give up his f-pawn to gain an advantage in the game. Black sometimes has difficulties keeping his extra pawn but he can try to attack as well.]
KNIGHT (+S) [n. the piece that can leap over other pieces and moves in an “L” shape.]
KNIGHT’S TOUR [n. an exercise in which a knight starting on any square on an otherwise empty board makes 63 consecutive moves, touching each square exactly once.]
LUFT [n. German word for “air.” Moving a pawn forward so the king has an escape square is an example of LUFT.]
MATCH (+ES) [n. a series of games between two players for a championship, prize, or bragging rights]
MASTER (+S) [n. a player who obtains a rating over 2200]
MATE (+D, MATING, +S) [n. a position in which a player’s king is in check and there is no way to remove the threat. Checkmate is a win for the player delivering the mate.]
MINIATURE (+S) [n. a game lasting than 25 moves or less, usually with a win for one of the players, (2) a problem with less than 7 pieces.]
MOBILITY [n. freedom of a piece or the pieces.]
NAJDORF, Miguel [n. a Polish-Argentinian chess grandmaster (1910-1997).]
NAJDORF [n. a complex Sicilian arising from the moves 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6. It was named the GM who popularized it.]
NORM (+S) [n. a score a titled player would be expected to earn in a tournament.]
NOTATION (+S) [n. a system of writing down the moves.]
N.N. [n. a player in a recorded game whose name is not known. It may be short for No Name, Not kNown, or even the Latin phrase, “nomen nescio”, but there is no agreement.]
ODDS [n. a game in which a stronger player removes his pieces and/or pawns prior to game to make the game more equal. A stronger player may also offer time odds, when he would play when less time than his opponent.]
OLYMPIAD (+S) [n. a world team event held every two years.]
OPEN (+S) [n. a tournament which anyone can join]
OPPOSITION (+S) [n. the ability to force the other side to move into a disadvantageous position. See also ZUGZWANG]
OTB [n. short for Over The Board. As opposed to CORRESPONDENCE.]
PAIRING (+S) [n. a notification in a tournament informing the player what color he will be (Black or White), who is his opponent, and what board number they would play on.]
PATZER (+S) [n. slang term for a weak player.]
PAWN (+S) [n. a unit that moves forward and can promote to a more powerful piece upon reaching the eighth rank.]
PAWN CHAIN (+S) [n. two or more pawns of the same color diagonally linked. A pawn chain’s weakest point is the base.
PERPETUAL (+S) [n. a position on the board that a player is forced to repeat by his opponent.]
PGN [n. short for Portable Games Notation, a coding system that allows a game to be played on a computer or laptop.]
PIECE (+S) [n. the rook, knight, bishop, or queen. Sometimes the king is considered a piece.]
PIN (+NED, +NING, +S) [n. an attack on a piece that is in line within another, and usually more important piece, and cannot move without the piece behind it being liable to be captured.]
PLAYER (S) [n. a competitor in a tournament, match, or casual play.]
PLY (+S) [n. one-half of a whole move. The opening 1.e4 e5 2.Nf3 involves three PLYS.]
POINT (+S) [n. (1) a numerical evaluation given to each piece. For example, a rook is worth 5 points, (2) A single point given to the winner of a tournament or match game. A draw means each player receives ½ of a point. The winner of a tournament or match is the player with the most points.]
POSITION (+S) [n. the arrangement of pieces and pawns on the board.]
POSITIONAL [n. a type of play that avoid tactics, instead relying on applying, maintaining, and increasing pressure on a position.]
POISONED PAWN (+S) [n. an unprotected pawn that, if captured, causes problems for the side that took the pawn, including positional problems, mating threats, and/or material loss. The two most common examples of a poisoned pawn can be found in 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 (The Poisoned Pawn in the Najdorf) and 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Qc7 7.Qg4 (The Poisoned Pawn Variation of the Winawer).]
POSTAL [n. old term for correspondence chess]
PROBLEM (+S) [n. a puzzle where one side, usually White, can force mate or otherwise obtain a winning position]
EXAMPLE OF A PROBLEM
Morphy
New York Clipper, 1856

White to mate in 2
PROMOTE (+D, PROMOTING, +S) [v. to advance a pawn to the 8th rank and exchanging it for a queen. See also UNDERPROMOTION]
PROMOTION (+S) [n. the act of advancing a pawn to the 8th rank and exchanging for a queen.]
PROPHYLAXIS [n. a technique of preventing a move, or series of moves, designed to prevent an opponent from developing his pieces on ideal squares or otherwise improving his position.]
QUAD (+S) [n. a tournament with four players]
QUEEN1 (+S) [n. a piece that combines the powers of a rook and bishop. It is considered the strongest piece in chess.]
QUEEN2 (+ED, +ING, +S) [v. to promote a pawn]
QUEENSIDE (+S) [n. the “a”, “b”, “c”, and “d” files. The queens reside on the “d” file at the start of the game, hence the name. See also KINGSIDE.]
QUIET MOVE (+S) [n. a move that does not attack or capture an enemy piece but does increase the pressure to one’s opponent sometimes enough to force resignation.]
RANK (+S) [n. a row of eight squares going from the “a” file to the “h” file.]
RATING (+S) [n. a numerical estimation of a player’s strength.]
RECORD (+ED, +ING, +S) [v. to write down the moves of a game]
RESIGN (+ED, +ING, +S) [v. to formally give up a game]
RESIGNATION (+S) [n. the act of resigning.]
ROOK (+S) [n. a piece that moves vertically and horizontally and is involved in castling.]
ROOK LIFT (+S) [n. a move that places a rook in front of its own pawns, often on the third or fourth rank, in order to speed up an attack.]
ROUND ROBIN (+S) [n. an all-play-all tournament.]
SACRIFICE1 (+S) [n. a move in which a player freely gives up a pawn, piece, or exchange, in the hope of either obtaining a tactical or positional advantage or a drawn position (if losing). See also GAMBIT]
SACRIFICE2 (+D, SACRIFICING, +S) [v. to freely giving up a pawn, piece, or exchange, in the hope of either obtaining a tactical or positional advantage or a drawn position (if losing). See also GAMBIT.]
SCHOLAR’S MATE [n. a short game known by most scholastic players. 1.e4 e5 2.Bc4 Nc6 3.Qf3 Nd4? (> Nf6!) 4.Qxf7# 1-0.]
SCOREPAD (+S) [n. a collection of bound SCORESHEETS.]
SCORESHEET (+S) [n. a piece of paper especially made to record moves in a game. See also SCOREPAD.]
SECOND (+S) [n. one who helps and supports a player in preparation and analysis before and during a tournament or match]
SET (+S)
SIAMESE [n. a variation with two boards, four players, and general mayhem.]
SIMULTANEOUS [n. an exhibition where one player plays many others at the same time. Often abbreviated as SIMUL.]
SKEWER (+S) [n. an attack upon two (or more) pieces in a line.]
SKEWER (+ED, +ING, +S) [v. to engage in the act of setting up a SKEWER.]
SMOTHERED MATE (+S) [n. a mate in which a knight is attacking the enemy king who is surrounded by his pieces or pawns and cannot escape.]
A SMOTHERED MATE

SPRINGER (+S) [n. German word for “Knight”. The symbol “S” is sometimes used in studies in place of “N” (for Knight) in studies.]
SQUARE (+S)
STALEMATE1 (+S) [n. a position in which one side has to move but that has no legal moves and is not in check. The game is drawn.]
STALEMATE2 (+D, STALEMATING, +S) [v. to create a position in which one side must move but that has no legal moves and is not in check.]
STRATEGY (STRATEGIES) [n. long term gain]
STUDY (STUDIES) [n. an analysis of an actual or composed endgame with a stated goal in mind. White always moves first in a study.]
SWINDLE (+D, SWINDLING, +S) [v. gaining a victory from a lost position, usually playing on the overconfidence of the opponent.]
SWISS (+ES) [n. a type of tournament where players play others with similar scores.]
TABIA (or TABIYA) [n. a common position where analysis or play would start.]
TACTIC (+S) [n. short term gain]
TACTICAL [adj. describing a position or play that mainly features tactical play, which can include threatened forks, queen traps, promotions, checks, and mating threats.]
TD [n. short for Tournament Director]
TEMPO (TEMPI) [n. unit of time associated with a move, i.e., one move equals one tempo.]
THEMATIC TOURNAMENT (+S) [n. a tournament with all the games starting with the identical moves. Such tournaments are used for practicing or testing a variation or because it is a favorite opening among the participants.]
THEORY (THEORIES) [n. explanation of how to gain an advantage or save a lost position.]
TIME CONTROL (+S) [n. time allotted to each player to make his moves. The time controls need not to be the same for both players. See also ODDS.]
TN [n. short for Theoretical Novelty, a new move or idea in the opening.]
TOUCHED PIECE RULE [n. a player who touching a piece must move that piece on his turn if it is legal to do so.]
TOURNAMENT (+S) [n. a series of games between numerous players to determine a winner.]
TRANSPOSITION (+S) [n. a move, or a sequence of moves, that changes a recognizable position into another recognizable position. Most common in the opening stages of the game.]
TRÉBUCHET [n. mutual ZUGZWANG in which either player would lose if it were their turn to move.]
TRIANGULATION (+S) [n. a technique used in king and pawn endgames to lose a tempo and gain the opposition.]
TRIPLED [adj. describing three pawns of the same color on the same file. See also DOUBLED.]
UNDERPROMOTION (+S) [n. a promotion to a knight, rook, or bishop as opposed to a QUEEN.]
A REASON FOR UNDERPROMOTION

1.e8=N+ wins
UNRATED [n. one who has no rating ; adj. describing a tournament where no ratings are at stake.]
USCF [n. short for United States Chess Federation.]
VARIATION (+S) [n. alternate moves or lines from a main line]
WALLBOARD (+S) [n. a printed posting, usually attached to a wall of a tournament room, that displays the pairing, results, etc.]
WGM [n. short for Women’s GrandMaster]
WHITE (+S) [n. (1) the side with the lighter color pieces that moves first in a game, (2) the attacking side in a study.]
WIM [n. short for Women’s International Master.]
WINDMILL (+S) [n. a series of checks, alternating between a protected checking piece and a discovered check by another piece, ending with a material gain or mate.]
WING GAMBIT (+S) [n. the name given to variations of several openings in which one player gambits a wing pawn, usually the b-pawn. The two most common examples can be found in the French Advanced (1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4) and the Sicilian (1.e4 c5 2.b4).]
ZWISCHENZUG (+S) [n. a German word for “in-between move”, which is unexpected and usually changes the evaluation of a combination or position.]
ZUGZWANG (+S) [n. a German word for “the compulsion to move”, where any move would result in loss of position, material, or game.]