Intermediate Chess Terms
Chess terms for improving club players — the concepts that sharpen your middlegame and planning, explained in plain language by Chesswick.
- Absolute Seventh
- An absolute seventh is a rook on the seventh rank that cannot be attacked or driven away by enemy pawns, thereby securing permanent control of that rank.
- Action Chess
- Action Chess is the informal North American name for rapid chess at the longer end of the scale, most often G/25 or G/30 with or without a small increment, giving enough time for real calculation while still allowing two or three games in an evening.
- Advantage
- An advantage is any lasting edge in material, position, or initiative that improves one player's chances of winning.
- Alekhine's Gun
- Alekhine's Gun is a tripled major-piece battery on an open or half-open file with the queen behind two rooks to maximize pressure against a fixed weakness.
- AlphaZero
- AlphaZero is DeepMind's neural-network chess engine that learned superhuman play through self-play reinforcement learning and defeated Stockfish in 2017.
- Anastasia's Mate
- Anastasia's mate is a checkmate pattern in which a knight and rook combine to trap the enemy king, typically with the knight checking while the rook seals an adjacent file or rank and a friendly or enemy unit blocks one escape square.
- Anderssen's Mate
- Anderssen's Mate is a checkmate pattern in which a rook or queen checks the enemy king along an edge file or rank, supported by a friendly bishop or pawn that covers the sole flight square while the king's own pieces often block its other escapes.
- Antichess
- Antichess is a chess variant in which captures are mandatory and the player who captures the opponent's final piece or leaves the opponent with a lone king that has no legal moves wins.
- Arabian Mate
- The Arabian mate is a checkmate pattern in which a knight and rook combine to trap the enemy king in a corner, with the knight delivering check from a safe square while the rook protects it and seals the adjacent rank or file.
- Atomic Chess
- Atomic Chess is a chess variant in which every capture causes an explosion removing the captured piece, all adjacent non-pawn pieces, and the capturing piece itself unless it is a pawn, fundamentally changing piece values and king safety.
- Attacking Monster
- An attacking monster is a powerfully centralized piece, usually a knight or bishop, that controls many key squares and generates multiple threats against the enemy king or position.
- Auto-Flag
- Auto-flag is an online chess server setting that automatically ends the game and awards the win on time when a player’s clock reaches zero, without requiring the opponent to make a manual claim.
- Backward Pawn
- A backward pawn lags behind its neighboring pawns on adjacent files, cannot be protected by another pawn, and usually stands on a half-open file as a lasting target.
- Bad Bishop
- A bad bishop is one whose mobility and scope are restricted by its own pawns being fixed on squares of the same color.
- Battery
- A battery consists of two or more same-colour pieces aligned on a file, rank or diagonal, with the stronger piece behind, so the front unit can move to unleash the rear piece’s concentrated pressure.
- Battery Play
- A battery consists of two or more same-color pieces aligned on a rank, file, or diagonal so the rear piece supports or attacks through the forward piece once it moves or captures.
- Bean Counter
- A bean counter is a player who overvalues raw material counts and point values at the expense of positional, dynamic, and initiative factors.
- Berserk Enjoyer
- A Berserk Enjoyer is a player who frequently activates the berserk option in online arena tournaments, halving their starting clock time in exchange for two points instead of one on a win.
- Bishop
- A bishop is a chess piece that moves any number of unoccupied squares diagonally and remains on squares of one color for the entire game.
- Bishop Pair
- The bishop pair denotes possession of both bishops on opposite-colored squares, often conferring a lasting advantage in open or simplified positions.
- Blackburne's Mate
- Blackburne's Mate is a checkmate pattern in which a bishop protected by a knight delivers mate along a diagonal to a king whose flight squares are blocked by its own pieces or the board edge.
- Blind Pigs
- Blind pigs is the informal name for two rooks doubled on the seventh rank, where they typically create decisive threats against the enemy king and pawns.
- Blindfold Chess
- Blindfold chess is a format in which players conduct a full game without seeing the board, announcing moves verbally in algebraic notation while retaining the entire position in memory.
- Blindfold Simul
- A blindfold simul is a simultaneous exhibition in which one player faces multiple opponents without seeing the boards, tracking every position entirely in memory and announcing moves verbally or by notation.
- Blitz
- Blitz is chess played with a fast time limit, usually five minutes or less for the whole game.
- Blockade
- A blockade is the occupation of the square directly in front of an enemy passed pawn by a piece, typically a knight, which halts its advance, controls surrounding squares, and converts the pawn into a target.
- Boden's Mate
- Boden's mate is a checkmate pattern in which two bishops on adjacent diagonals attack a king whose own pieces or pawns block its escape squares, most often after queenside castling.
- Bongcloud Enjoyer
- A Bongcloud Enjoyer is a player who deliberately opens with the Bongcloud (1 e4 e5 2 Ke2) for its entertainment value rather than competitive merit.
- Book Draw
- A book draw is a position or variation that opening theory or endgame tablebases have established as drawable with accurate play by both sides.
- Book Slave
- A book slave is a player who memorizes long opening sequences from books or databases without grasping the ideas behind the moves, leaving them lost once the opponent deviates from those lines.
- Boomer Chess
- Boomer Chess is classical chess played at a deliberate pace with long time controls, typically 60 minutes or more per player, a style often favored by older players who value deep calculation over rapid or online formats.
- Boomer Move
- A boomer move is an older chess move or idea, popular before engines, once regarded as sound but shown by modern analysis to be inaccurate or inferior.
- Botvinnik
- Mikhail Botvinnik was a Soviet grandmaster and three-time world champion renowned for his scientific training methods and deep positional understanding.
- Brilliancy
- A brilliancy is a striking, often sacrificial move or sequence whose originality, depth, and elegance transform the position in an unexpected yet forcing way to produce a decisive advantage.
- Brilliancy Prize
- A brilliancy prize is an award given in some chess tournaments for the most spectacular, creative, or original game or combination played.
- Bronstein Delay
- Bronstein Delay is a chess-clock method that, after a player completes a move, restores to their remaining time the smaller of the preset delay or the time actually spent on that turn.
- Bughouse
- Bughouse is a team chess variant played on two boards where partners immediately pass captured pieces to each other for drops on their own board on any later turn.
- Building A Bridge
- Building a bridge is a rook-endgame technique, seen in the Lucena position, where the attacking rook moves beside its king to block lateral checks and let the king escort a seventh-rank passed pawn to promotion.
- Bullet Checkmate
- A bullet checkmate is a swift tactical mating sequence in bullet chess that exploits the one-minute time control through instant pattern recognition rather than deep calculation.
- Bullet Merchant
- A bullet merchant is an online player who grinds hundreds or thousands of bullet games in rapid succession, usually to farm rating points through volume or to sharpen reflexes and pattern recognition under extreme time pressure.
- Bulletproof
- A bulletproof chess position features an exceptionally solid pawn structure and piece placement that leaves the opponent with no realistic way to open lines, create targets, or generate meaningful threats.
- Calculation
- Calculation is the mental process of analyzing sequences of moves and replies several turns ahead to evaluate which options are sound.
- Can Opener
- The can-opener is a kingside attack in which a player advances the h-pawn, usually to h5 or h6, to force open the h-file against an opponent's castled king.
- Candidate Master
- A Candidate Master is the lowest official FIDE title, awarded automatically to any player who reaches a published FIDE rating of 2200.
- Capture
- Capture is the act of moving your piece onto a square occupied by an opponent's piece and removing that piece from the board.
- Caveman Attack
- A caveman attack is an unsophisticated, direct assault on the king that ignores positional principles in favor of crude threats and rapid piece activity.
- Cc Player
- A CC player competes in correspondence chess, exchanging moves by post, email or dedicated servers over days or weeks rather than in a single sitting.
- Center Camper
- A center camper is a piece, most often a knight, that occupies or firmly controls one of the four central squares to dominate key lines and restrict the opponent.
- Center Enjoyer
- A center enjoyer is a player who prioritizes early central pawn occupation and piece control of d4, d5, e4, and e5 to secure space advantages rather than adopting flank or hypermodern setups.
- Center Hugger
- A center hugger is a player who consistently prioritizes occupying or controlling the four central squares with pawns and pieces to cramp the opponent and limit counterplay.
- Centipawn
- A centipawn equals one-hundredth of a pawn's value and serves as the standard unit in engine evaluations to express fractional material or positional advantages.
- Cheapo
- A cheapo is a simple tactical trick or swindle played to catch an inattentive or time-pressed opponent.
- Chess Blindness
- Chess blindness is a player's temporary inability to see an obvious move, capture, or threat on the board, typically caused by fatigue, time pressure, or fixation on a single idea.
- Chess Boomer
- A Chess Boomer is a player from the baby-boomer generation who typically favors classical openings, over-the-board tournaments, and pre-computer-era study habits.
- Chess Composer
- A chess composer creates original chess problems such as mate-in-n puzzles, studies, or retrograde problems, designed for others to solve rather than for competitive play.
- Chess Cop
- A chess cop is an online player who actively polices rules by reporting suspected cheating, illegal moves, or etiquette violations to moderators or platforms.
- Chess Grinder
- A chess grinder is a player who methodically converts small advantages through patient, technical endgame play and sustained concentration over long games.
- Chess Masochist
- A chess masochist is a player who enjoys or deliberately seeks cramped, objectively worse positions that demand prolonged defense under heavy pressure.
- Chess Nerd
- A chess nerd is a dedicated player who invests heavily in studying openings, theory, puzzles, and engine analysis, often prioritizing deep preparation over casual or over-the-board play.
- Chess Problem
- A chess problem is a composed position in which the solver must find a precise sequence of moves to achieve a stipulated goal, most often checkmate in a set number of moves.
- Chess Zoomer
- A chess zoomer is a young online player, typically Gen Z, known for rapid time-control games and sharp tactical intuition honed on digital platforms.
- Chess960
- Chess960 (also called Fischer Random) is a chess variant in which the back-rank pieces are placed randomly at the start, subject to constraints that preserve castling options and balance.
- Chessfluencer
- A chessfluencer is an online creator who shares chess lessons, games, or commentary to build a following on social media.
- Chop Wood
- Chop wood means deliberately trading pieces to simplify the position, reduce complications, or steer toward a favorable endgame.
- Classical Champion
- A classical champion is the player holding the world title won under standard time controls, distinct from rapid or blitz formats.
- Clearance
- Clearance is a tactical motif in which a piece moves aside to vacate a square or open a line for a more powerful piece—usually a rook or queen—often gaining tempo by delivering check or creating a threat.
- Clock Enjoyer
- A clock enjoyer is a chess player who derives genuine enjoyment from managing the chess clock, navigating time pressure, and making practical decisions under strict time controls.
- Clock Ninja
- A clock ninja is a player exceptionally skilled at managing the chess clock, making accurate decisions quickly under severe time pressure.
- Clock Surfer
- A clock surfer is a player who repeatedly glances at the chess clock during the opponent’s turn, usually to assess remaining time and adjust playing speed or risk level accordingly.
- Coffeehouse Chess
- Coffeehouse chess is an informal attacking style that deliberately seeks complications, speculative sacrifices and practical tricks rather than the steady accumulation of small advantages.
- Coffin Nail
- A coffin nail is a move, often a pawn advance, that locks the enemy king into a mating net from which there is no escape.
- Colors Reversed
- Colors reversed describes an opening or position in which one player adopts the standard setup or responses normally associated with the opposite color, often arising via transposition.
- Compensation
- Compensation is a positional or dynamic advantage such as initiative, better pawn structure, or attacking chances that offsets a material deficit.
- Copium Prepper
- A Copium Prepper is a player who studies lines chiefly to stock ready rationalizations and excuses for likely losses rather than to improve their results.
- Copium Sac
- A copium sac is an objectively unsound sacrifice played mainly as a psychological coping mechanism in a lost or difficult position.
- Coquio's Mate
- Coquio's Mate is a checkmate pattern in which a queen protected by a knight mates a king trapped on the edge of the board by its own pieces or pawns.
- Countergambit
- A countergambit is an immediate pawn or piece sacrifice by the defender, almost always Black, offered in direct reply to the opponent’s opening gambit.
- Country Move
- A country move is a natural-looking but usually suboptimal chess move that an inexperienced player might choose without deeper calculation.
- Cp
- Cp is chess shorthand for counterplay, referring to active moves or plans that create threats, pressure, or complications to offset an opponent's initiative or material advantage.
- Cramped Position
- A cramped position restricts a player's piece mobility due to insufficient space, typically from their own pawns blocking development or the opponent's pieces controlling key squares.
- Crazyhouse
- Crazyhouse is a chess variant in which captured pieces can immediately be dropped back onto the board as the capturer's own pieces, following standard movement rules.
- Cross Pin
- A cross pin is a tactic in which one piece pins two enemy units along intersecting lines, so that either may be captured if it moves.
- Dancing King
- The dancing king is an endgame technique in which the king uses short zig-zag or triangular steps to lose a tempo, gain the opposition, avoid stalemate, or reach key squares at the right moment while supporting its own pawns.
- Dark Horse
- In chess, a dark horse is a lower-rated or little-known player who unexpectedly achieves strong results in a tournament.
- Dead Draw
- A dead draw is a position offering neither side any realistic winning chances even against suboptimal defense, typically from insufficient material or blocked structures that prevent all progress.
- Decoy
- A decoy is a tactic that lures an opponent’s piece onto a particular square, often exposing it to capture or diverting it from defending a more important target.
- Decoy Sacrifice
- A decoy sacrifice offers material to lure an enemy piece onto a specific square where it becomes vulnerable to attack or loses its defensive role.
- Defensive Wizard
- A defensive wizard is a player exceptionally skilled at defending difficult positions, parrying attacks, and steering games toward draws or counterplay.
- Deflection
- Deflection is a tactic that forces an opposing piece to abandon a key square or defensive duty, exposing a weakness the attacker can immediately exploit.
- Desperado
- A desperado is a doomed piece that captures the highest-value enemy unit reachable before it is taken.
- Dim Knight
- A dim knight is a knight restricted by pawns or pieces to few safe squares, giving it minimal influence on the game.
- Discord Prep
- Discord Prep is collaborative analysis and opening preparation done via group chats on Discord servers among club or online team players.
- Discovered Check
- A discovered check occurs when one piece moves aside, revealing an attack on the enemy king from a second piece positioned behind it on the same line.
- Discovery
- A discovery is a tactic in which one piece moves off a line, uncovering an attack from a second piece stationed behind it.
- Double Check
- A double check occurs when two pieces simultaneously check the enemy king, most often via a discovered check in which the moving piece also attacks the king.
- Dovetail Mate
- A dovetail mate is a queen mate against a king whose own pieces block its flight squares in a dovetail-like pattern, typically on the edge of the board.
- Dragon Variation
- The Dragon Variation is a sharp Sicilian Defense line where Black fianchettos the king's bishop via an early ...g6, typically after 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6.
- Drawing Weapon
- A drawing weapon is an opening line or variation deliberately chosen to maximize the likelihood of forcing a draw, especially when a half-point is the priority.
- Duck Chess
- Duck Chess is a variant in which players alternate moving a shared, uncapturable duck to any empty square, where it blocks lines of attack and cannot be ignored.
- Elo Farmer
- An Elo farmer is a player who deliberately seeks games or sections against much weaker opponents to inflate their rating through easy wins.
- Elo Gremlin
- An Elo Gremlin is the imaginary mischievous force players invoke to explain sudden, unexplained drops or stagnation in their Elo rating despite apparently solid results.
- En Passant
- A special pawn capture allowing a pawn to take an enemy pawn that has just advanced two squares, as if it had moved only one square.
- Engine Junkie
- An engine junkie is a player who over-relies on chess engines for analysis and move choices, often at the expense of independent thinking and deeper positional understanding.
- Engine Monkey
- An engine monkey is a player who blindly follows computer engine recommendations in analysis or play without grasping the underlying ideas or strategy.
- Engine Whisperer
- An engine whisperer is a player or analyst highly skilled at interpreting chess engine lines and evaluations, then translating them into practical human plans and decisions.
- Epaulette Mate
- An epaulette mate is a checkmate in which two rooks or queens attack the enemy king from adjacent squares on the same rank, blocking its lateral escapes like shoulder ornaments.
- Eval Bar Surfer
- An eval bar surfer is a player who repeatedly checks the engine evaluation bar during online play to steer move selection instead of relying on independent calculation.
- Eval Copium
- Eval copium is the tendency to rationalize a poor engine evaluation by fixating on minor advantages or the chance the opponent will err.
- Eval Hostage
- An eval hostage is a position where an engine's evaluation is dominated by one forcing line or material factor, obscuring the true strategic assessment until that factor is resolved.
- Evergreen Game
- The Evergreen Game is the 1852 encounter between Adolf Anderssen and Jean Dufresne, famed for its spectacular queen sacrifice and attacking brilliance.
- Exchange
- An exchange is a trade of pieces of equal value, most often a rook for a knight or bishop.
- Exchanges
- Exchanges occur when both players trade pieces of roughly equal value, such as a knight for a knight or a rook for a rook.
- Fairy Chess
- Fairy chess refers to variants that use non-standard pieces, boards, or rules, created mainly for composing problems and puzzles rather than tournament play.
- Family Fork
- A family fork is a knight tactic that simultaneously attacks the enemy king, queen, and one or more rooks.
- Fianchetto
- A fianchetto develops a bishop to b2, g2, b7 or g7 after the adjacent knight pawn advances one square, allowing it to control the long diagonal and influence the centre from a protected flank position.
- Fide
- FIDE is the international governing body for chess that maintains the official Laws of Chess, operates the global rating system, awards titles such as Grandmaster, and organizes the World Championship cycle and Chess Olympiad.
- Fide Handbook
- The FIDE Handbook is the official rulebook published by the International Chess Federation that sets out the laws of chess along with regulations for titles, events, and fair play.
- Fingerfehler
- A fingerfehler is an unintentional blunder caused by selecting the wrong piece or square through a slip of the hand or mouse, even though the intended move was sound.
- Fischer Random
- Fischer Random, also called Chess960, is a chess variant invented by Bobby Fischer in which each player's back-rank pieces are placed randomly in one of 960 legal arrangements, subject to constraints preserving castling and opposite-color bishops, to reduce reliance on memorized opening theory.
- Flag Champ
- A flag champ is a player who repeatedly wins by exhausting the opponent’s clock rather than by checkmate or resignation.
- Flag Demon
- A flag demon is a player, typically in blitz or bullet, who deliberately steers games into mutual time pressure to win on the clock rather than by checkmate or resignation.
- Flag Farmer
- A flag farmer is a player who deliberately maneuvers to win on time by inducing time pressure rather than pursuing checkmate or resignation.
- Flag Hanger
- A flag hanger is a player who refuses to resign a lost position in a timed game, continuing solely in hopes that the opponent’s flag will fall before checkmate.
- Flag Lord
- A flag lord is an informal term for a player who wins chiefly by forcing the opponent to lose on time rather than by checkmate or resignation.
- Flag Monkey
- A flag monkey is an informal term for a player who prioritizes winning on time by exploiting clock pressure rather than seeking a decisive position or checkmate.
- Flag Rat
- A flag rat is a player who deliberately plays low-quality or random moves quickly in fast time controls, hoping to win on time rather than through superior play.
- Flagging
- Flagging is winning a game by time forfeit when the opponent’s clock reaches zero, regardless of the board position.
- Fortress
- A fortress is a defensive endgame position in which the weaker side arranges its king and pieces to form an impregnable barrier that prevents the opponent from making progress or converting a material advantage, usually forcing a draw.
- Frozen Rook
- A frozen rook is a rook immobilized by pins, discovered attacks, or defensive duties that prevent it from moving without allowing decisive material loss or check.
- Greek Gift Sacrifice
- The Greek Gift is a classic bishop sacrifice on h7 (or h2) against a castled king, usually prepared by a knight on g5 and followed by Qh5 to launch a decisive kingside attack.
- Grob Goblin
- The Grob Goblin is a playful name for the Grob Opening, 1.g4, an unorthodox first move that advances the g-pawn to disrupt normal development and provoke sharp, unbalanced positions.
- Half-Pin
- A half-pin occurs when two same-color pieces stand on a line between an enemy piece and a target such as the king, so that moving either one exposes the other to capture or check.
- Harry Attack
- The Harry Attack is an aggressive anti-fianchetto system for White against Black’s kingside fianchetto setups such as the King’s Indian or Grünfeld, featuring an early h4 to harass the g6-pawn, discourage castling, and open the h-file for attack.
- Hope Chess
- Hope chess is the error of making a move that only works if the opponent overlooks a threat or blunder, rather than selecting the move that is best against any reply.
- Hyperbullet Addict
- A hyperbullet addict is a player who regularly seeks out and plays hyperbullet games, the fastest online time controls usually 15 seconds or less per player.
- Hypermodern
- Hypermodern is a chess approach that controls the center with pieces from afar rather than occupying it early with pawns, as seen in fianchetto openings like the King's Indian or Reti.
- Hypermodernism
- Hypermodernism is a chess approach that controls the center with pieces from a distance instead of seizing it right away with pawns.
- Initiative
- The initiative in chess is the ability to create threats that force the opponent to respond, thereby dictating the pace and direction of play.
- Interference
- Interference is a tactical motif in which a piece is placed on a line to obstruct an opponent’s defender from protecting a key square or unit, typically breaking a pin or discovered attack.
- Isolated Pawn
- An isolated pawn is a pawn with no friendly pawns on adjacent files, leaving it without pawn protection and often making it a target for attack by enemy pieces.
- King Hunt
- A king hunt is a sustained tactical attack that forces the enemy king from safety into the open board, often ending in checkmate.
- Luft
- Luft is the creation of an escape square for a castled king, usually by advancing one of the pawns sheltering it, to prevent back-rank mate threats.
- Material
- Material refers to the pieces and pawns each side still has on the board, compared by their standard values to see who holds the advantage.
- Middlegame
- The middlegame follows the opening once both sides complete development and the central pawn structure takes shape, shifting focus to concrete plans, piece activity, and tactics until trades simplify the position into an endgame.
- Minor Pieces
- Definition awaiting review.
- Minority Attack
- A minority attack is a strategic queenside pawn advance by the player with fewer pawns on that wing, aimed at provoking lasting weaknesses like an isolated d-pawn or backward c-pawn in the opponent’s larger pawn structure.
- Morphy's Mate
- A checkmate pattern in which a rook or queen attacks the castled king along an edge file while protected by a bishop that also controls key flight squares.
- MuZero
- MuZero is DeepMind's reinforcement-learning system that masters chess via self-play by learning an internal model of game dynamics with no pre-coded rules or chess knowledge.
- Nimzowitsch
- Aron Nimzowitsch was a Latvian-Danish grandmaster and influential chess theorist whose writings, notably My System, shaped modern positional concepts such as overprotection, blockade, and prophylaxis.
- Open File
- An open file is a vertical column with no pawns on it, allowing rooks and queens to move freely along its entire length.
- Opposition
- Opposition occurs when two kings face each other on the same rank or file with one square between them, so that the player whose turn it is to move must give way and allow the opponent’s king to advance.
- Outpost
- An outpost is a square, typically advanced in the opponent's half of the board, that cannot be attacked by an enemy pawn and is therefore a secure base for a piece, usually a knight, often protected by one of your own pawns.
- Passed Pawn
- A passed pawn is one whose advance to promotion cannot be blocked or captured by opposing pawns on the same file or either adjacent file ahead of it.
- Patzer Gives A Check
- A patzer gives a check when a player delivers an unproductive check that hands the opponent a free tempo or improved position.
- Patzer Sees A Check
- A patzer sees a check when a weak player plays a checking move at once, usually without considering whether it truly improves the position or simply shifts the opponent’s king to a better square.
- Pawn Break
- A pawn break is a pawn advance that attacks an opposing pawn, usually to open lines for pieces or alter the pawn structure.
- Pawn Chain
- A pawn chain is a diagonal line of same-color pawns on adjacent files, each protecting the one ahead while being protected by the one behind.
- Pawn Storm
- A pawn storm is an aggressive advance of connected pawns on one flank, usually to open lines against the enemy king or seize space and initiative.
- Pawn Structure
- Pawn structure is the fixed arrangement of pawns for both sides that creates lasting strengths, weaknesses, and strategic plans.
- Perp
- Perp is shorthand for perpetual check, a repeating series of checks that forces a draw by repetition.
- Perpetual Check
- A perpetual check is a drawing tactic in which one player forces an unending cycle of checks that the opponent cannot escape without allowing repetition.
- Philidor Position
- The Philidor Position is a fundamental defensive resource in rook-and-pawn endgames in which the defending rook controls the third rank to cut off the attacking king while the defending king remains in front of the passed pawn to block its advance.
- Pigs On The 7Th
- Two rooks doubled on the opponent’s seventh rank, known as pigs on the seventh, create a powerful attacking formation that typically sweeps up pawns and generates decisive threats against the enemy king.
- Poisoned Pawn
- A poisoned pawn appears free to capture yet hands the opponent lasting initiative, dangerous tactical threats, or a serious positional concession that outweighs its value.
- Post-Mortem
- A post-mortem is the analysis and discussion of a completed chess game, usually by the players, to identify mistakes, better moves, and lessons learned.
- Prophylaxis
- Prophylaxis is the practice of making a quiet move that anticipates and neutralises an opponent’s intended plan or threat before it arises.
- Queen
- The queen is chess's most powerful piece, able to move any number of squares vertically, horizontally, or diagonally.
- Raking Bishops
- Raking bishops are a pair of bishops posted on adjacent open diagonals, where they sweep across the board and create powerful attacking or controlling pressure.
- Rating Vampire
- Definition awaiting review.
- Romantic
- Romantic chess refers to the aggressive 19th-century style favoring rapid development, open lines, and spectacular sacrifices over slow positional maneuvering.
- Rook
- The rook moves any number of unoccupied squares horizontally or vertically without jumping, captures by replacement, starts on the a- and h-files, and gains maximum power on open files by attacking their full length or reaching the seventh rank.
- Royal Fork
- A royal fork is a knight fork that attacks both the enemy king and queen at once, forcing the king to move and usually winning the queen for a knight.
- Sacrifice
- A sacrifice is the intentional surrender of material, such as a pawn or piece, to obtain a compensating advantage like a stronger attack or lasting positional gain.
- Sandbagging
- Sandbagging is deliberately losing games to lower your rating and enter weaker sections for an easier path to prizes.
- Seventh Rank
- The seventh rank (rank 7 for White, rank 2 for Black) is where the opponent’s pawns begin the game, and a rook or queen posted there usually attacks those pawns from behind while restricting the enemy king.
- Smurf
- A smurf is a strong player who creates a new low-rated account to face much weaker opponents, typically for easy wins or low-pressure practice.
- Soviet School
- Definition awaiting review.
- Stalemate Trick
- A stalemate trick is a tactical sequence in which a player forces the opponent into a position with no legal moves while the king is not in check, converting a likely loss into a draw.
- Swashbuckling
- Swashbuckling denotes a bold attacking style that willingly accepts material deficits or structural damage to gain rapid development, open lines, and lasting pressure against the opponent.
- Swindle
- A swindle is a tactical resource that lets a player in a lost position force a draw or win by exploiting the opponent’s relaxation and resulting oversight.
- Swindling Chances
- Swindling chances are the tactical or psychological resources that let a player in a lost position provoke mistakes and salvage a draw or win.
- Tactic Goblin
- A tactic goblin is an intermediate player who habitually searches for forcing sequences such as forks, pins, and discoveries to gain material or initiative, often prioritizing calculation over positional planning.
- Tactics
- Tactics are short sequences of forcing moves that win material, deliver checkmate, or gain a decisive advantage by exploiting immediate threats like forks, pins, or discovered attacks.
- Tall Pawn
- A tall pawn is a bishop so hemmed in by its own pawns that it has little more scope or value than a pawn despite its greater height.
- Tempo
- Tempo is the advantage of making a useful move while forcing the opponent to respond without progress, often gained by a check, threat, or capture that compels a reply.
- Threat
- A threat is a move or plan that would win material, deliver check, or gain another advantage if the opponent does not prevent it on their next turn.
- Tilting
- Tilting is the self-reinforcing spiral of errors that begins when frustration from one setback causes a player to lose emotional control and play impulsive moves that compound the damage.
- Time Troll
- A time troll is an opponent who deliberately slows play or makes nuisance moves to provoke time trouble, errors, or frustration without seeking a normal chess win.
- Triangulation
- In endgames, triangulation is a king maneuver along a three-square triangle that returns the king to its starting square after an odd number of moves, losing a tempo to place the opponent in zugzwang.
- Underpromotion
- Underpromotion occurs when a pawn reaching the eighth rank is promoted to a rook, bishop, or knight rather than the default queen, usually to avoid stalemate or secure a specific tactical gain.
- Valve
- A valve is a chess-problem device in which one piece moves along a line, opening that line for an attack or mate while simultaneously closing a different line.
- X-Ray
- An X-ray is a tactical motif where a piece attacks through an enemy unit to control or threaten a square or piece behind it, akin to a skewer.
- X-Ray Attack
- An X-ray attack occurs when a piece attacks through an opposing piece to threaten a more valuable target behind it on the same rank, file or diagonal.
- Zugzwang
- A position in which every legal move by the player to move worsens their standing, as passing is not permitted.
- Zwischenzug
- A zwischenzug (German for "in-between move") is an unexpected forcing move such as a check or new threat inserted before the anticipated reply, compelling the opponent to respond first and often improving the outcome of the ensuing exchange.