Chess Terms Glossary (A–Z) – Chess Terminology Explained
Chess can sound like a foreign language at first — en passant, luft, “hanging a piece”, “royal fork”… This page is your quick, modern chess terms glossary. Every definition is written in plain English, so you can understand commentary, follow lessons, and recognise patterns in your own games. Expanded and reviewed May 2026.
Need something more specific?
This is the main A–Z chess terminology page. If you want deeper terms in a particular area, use one of these specialist glossaries:
Filter by category (Beginners, Tactics, Strategy, Endgames, Openings, Rules/General, Champions) or jump using the A–Z bar.
Type a few letters to show matching A-Z glossary entries. Category buttons still work when the search box is empty.
- Absolute Pin
- A pin against the king. The pinned piece cannot legally move if doing so would expose check.
- Advantage
- Having a better position than your opponent, such as a material advantage, space advantage, development advantage, or safer king.
- Adjudication
- The process of an arbiter determining the result of an unfinished game based on the position.
- Adjournment
- The temporary suspension of a game to be continued later. Rare in modern play.
- Alekhine, Alexander
- The 4th World Champion. Known for complex tactical attacks and deep combinations.
- Alekhine's Gun
- A heavy-piece battery where rooks are stacked behind a queen on an open or semi-open file.
- Algebraic Notation
- The standard method for recording chess moves, such as e4, Nf3, and O-O.
- Anand, Viswanathan
- The 15th World Champion. The "Madras Tiger," famous for rapid calculation speed.
- Anastasia's Mate
- A rook mate on the edge where a knight controls the king's escape squares.
- Anderssen's Mate
- A supported back-rank mating pattern where coordinated pieces trap the king with no safe escape.
- Annihilation of Defence
- A forcing sequence that wipes out the defensive units around the king or a decisive target.
- Annotation
- Commentary, notes, and analysis added to a recording of a game.
- Arbiter
- The referee of a chess tournament responsible for enforcing rules.
- Armageddon
- A tie-break game where White has more time but must win; Black wins if the game is drawn.
- Arabian Mate
- A rook-and-knight corner mate pattern, also called Arabian Checkmate. It is one of the oldest named mating patterns.
- Artificial Castling
- Manually moving the king and rook over several turns to achieve a castled position.
- Attack
- An aggressive action that creates a threat against material, the king, or a key square.
- Attraction
- A decoy idea that drags a king, queen, or defender onto a square where a forcing continuation works.
- Back Rank
- The first or eighth rank. A weak back rank can lead to checkmate.
- Back-Rank Mate
- A rook or queen mate on the back rank when the king is trapped by its own pawns.
- Back-Rank Tactic
- A tactic using the back-rank weakness even if it does not end in mate immediately.
- Back-Rank Weakness
- A tactical weakness where the king has no flight square behind its own pawns.
- Backward Pawn
- A pawn that has fallen behind its neighbors and cannot be supported by other pawns.
- Bad Bishop
- A bishop blocked by its own pawns. It becomes a tactical target when it cannot defend key squares.
- Bad Piece Tactic
- Exploiting a piece with no mobility, no targets, or no useful defence.
- Balestra Mate
- A bishop-delivered mate where the queen cuts off the king's escape both diagonally and vertically.
- Battery
- Two or more pieces lined up on a file, rank, or diagonal to multiply pressure.
- Bishop
- A minor piece that moves diagonally. Typical value: 3.
- Bishop and Knight Mate
- A technical checkmate where bishop, knight, and king force the lone enemy king into the bishop-colour corner.
- Bishop Pair
- Having both bishops is often a long-term advantage in open positions.
- Black
- The player who moves second. The pieces are usually dark-colored.
- Blackburne's Mate
- A bishop-pair and knight mating pattern, often unlocked by a queen sacrifice.
- Blindfold Chess
- Playing chess without looking at the board.
- Blind Swine Mate
- A seventh-rank mate pattern where heavy pieces invade and trap the king with help from a stopper.
- Blitz
- Fast chess. Typically 3 to 5 minutes per player for the whole game.
- Blockade
- Placing a piece directly in front of an enemy passed pawn to stop it.
- Blocking
- Putting a piece in the way of an enemy line or escape route. Blocking tactics often appear in mating nets.
- Blunder
- A severe mistake that loses material or the game immediately. Worse than a normal mistake.
- Blunder Check
- A final scan before moving: is the king safe, is anything hanging, and what forcing reply does the opponent have?
- Board Geometry
- The board has 64 squares organized into ranks, files, and diagonals.
- Board Setup
- The standard arrangement of pieces at the start of the game.
- Boden's Mate
- A two-bishop mating pattern where crossing diagonals trap a king blocked by its own pieces.
- Botvinnik, Mikhail
- The 6th World Champion. Pioneer of scientific preparation and the Soviet school.
- Breakthrough
- A forcing pawn or piece operation that breaks through a blockade or defensive wall.
- Brilliancy
- A game containing a beautiful, correct strategic concept or sacrifice.
- Brilliant Move
- A striking tactical move, often involving a sacrifice or quiet move, that solves the position in a surprising way.
- Bullet Chess
- Ultra-fast chess. Typically 1 minute or less per player.
- Calculation
- Mentally visualizing future moves and variations.
- Calculation Discipline
- The habit of calculating forcing lines accurately instead of stopping after the move you want to work.
- Capablanca, Jose Raul
- The 3rd World Champion. Famous for endgame mastery and machine-like precision.
- Candidate Master (CM)
- A FIDE title ranking below FIDE Master.
- Candidate Move
- A move worth calculating before choosing. Tactical candidates usually come from checks, captures, threats, loose pieces, and exposed kings.
- Capture
- Taking an opponent's piece by moving onto its square; captures become tactical when the recapture, defender, or move order contains a hidden problem.
- Capture Race
- A sequence where both sides take material, and the tactic depends on the final count or in-between move.
- Carlsen, Magnus
- The 16th World Champion. Universal style and relentless endgame technique.
- Castling
- The only move where two pieces move at once, moving the king and rook to improve king safety.
- CCT Scan
- The practical checks-captures-threats scan. It gives a repeatable order for finding forcing moves.
- Center
- The critical central squares: e4, d4, e5, and d5.
- Centralization
- Bringing pieces toward the center where they control the most squares.
- Check
- An attack on the king that must be answered immediately.
- Checkmate
- The position where the king is in check and has no legal escape, capture, or block. Game over.
- Checkmate Pattern
- A recurring mating shape that helps you recognise how the king is trapped.
- Checks, Captures, Threats (The 3 C's)
- A simple tactics checklist: first look at all checks, captures, and threats on every move.
- Classical Chess
- Standard slow chess, such as 90 or more minutes per player.
- Clearance
- Vacating a key square or line without necessarily sacrificing material. The cleared path creates the tactic.
- Clearance Sacrifice
- Moving or sacrificing a piece to vacate a square, file, rank, or diagonal for another piece.
- Clock
- The timer used to limit thinking time. If your time reaches zero, you usually lose by flagging.
- Closed Game
- A position with locked pawn chains where lines are blocked and manoeuvring dominates.
- Columns vs Files
- Beginners often say columns. In chess, the vertical columns are called files.
- Combination
- A forced sequence, often involving a sacrifice, that leads to material gain, mate, or a decisive positional result.
- Compensation
- Positional benefits gained in return for sacrificed material, such as initiative, king safety, structure, or active pieces.
- Connected Pawns
- Pawns on adjacent files that can support each other.
- Corner Mate
- A knight-delivered corner checkmate where a rook or queen controls escape squares and a blocker seals the final flight square.
- Corridor Mate
- A king is trapped in a narrow line of escape squares and mated by a rook, queen, or bishop.
- Corridor Mate (Diagonal Corridor Mate)
- A tactical motif where a king is trapped along a long diagonal and mated by a bishop or queen, with escape squares blocked.
- Correspondence Chess
- Games played over days or weeks per move.
- Counter-Tactic
- A tactic played in response to an opponent's threat. The best defence is often a more forcing move.
- Counterattack
- Answering pressure by creating an equal or stronger threat.
- Critical Moment
- A position where the evaluation can change sharply and deeper tactical calculation is needed.
- Cross Check
- A reply to check that also gives check back, turning defence into a forcing counterattack.
- Cross-Pin
- A piece is pinned along one line and pressured from another, leaving it almost paralysed.
- Damiano's Bishop Mate
- A queen-and-bishop mate where the bishop supports the queen's final capture.
- Damiano's Mate
- A classic queen-and-pawn mate where the pawn confines the king and the queen delivers mate.
- Dark Square Complex
- A position where a player is especially vulnerable on the dark squares, often after trading the dark-squared bishop.
- Declined (Gambit)
- Refusing a gambit pawn offered by the opponent, such as in the Queen's Gambit Declined.
- Decoy
- Luring an enemy piece onto a bad square where it can be attacked, pinned, forked, or mated.
- Defend
- Preventing an opponent's threat by protecting a piece, square, or king, blocking a line, or moving to safety.
- Defender Overload
- A specific overload where the same defender guards two or more essential targets.
- Deflection
- Forcing a defender away from its duty. The target falls because the defender can no longer protect it.
- Demolition of Pawn Structure
- Destroying the king's pawn cover, often by sacrifice, so the attacking pieces gain direct access.
- Desperado
- A doomed piece that causes maximum damage before it is captured.
- Destruction of Guard
- Another name for removing the defender. It highlights the guard's role rather than the target.
- Development
- Activating pieces from the back rank. Being ahead in development means more pieces are in play.
- Diagonal
- A straight line of same-colored squares running at an angle across the board.
- Diagonal Tactic
- A tactic based on bishop or queen pressure along a diagonal, often against the king, rook, or queen.
- Ding Liren
- The 17th World Champion. Known for resilience and elite defence.
- Discovered Attack
- One piece moves and reveals an attack from a piece behind it. The moving piece often creates a second threat.
- Discovered Check
- A discovered attack where the revealed line checks the king.
- Distracting the Defender
- Forcing a defender to attend to a new threat so it abandons the original target.
- Double Attack
- A move that creates two threats at once.
- Double Bishop Mate
- A two-bishop checkmate where parallel diagonals trap the king.
- Double Check
- The king is checked by two pieces at once. Since one move cannot answer both attacks, the king usually must move.
- Double Knight Mate
- A two-knight mating pattern where one knight forces the king into the corner and the other finishes the mate.
- Double Threat
- Two independent threats created by one move. The defender can often stop only one of them.
- Doubled Pawns
- Two pawns of the same color on the same file, often a structural weakness.
- Dovetail Mate
- A queen contact mate where the queen checks diagonally beside the king while escape squares are blocked or controlled.
- Dovetail Mate AKA Cozio's Mate
- Another name presentation for Dovetail Mate, also known as Cozio's Mate.
- Draw
- A game where neither player wins. Includes stalemate, repetition, the 50-move rule, and agreement.
- Draw by Agreement
- When both players agree to end the game as a draw.
- Draw Offer
- An offer to end the game as a draw; the opponent can accept or decline.
- Drawing Mechanism
- A repeatable defensive resource such as perpetual check, stalemate, fortress, or insufficient winning progress.
- Elimination
- Removing a piece that controls an important square or protects a key target.
- Elo Rating
- The system used to calculate the relative skill level of chess players.
- En Passant
- A special pawn capture rule, meaning in passing.
- En Prise
- A piece or pawn is en prise when it is exposed to immediate capture, usually for free or at a favourable cost.
- Endgame
- The final phase of the game where few pieces remain and the king becomes more active.
- Endgame Decoy
- A decoy used in simplified positions, often to lure the king away from a pawn or into zugzwang.
- Endgame Skewer
- A skewer in simplified positions, often involving king, rook, queen, or promoted pawn geometry.
- Engine
- Computer software used to analyse games and evaluate positions.
- Epaulette Mate
- A checkmate where the king's own pieces block both shoulder squares, making the final escape impossible.
- Euwe, Max
- The 5th World Champion. Defeated Alekhine with logic and preparation.
- Exchange
- Trading pieces, often of roughly equal value, to simplify or change the position.
- Exchange Sacrifice
- Giving up a rook for a bishop or knight to gain attack, structural damage, dark-square control, or long-term compensation.
- Exchange Variation
- An opening line defined by an early exchange of pawns or pieces, such as the French Exchange Variation.
- Expert
- A strong player below master level, often in the 2000 to 2199 Elo range.
- Family Fork
- A knight fork that attacks several major targets at once, usually king, queen, and rook.
- Fawango
- An internet meme or joke opening name that circulates online. It is not a real classical chess term.
- Fianchetto
- Developing a bishop to b2 or g2, or b7 or g7, to control a long diagonal.
- FIDE
- The International Chess Federation, the world governing body for chess.
- FIDE Master (FM)
- A chess title ranking below International Master.
- Fifty-Move Rule (and 75-Move Rule)
- A draw can be claimed after 50 moves with no pawn move or capture. Under FIDE rules, 75 moves can trigger an automatic draw.
- File
- A vertical column of squares on the board, lettered a through h.
- Fischer, Bobby
- The 11th World Champion. Famous for clarity, willpower, and the 1972 match against Spassky.
- Flag
- To lose on time when your clock reaches zero.
- Fool's Mate
- The fastest possible checkmate, reached in two moves if White fatally weakens the king.
- Forcing Move
- A move that sharply limits the opponent's replies: checks, captures, and direct threats.
- Forced Move
- A move you must make because other moves are illegal or lose immediately.
- Fork
- One piece attacks two or more targets at the same time.
- Fortress
- A defensive setup that cannot be broken despite material disadvantage.
- Gaining Space
- Advancing pawns and pieces to control more territory and restrict the opponent.
- Gambit
- Sacrificing material, often a pawn, for development, central control, or attack.
- Good Bishop
- A bishop that is not blocked by its own pawns and has active diagonals.
- Grandmaster (GM)
- The highest title in chess.
- Greco's Mate
- A queen-or-rook edge mate where a bishop contains the king and the defender's own pawn helps complete the cage.
- Greek Gift
- The classic bishop sacrifice on h7 or h2 to rip open the enemy king.
- Greek Gift Sacrifice
- The bishop sacrifice on h7 or h2 to expose a castled king, usually requiring knight and queen support.
- Hanging a Piece
- Beginner slang for leaving a piece unprotected so it can be captured for free.
- Hanging Piece
- A piece that can be taken immediately, usually because it is undefended or not defended enough.
- Hedgehog
- A solid defensive structure, often with pawns on e6, d6, b6, and a6, that prepares counterplay later.
- Hole
- A square that can no longer be controlled by enemy pawns, often becoming a permanent outpost or tactical launch pad.
- Hook Mate
- A rook-and-knight mate where the knight controls the escape squares while the rook delivers the final check.
- Hope Chess
- Playing a move because you hope the opponent misses the threat instead of calculating their best reply.
- Hypermodernism
- Controlling the center from a distance with pieces rather than occupying it immediately with pawns.
- Illegal Move
- A move not permitted by the rules, such as moving the king into check. Online it is blocked; over the board it can incur penalties.
- Imbalance
- Any meaningful difference between the two sides, such as pawn structure, bishops versus knights, space, king safety, or material.
- In-Between Check
- A checking zwischenzug that interrupts the expected sequence before recapturing, defending, or finishing the tactic.
- In-Between Move
- A forcing move inserted before the obvious recapture or reply. Also known as a zwischenzug or intermezzo.
- Increment
- Time added to your clock after each move, such as 10 seconds per move.
- Initiative
- The ability to make threats that force the opponent to respond. Tactical initiative often matters more than temporary material.
- Insufficient Material
- A draw when neither side has enough material to force checkmate, such as king versus king.
- Interference
- Placing a piece between two enemy pieces to cut off a line of defence, attack, or communication.
- Intermediate Move
- A move inserted before the natural continuation. It is the plain-English version of zwischenzug.
- Intermezzo
- Another name for zwischenzug: an in-between move that interrupts the obvious sequence with a more forcing move.
- International Master (IM)
- A strong FIDE title below Grandmaster.
- Iron Tigran
- A popular nickname for Tigran Petrosian, famed for nearly impenetrable defence and prophylaxis.
- Isolated Pawn (IQP)
- A pawn with no friendly pawn on adjacent files, often a long-term target but sometimes a source of activity.
- J'adoube
- French for I adjust. Said before adjusting a piece to avoid touch-move issues.
- Karpov, Anatoly
- The 12th World Champion. Master of prophylaxis and positional restriction.
- Kasparov, Garry
- The 13th World Champion. Aggressive, dynamic style and deep opening preparation.
- Key Square
- A critical square in a pawn endgame; if your king occupies it, the pawn can often promote.
- Kibitzer
- A spectator who offers unsolicited advice or commentary.
- Kick
- Slang for attacking an advanced enemy piece with a pawn to force it to move away.
- Kill Box Mate
- A rook contact mate where the queen supports the rook diagonally, forming a compact box around the trapped king.
- King
- The most important piece. If your king is checkmated, the game ends.
- King and Two Bishops Mate
- A basic checkmate where the king and bishop pair force the bare king to a corner and seal the final net.
- King and Two Knights Mate
- A final checkmate pattern with king and two knights, important because the mate can occur but cannot usually be forced against a bare king.
- King Hunt
- A forcing attack that drags the enemy king out of safety and chases it into mate or decisive loss.
- King Safety
- Keeping the king secure, usually through castling, sound pawn cover, and limiting open lines.
- King Safety Breakdown
- A tactical warning state where the pawn shield, escape squares, or defensive coordination around the king has been damaged.
- Kingside
- The half of the board where the king starts, covering the e, f, g, and h files.
- Knight
- A minor piece that moves in an L shape and can jump over pieces.
- Knight Fork
- A fork by a knight, often hitting king and queen or queen and rook.
- Kramnik, Vladimir
- The 14th World Champion. Famous for the Berlin Defence and deep positional understanding.
- L Rule
- A beginner mnemonic for the knight move: two squares in one direction, then one to the side.
- Ladder Mate
- Also called lawnmower mate or rook roll mate, this uses two major pieces to push the king to the edge one rank or file at a time.
- Lasker, Emanuel
- The 2nd World Champion. Held the title for 27 years and pioneered psychological chess.
- Legal Move
- A move allowed by the rules. You cannot move into check or move a pinned piece if it exposes your king.
- Legal's Mate
- A classic queen-sacrifice opening trap where a pinned knight moves and the minor pieces deliver mate.
- Light-Squared / Dark-Squared
- Refers to square colors and also to the bishops that live on those colors.
- Line Blocking
- Interfering with a rook, bishop, or queen line so a defender can no longer function.
- Line Opening
- A tactical operation that opens a file, rank, or diagonal for a rook, bishop, or queen.
- Liquidation
- A forcing sequence of exchanges that transforms the position into a clearer technical result.
- Lolli's Mate
- A queen-and-supporting-pawn mate where the queen lands on g7, g2, b7, or b2 while the pawn cage removes the king's escape.
- Long Diagonal
- The longest diagonals on the board: a1-h8 and h1-a8.
- Loose Piece
- An undefended piece that can become the target of a tactic. LPDO means loose pieces drop off.
- Lucena Position
- The classic building-a-bridge technique for winning rook-and-pawn endgames.
- Luft
- An escape square for the king, often made by moving a pawn. Luft prevents many back-rank tactics.
- Mad Rook
- A rook repeatedly gives itself up with checks or threats, often aiming at stalemate if captured.
- Major Piece
- Collective term for queens and rooks.
- Manoeuvre
- A short sequence that improves a piece until a tactic appears. Not all tactics are one-move shots.
- Maroczy Bind
- A pawn structure, often with pawns on c4 and e4, that cramps Black's counterplay.
- Mate
- Short for checkmate.
- Mate in 1
- A position where you can deliver checkmate on your very next move.
- Mate Threat
- A threat to deliver checkmate next move unless the opponent defends.
- Mating Net
- A coordinated setup that removes the king's escape squares and makes mate unavoidable.
- Material
- The pieces and pawns on the board and their values, often counted as P=1, N/B=3, R=5, and Q=9.
- Max Lange's Mate
- A queen-and-bishop mate where the queen gives the final check while the bishop protects the queen and seals the escape square.
- Mayet's Mate
- A rook-and-bishop corner mate where the rook attacks from h8 or a8 while the bishop protects it along the long diagonal.
- Megaknighting
- A modern internet meme term used jokingly online; not a classical chess concept.
- Middlegame
- The complex phase after development, where plans, tactics, and coordination decide games.
- Miniature
- A game lasting fewer than 25 moves.
- Minor Piece
- Collective term for bishops and knights.
- Minority Attack
- Advancing fewer pawns against a pawn majority to create a weakness, often in the Carlsbad structure.
- Mistake
- A bad move that worsens your position, but is not as instantly decisive as a blunder.
- Morphy's Mate
- A bishop-and-rook mate where the rook confines the king and the bishop delivers or supports the final check.
- Move-Order Trick
- A tactic that works because the moves are played in the right sequence; the same moves in the wrong order may fail.
- Multipurpose Move
- A move that solves one problem while creating another threat.
- Mysterious Rook Move
- A rook move to a closed file designed to discourage the opponent from opening it.
- Net
- A coordinated restriction pattern that traps a king or piece. Mating nets and trapping nets share the same logic.
- Norm
- A high-level tournament performance that counts toward a title such as IM or GM.
- Notation
- Writing down moves. Common symbols include x for capture, + for check, # for checkmate, O-O for short castling, and O-O-O for long castling.
- Novelty
- A new move in a known opening position, often marked with N in annotations.
- Octopus Knight
- A deeply anchored knight on the sixth rank that attacks key squares and paralyses the opponent.
- Open File
- A file with no pawns. Rooks love open files.
- Open File Tactic
- Using a file to invade with heavy pieces, often against a king or loose back-rank target.
- Opening
- The first phase of the game, usually focused on development, central control, and king safety.
- Opening Principles
- High-percentage guidelines: develop pieces, control the center, and safeguard the king.
- Opening Trap
- A forcing tactical sequence in the opening that punishes a natural but inaccurate move.
- Opera Box Mate
- A synonym for Opera Mate, the Morphy-style rook mate where the king is boxed in and the bishop protects the final checking square.
- Operatic Mate
- A Morphy-style mate with rook and bishop coordination, usually against an undeveloped king trapped on the back rank.
- Opposite-Colored Bishops
- Each side has one bishop, but they live on opposite colors. This can help an attacker in the middlegame but be drawish in endgames.
- Opposition
- A king-and-pawn concept where kings face each other and the side to move may have to give way.
- Outflanking
- A king manoeuvre that goes around the opposing king to win key squares.
- Outpost
- A secure square that cannot easily be challenged by enemy pawns, often used by a knight to create pressure or long-term control.
- Outpost Tactic
- Using a secure advanced square to create a concrete threat, fork, attack on loose pieces, or pressure against the enemy king.
- Outside Passed Pawn
- A passed pawn far from the main action that deflects the enemy king or pieces.
- Overextension
- A position where advanced pieces or pawns have outrun their support and become tactical targets.
- Overloading
- One defender is given too many tasks. The tactic succeeds by attacking one duty and exposing another.
- Overprotection
- Defending a strong point more times than necessary to increase control and flexibility.
- Overprotection Failure
- A position where a heavily protected point still collapses because the defenders are tied to other duties.
- Overworked Defender
- A defender that already has too many jobs. Once it is forced to choose, one target collapses.
- Passed Pawn
- A pawn with no enemy pawn in front of it on the same or adjacent files.
- Passed Pawn Tactic
- A tactic based on creating, supporting, or distracting with a passed pawn.
- Pattern Recognition
- Spotting familiar tactics and mates quickly without calculating everything from scratch.
- Patzer
- Slang for a weak player.
- Pawn
- The foot soldier. Typical value: 1.
- Pawn Break
- A pawn move intended to change the pawn structure, open lines, create targets, or free pieces.
- Pawn Breakthrough
- A pawn sacrifice sequence that creates a passed pawn in a locked structure.
- Pawn Chain
- A diagonal line of pawns protecting each other.
- Pawn Chain Undermining
- Attacking the base of a pawn chain rather than the head. This is a tactical and strategic crossover.
- Pawn Fork
- A pawn attacks two enemy pieces at once. Pawn forks are easy to miss because pawns look humble until they gain tempo.
- Pawn Island
- A group of connected pawns separated from other pawn groups by open files.
- Pawn Mate
- A checkmate where the humble pawn delivers the final blow while nearby pieces and pawns box in the king.
- Pawn Race
- A race between passed pawns where one tempo, check, or promotion tactic decides the result.
- Pawn Sacrifice
- Offering a pawn for time, lines, development, or initiative. Many attacks begin with a pawn sacrifice.
- Pawn Storm
- Advancing pawns toward the enemy king to open lines and weaken the pawn shield.
- Perpetual Check
- A repeating checking sequence that forces a draw when the king cannot escape the checks.
- Petrosian, Tigran
- The 9th World Champion. Iron Tigran was famous for prophylaxis and defence.
- Philidor Position
- A standard defensive setup to draw many rook-and-pawn endgames.
- Piece
- Usually means non-pawns: knight, bishop, rook, queen, and king.
- Piece Domination
- Controlling all escape squares of an enemy piece before attacking it directly.
- Piece Movement
- The rules governing how each chess piece moves.
- Piece Sacrifice
- Giving up a minor or major piece for concrete compensation such as mate, attack, or decisive material recovery.
- Pillsbury's Mate
- A rook-and-bishop mate where the rook checkmates the king and the bishop controls escape squares.
- Pin
- A piece is pinned when moving it would expose a more valuable piece or square behind it.
- Poisoned Pawn
- A pawn that appears free but cannot be taken safely because of a tactical reply.
- Positional Play
- Improving the position gradually through structure, squares, activity, and coordination rather than relying only on immediate tactics.
- Premove
- Entering a move during the opponent's turn in online chess.
- Promotion
- When a pawn reaches the last rank, it becomes a queen, rook, bishop, or knight.
- Promotion Tactic
- A tactic where the threat or act of promotion forces material gain, mate, or draw.
- Prophylactic Move
- A move made to prevent a specific tactical or strategic threat.
- Prophylaxis
- A preventive move that stops the opponent's idea before it becomes a tactic.
- Protected / Defended
- A piece is safe because if it is captured, you can usually recapture.
- Queen
- The most powerful piece. Typical value: 9.
- Queen Mate
- The basic king-and-queen checkmate: box the bare king, bring your king, avoid stalemate, and finish with a protected queen check.
- Queen Trade
- Exchanging queens, often to reduce attacking danger and simplify the position.
- Queening
- Promoting a pawn to a queen.
- Queening Tactic
- A practical promotion tactic where the opponent cannot stop a pawn from becoming a queen.
- Queenside
- Files a through d, the left side for White.
- Quiet Move
- A non-checking, non-capturing move that creates a decisive threat.
- Rainbow Mate
- A rare four-minor-piece mate where two bishops and two knights form a rainbow-like arc, with every minor piece helping seal the king.
- Rank
- A horizontal row of squares, numbered 1 to 8.
- Rapid Chess
- A time control longer than blitz, often 10 to 30 minutes per player.
- Rating
- A number indicating skill level, such as 1200.
- Relative Pin
- A pin against a valuable non-king target. Moving the pinned piece is legal but usually loses material.
- Removing the Defender
- Capturing, deflecting, or distracting the piece that guards the key target.
- Repeating Attack
- A forcing pattern where the same tactical mechanism repeats until material or mate appears.
- Refutation
- A clear demonstration that a move or plan is incorrect.
- Resignation
- Ending the game early by admitting defeat.
- Restriction
- Taking away the opponent's useful moves. Tactical restriction often prepares zugzwang, mate, or trapped pieces.
- Reti's Mate
- A famous bishop mate where the enemy king is trapped by its own pieces and the bishop is supported by a rook or queen.
- Romantic Chess
- 19th-century attacking, sacrificial chess.
- Rook
- A major piece that moves in straight lines. Typical value: 5.
- Rook Lift
- A rook manoeuvre, often to the third or fourth rank, to swing across and attack on the flank.
- Rook Mate
- The basic king-and-rook checkmate: box the bare king to the edge or corner, then mate with the rook while your king blocks escape squares.
- Rook Pawn
- The a- and h-pawns. They behave differently in endgames and are more prone to stalemate or fortress quirks.
- Rook Pawn Stalemate
- A defensive drawing idea where the stronger side cannot avoid stalemate or wrong-corner problems.
- Royal Fork
- A fork involving the king and queen. Because the king must escape check first, the queen is usually lost next.
- Sacrifice
- Giving up material for attack, initiative, positional compensation, or a forced result.
- Sacrificial Attack
- An attack where material is invested to keep the enemy king under forcing pressure.
- Safety Check
- A quick scan to make sure your intended move does not allow a tactic. It is the last step before committing.
- Scholar's Mate
- A quick four-move checkmate idea targeting f7 or f2.
- Second
- An assistant or helper to a top player, often involved in training, analysis, and preparation.
- Semi-Closed Game
- A position type where the center is partially blocked; play often revolves around pawn breaks and manoeuvring.
- Semi-Open File
- A file with opponent pawns but none of your own. Rooks often work well on semi-open files.
- Seventh Rank Mate
- A mate on the seventh rank, often related to the Blind Swine pattern. Heavy pieces trap the king from behind.
- Sharp
- A risky tactical position where accuracy is critical.
- Shouldering
- Using the king to block the opposing king's route. It can be tactical in pawn races.
- Silent Move
- Another name for a quiet move, often used in composed or spectacular tactical positions.
- Simplification
- Forced trades used to reduce danger, convert an advantage, or enter a winning endgame.
- Simplify
- Trading pieces to reduce danger and reach a favorable endgame.
- Simul
- A simultaneous exhibition where a strong player plays many opponents at once.
- Skewer
- A reverse pin where the valuable piece is attacked first and must move, exposing the less valuable piece behind it.
- Smothered Mate
- A knight mate where the king is trapped by its own pieces.
- Smyslov, Vasily
- The 7th World Champion. Famous for harmony and endgame technique.
- Sofia Rules
- Tournament rules that restrict early draw offers to encourage fighting chess.
- Sound Sacrifice
- A sacrifice that works by force or produces enough objective compensation.
- Space
- Territory and mobility: the squares your pawns and pieces control. More space often means more room to manoeuvre.
- Space Advantage Tactic
- Using extra space to switch pieces quickly or restrict the defender's replies.
- Spassky, Boris
- The 10th World Champion. A universal player.
- Spite Check
- A pointless check by a losing player that delays the game but does not change the outcome.
- Square
- One of the 64 spaces on the chessboard.
- Stalemate
- A draw where the player to move has no legal moves but is not in check.
- Stalemate Trick
- A defensive resource where the losing side gives up legal moves and survives because the king is not in check.
- Stamma's Mate
- A rare king-and-knight endgame mate where an advanced rook pawn traps the defender's king and makes the knight mate possible.
- Steinitz, Wilhelm
- The 1st World Champion. Father of modern positional chess theory.
- Stem Game
- The original game that introduced or popularized a specific opening variation.
- Strategy
- Long-term planning based on pawn structure, weak squares, piece activity, and king safety.
- Suffocation Mate
- A knight checkmate where piece control cuts off the king's escape routes and leaves the king confined.
- Swallow's Tail Mate
- A queen mate where the queen checks along a rank or file while nearby pieces block the king's escape squares.
- Swiss System
- Tournament format where players with similar scores face each other each round.
- Swindle
- A resource from a lost position that tricks the opponent into allowing a draw or even losing.
- Switch of Attack
- Moving the attack from one flank, file, or target to another when the defence is overloaded.
- Switchback
- A piece returns to a previous square with tactical effect. It often appears in studies and advanced combinations.
- Symmetry
- When Black mirrors White's structure or moves.
- Tabiya
- A standard, important opening position that commonly arises and is heavily studied.
- Tactical Alertness
- The habit of checking forcing moves and threats before playing a natural move.
- Tactical Default
- An automatic move or habit that may be punished tactically if played without checking the position.
- Tactical Liability
- A feature that can be exploited tactically, such as a loose piece, exposed king, overloaded defender, or weak back rank.
- Tactical Recapture
- A recapture that is delayed, avoided, or transformed because a stronger forcing move exists first.
- Tactical Trap
- A tempting line that fails to a hidden tactic. Good traps still make chess sense if declined.
- Tactics
- Short-term forcing sequences such as forks, pins, skewers, sacrifices, and mates for immediate gain.
- Tal, Mikhail
- The 8th World Champion. The Magician from Riga was famed for intuitive sacrifices.
- Tempo
- A unit of time in chess. Many tactics win because they gain a tempo with check, threat, or attack on a higher-value target.
- Tempo Reserve
- A spare pawn move or manoeuvre that lets a player choose the move order in a zugzwang battle.
- Theoretical Draw
- An endgame known to be drawn with perfect play.
- Threat
- A move or idea that will cause damage if ignored.
- Threefold Repetition
- A draw can be claimed if the exact same position occurs three times with the same player to move.
- Time Control
- Rules governing how much time each player has and whether there is increment or delay.
- Time Trouble
- Having very little time left, often leading to blunders.
- Touch-Move Rule
- In over-the-board play, if you deliberately touch a piece you must move it if legal.
- Trade
- Swapping pieces of roughly equal value to simplify or change the position.
- Transfer
- Re-routing a piece to a decisive attacking or defensive square with tempo or threat.
- Transposition
- Reaching the same position by a different move order.
- Trap
- A sequence designed to provoke an error that loses material or leads to mate.
- Trapped Minor Piece
- A bishop or knight that has no safe retreat squares and can be won by precise attacks.
- Trapping
- Restricting an enemy piece until it has no safe squares and must be lost.
- Trapping / Domination
- Restricting an enemy piece until it has no safe squares, often by controlling its escape routes before attacking it directly.
- Triangle Mate
- A queen-and-rook mate where the queen is supported by a rook on the same file, forming a triangle around a blocked or edge-bound king.
- Triangulation
- A king manoeuvre used to lose a tempo and force the opponent to move into zugzwang.
- Undefended Piece
- A piece with no protection from another unit. Undefended pieces are magnets for forks, pins, discovered attacks, and zwischenzugs.
- Undermining
- Attacking the base or support of a strong point. Remove the support and the front structure collapses.
- Underpromotion
- Promoting to a knight, rook, or bishop instead of a queen, usually for mate, fork, or stalemate avoidance.
- Unsound Sacrifice
- A sacrifice that looks attractive but fails to concrete defence.
- Vacated Square
- A square made available by moving a piece away. The tactic appears when a stronger piece can use the vacated square immediately.
- Variation
- A specific line of play, either an opening line or a calculated line you analyse in your head.
- Vukovic's Mate
- A protected-rook mate on the edge of the board where a knight covers the king's remaining escape squares.
- Vulnerable King
- A king lacking pawn cover or exposed to open lines and diagonals, making tactics more likely.
- Waiting Move
- A move that passes the burden to the opponent without changing the main structure, often creating zugzwang or improving timing.
- Weak Square Exploitation
- Using a square the opponent can no longer defend with pawns. Many tactics grow from weak squares near the king.
- Weakness
- A pawn, square, or structural feature that is hard to defend and can become a long-term target.
- White
- The player who moves first. The pieces are usually light-colored.
- Windmill
- A repeated discovered-check mechanism that wins material move after move. The classic pattern uses a rook and bishop.
- Wing
- The flanks of the board, meaning the kingside and queenside.
- Winning on Time
- Winning because the opponent's clock reaches zero.
- Woodpusher
- Slang for a weak or planless player.
- Wrong Bishop
- A rook-pawn ending idea where the bishop controls the wrong promotion colour, often allowing a draw.
- X-Ray Attack
- Pressure through an intervening piece onto a target behind it. X-rays explain why queens, rooks, and bishops can be dangerous even when apparently blocked.
- X-Ray Defense
- A defensive resource where a queen, rook, or bishop protects another unit through an intervening piece.
- Yates Variation
- A named sub-line associated with Frederick Yates. The exact move order depends on the opening, but older opening books and databases may use the name.
- Yugoslav Attack
- A sharp attacking setup against the Sicilian Dragon where White plays Be3, f3, Qd2, and often castles long to launch a kingside pawn storm.
- Zugzwang
- A position where any legal move worsens the player's position. It is especially important in endgames.
- Zwischenzug
- An in-between move played before the expected recapture or reply. It works by inserting a stronger check, capture, or threat.
Common Questions & Terminology Myths
Before diving into the full A–Z list, here are clear answers to the most frequently searched chess rules, common community myths, and terminology questions.
Internet Slang & Fake Terms
Is fawango a real chess term?
No, fawango is not a real chess term; it is a fabricated slang word popularized by internet memes and social media jokes. Classical chess literature and official tournament rules do not recognize this word in any capacity. Click the Chess Slang & Culture Glossary card below to explore genuine modern chess community terminology.
What is the wooden shield in chess?
The wooden shield is an internet myth and not a recognized defensive concept in classical chess strategy. Real defensive play relies on established techniques like blockades, prophylaxis, and solid pawn structures. Use the strategy category filter below to review authentic defensive terms utilized by grandmasters.
Is frost a word used in chess?
No, frost is not a standard chess term and has no official meaning in chess strategy, tactics, or notation. It is likely a misunderstanding of other terms or a spillover from video game terminology. Browse the A-Z dictionary below to learn the actual vocabulary required to understand chess commentary.
Is pound a chess move?
Pound is not a chess move, though beginners sometimes confuse the hashtag symbol (#) used in algebraic notation for a pound sign. In official chess notation, the # symbol exclusively denotes a checkmate. Use the Rules/General filter below to explore how checkmates, checks, and captures are properly recorded.
Is jump a chess term?
Jump is not the correct terminology for standard piece movement, though it is often used informally to describe how the knight moves. The knight is the only piece legally permitted to leap over other pieces to reach its destination square. Select the Beginners filter below to review the precise legal movement mechanics for every piece.
Is straight a chess word?
Straight is not a formal chess term, though rooks and queens are said to move in straight lines along files (vertically) and ranks (horizontally). The correct technical terms for these directional movements are rank, file, and diagonal. Explore the board terminology in the A-Z list below to master proper positional language.
Is plain a chess term?
Plain is not a term used in chess. You may be thinking of a plain or level position, which grandmasters refer to as an equal position or a dead draw where neither side possesses a tangible advantage. Check the Endgame category filter below to see terminology related to balanced and drawn positions.
Is mark a term used in chess?
Mark is not a standard chess term, though players sometimes use the phrase mark a square to mean controlling or targeting a specific sector of the board. The proper strategic term for this concept is square control or space advantage. Select the Strategy filter below to discover how grandmasters articulate board control.
Is rich a chess word?
While not a formal technical rule, chess commentators frequently describe a position as rich when it contains vast tactical complications and strategic possibilities. A rich position usually features unbalanced material or asymmetrical pawn structures. Use the Tactics filter below to explore the vocabulary used to describe complex, dynamic board states.
Checking & Checkmate Rules
Can a king check another king in chess?
No, a king can never place another king in check or move to an adjacent square. This fundamental rule ensures neither king can step into a targeted square, meaning they must always remain at least one square apart. Use the category filter below and select Rules/General to explore essential endgame regulations and legal move definitions.
How do you kill the king in chess?
You do not physically kill or capture the king in standard chess; instead, you trap it in a position called checkmate. Once checkmate is delivered, the king is under inescapable attack, and the game ends immediately without the piece leaving the board. Explore the Tactics category using the glossary filters below to learn common checkmate patterns.
What happens if you capture the king in chess?
It is physically impossible to capture the king in a legal game of chess because the game ends the moment checkmate is achieved. If a player accidentally leaves their king in check or makes an illegal move, the arbiter resets the position or awards a penalty rather than allowing the king to be removed. Browse the Rules/General section below for tournament regulations regarding illegal moves.
Can a king put a king in check?
A king cannot put an opposing king in check because moving close enough to attack the enemy king would simultaneously place the moving king into an illegal check. The concept of keeping kings separated by one square is known as the opposition. Select the Endgames filter below to study how to use the opposition to your advantage.
What is the diagonal corridor mate?
The diagonal corridor mate is a tactical pattern where a king is trapped along a long diagonal and checkmated by a bishop or queen, often with the king's escape squares blocked by its own pawns. It is visually similar to a back-rank mate but executed on a diagonal axis. Use the Tactics filter below to uncover other geometric checkmating concepts.
What does back rank mate mean?
A back rank mate occurs when a king is trapped behind its own shield of pawns on the first or eighth rank and is checkmated horizontally by an enemy rook or queen. It is one of the most common tactical oversights among club players. Click the Tactics filter below to learn terms related to mating nets and king safety.
Can two bishops checkmate?
Yes, two bishops of opposite colors can force a checkmate against a lone enemy king, provided they work together alongside their own king to drive the opponent into a corner. This is a required technical endgame that every tournament player must master. Explore the Endgames filter below to review the terminology associated with basic mates.
Capturing & Piece Movement
Is capture a real term used in chess?
Yes, capture is the official terminology for taking an opponent's piece and removing it from the board. Unlike in checkers, a capturing chess piece lands directly on the occupied square to complete the capture, rather than leaping over the target. Browse the A-Z glossary below to compare the exact rules for capturing with different pieces.
Do you jump over pieces in chess?
You do not jump over pieces when making standard captures in chess; the only piece legally allowed to jump over occupied squares is the knight. All other pieces must have a clear path of empty squares to reach their destination or capture an enemy piece. Select the Beginners filter below to review how blockades and piece mobility work.
What does the term pawn mean in chess?
A pawn is the most numerous piece on the chessboard, representing the infantry, and is the only piece that captures diagonally while moving forward straight. Despite being worth only one point, pawn structures form the backbone of chess strategy. Select the Beginners filter in the menu below to study more foundational piece definitions.
What are the pawns in chess called?
Pawns are individually called pawns, but collectively they are referred to by their structural formations, such as isolated pawns, passed pawns, backward pawns, or pawn islands. Mastering these structural names is vital for positional understanding. Use the Strategy category filter below to decode the language of pawn structures.
How many spaces can a queen move in chess?
The queen can move any number of unoccupied spaces in a straight line horizontally, vertically, or diagonally. It is the most powerful piece on the board, combining the movement capabilities of both a rook and a bishop. Browse the Rules/General category below to confirm the precise movement limitations of all major pieces.
What does O-O mean in chess?
The notation O-O indicates kingside castling, where the king moves two squares toward the rook, and the rook jumps over to the adjacent square. This is a critical defensive maneuver used to safeguard the king and activate the rook early in the game. Use the Rules/General glossary filter below to review the exact legal requirements for executing a valid castle.
What is an en passant capture?
En passant is a special pawn capture that can only occur when an opponent moves a pawn two squares forward and lands directly adjacent to your pawn. You may capture that enemy pawn as if it had only moved one square, but this unique right must be exercised immediately on your very next turn. Jump to the E section in the A-Z bar below to read the full technical rule.
General Terminology & Rules
What does Re1+ mean in chess notation?
In chess notation, Re1+ means that a rook moves to the e1 square and places the opposing king in check. The uppercase R denotes the rook, the e1 dictates the destination square, and the plus sign indicates the check. Use the Rules/General category filter below to master the symbols required for reading annotated games.
What is the 75-move rule in chess?
The 75-move rule dictates that an arbiter must declare a game a draw if 75 consecutive moves have been played by both sides without a pawn being moved or any piece being captured. This prevents games from continuing indefinitely when neither side is making progress. Scroll to the numbers section of the A-Z list below for more rule-based definitions.
What is a blunder in chess?
A blunder is a catastrophic mistake that significantly worsens your position, usually resulting in the immediate loss of valuable material or allowing a forced checkmate. Blunders are denoted by two question marks (??) in chess notation. Select the Tactics filter below to explore common tactical oversights and how to describe them.
What is a gambit in chess?
A gambit is an opening strategy where a player intentionally sacrifices material, usually a pawn, in exchange for rapid piece development, central control, or a fierce attack. Gambits are designed to seize the initiative early in the game. Click the Chess Openings Glossary card below to discover the names of famous historical gambits.
What does tempo mean in chess?
A tempo in chess represents a single turn or a unit of time on the board. Gaining a tempo means developing a piece while forcing your opponent to react defensively, effectively giving you a free move to improve your position. Use the Strategy filter below to understand the vocabulary of time, space, and initiative.
What is a maneuver in chess?
A maneuver is a deliberate sequence of moves designed to reposition one or more pieces to superior squares, often without creating immediate tactical threats. Maneuvering is a core concept in closed, positional games. Click the Strategy category filter below to learn the terminology behind long-term positional planning.
What does hanging a piece mean?
Hanging a piece means leaving a piece undefended and vulnerable to a free capture by the opponent. In casual chess commentary, you will often hear this referred to as dropping a piece. Browse the Slang & Culture Glossary card below for more informal terms used by modern chess streamers.
What does tie break mean in chess?
A tie break is a system used to determine a single winner in a tournament when two or more players finish with the same number of total points. Common tie breaks involve playing faster time control games or calculating mathematical scores based on the strength of opponents faced. Click the Tournament Chess Glossary card below for competition terms.
Who is the GOAT of chess?
The title of Greatest of All Time (GOAT) in chess is widely debated, though most historians and grandmasters award the title to either Garry Kasparov or Magnus Carlsen due to their record-breaking ratings and decades of world championship dominance. Click the Famous Chess Players Glossary card below to review the terminology surrounding world champions.
Now that you’re equipped with chess terminology, use this glossary as a reference and return whenever a concept appears in your games.
Create a free ChessWorld account Back to Chess Topics