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A text format for exchanging chess games with headers, moves, comments, variations, and a result.

A descriptive PGN data unit containing a tag name and a quoted text value inside square brackets.

The mandatory ordered set of seven PGN tags identifying a game's basic descriptive data.

The section of a PGN game containing moves, move numbers, optional annotations, and a final game-result marker.

PGN rules for inserting free text inside braces or from a semicolon to the end of a line.

A Recursive Annotation Variation is a parenthesized alternative line that may contain further nested variations.

A PGN code made of a dollar sign and number that stores a brief judgment about a move or position.

A convention placing structured instructions in the form [%command parameter] inside a braced PGN comment.

The flexible PGN profile that lets a reader accept and normalize hand-prepared games or formatting variations.

The strict, canonical PGN profile for generating exchangeable and archival games with predictable text formatting.

A minimal PGN export subset for storing many games without comments, variations, or numeric annotations.

The registered media type identifying PGN chess-game data when systems exchange it.

A compact system created to record the placement of pieces in a chess position.

A six-field text line that lets software or a person reconstruct the state of a chess position.

The empty square recorded after a two-square pawn advance to represent a possible en passant capture.

A one-line format that describes a position and can attach structured operations for chess software.

A data unit appended to an EPD position using an operation name, optional values, and a final semicolon.

A numeric code summarizing the material in a position without showing where the pieces stand.

A system that consistently assigns a number from 0 to 959 to every legal Chess960 starting position.

A FEN extension identifying Chess960 castling rights through letters for the eligible rooks' starting board columns.

An extension of FEN that accurately represents Chess960 positions and castling rights.

A ChessBase file family storing a working game database across several components sharing one base name.

A compressed ChessBase archive that gathers the components of a CBH database into one package.

Scid's native database format, using coordinated files for indexes, game content, and names.

A specialized language for describing chess patterns and finding the games or studies that contain them.

A structured text format for exchanging tournament data such as players, pairings, results, and standings.

A binary format that maps opening positions to candidate moves, weights, and learning data.

ChessBase's native format for storing an opening book as a coordinated set of files.

A New In Chess opening-classification system using descriptive letters and numbers to identify families and variations.

Precomputed databases that give exact outcomes and progress information for endgames with up to seven pieces.

Endgame databases for up to five pieces that store exact results and distance-to-mate information.

A historic family of three- to six-piece endgame databases that provides exact distance-to-mate information.

Precomputed databases that provide exact results for endgame positions containing no more than seven pieces.