Notation and standards
Games in PGN
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Portable Game Notation
Level: BasicA text format for exchanging chess games with headers, moves, comments, variations, and a result.
PGN tag pair
Level: IntermediateA descriptive PGN data unit containing a tag name and a quoted text value inside square brackets.
Seven Tag Roster
Level: IntermediateThe mandatory ordered set of seven PGN tags identifying a game's basic descriptive data.
PGN movetext
Level: IntermediateThe section of a PGN game containing moves, move numbers, optional annotations, and a final game-result marker.
PGN comment syntax
Level: IntermediatePGN rules for inserting free text inside braces or from a semicolon to the end of a line.
Recursive Annotation Variation
Level: IntermediateA Recursive Annotation Variation is a parenthesized alternative line that may contain further nested variations.
Numeric Annotation Glyph
Level: IntermediateA PGN code made of a dollar sign and number that stores a brief judgment about a move or position.
PGN embedded command
Level: AdvancedA convention placing structured instructions in the form [%command parameter] inside a braced PGN comment.
PGN import format
Level: AdvancedThe flexible PGN profile that lets a reader accept and normalize hand-prepared games or formatting variations.
PGN export format
Level: AdvancedThe strict, canonical PGN profile for generating exchangeable and archival games with predictable text formatting.
Reduced Export Format
Level: AdvancedA minimal PGN export subset for storing many games without comments, variations, or numeric annotations.
application/vnd.chess-pgn
Level: AdvancedThe registered media type identifying PGN chess-game data when systems exchange it.