Chess Informant symbol system

The Chess Informant system replaces many recurring phrases with short signs. A reader can recognize an assessment without sharing the annotator's language. The symbols do not form a complete sentence; they are an editorial vocabulary read together with a move, position, or variation.

What it can express

• A judgment about a move, such as “better is” or “only move.”
• One side's activity, such as an attack, initiative, counterplay, or compensation for material.
• A positional feature, such as center control, a file, a diagonal, or a pawn structure.

These signs comment on the chess, but they do not replace notation that records legal moves. In Portable Game Notation (PGN), a text format for exchanging games, many comments are stored as Numeric Annotation Glyphs (NAGs): a dollar sign followed by a number. The original specification assigns meanings through $139; Chess Informant and software projects have proposed later values whose visual rendering is not always consistent.

Unicode, the digital character standard, encoded several specialized glyphs so they can be stored as real text. Even so, a font may lack them or an application may prefer a historical shape. It helps to separate three layers: the chess concept, the stored NAG number, and the character displayed on screen.