openingsgetal

Openingsgetal is a Dutch term that translates literally to “opening number.” It is used to refer to a numeric identifier associated with the opening phase of a process, a game, or a document. The exact meaning of openingsgetal is not standardized and depends on the context in which it is used.

In chess discussions, openingsgetal is sometimes used to describe the numeric component of the Encyclopaedia of Chess Openings (ECO) code. The ECO system assigns codes that combine a letter (A–E) with two digits (00–99) to categorize openings. In this usage, the digits function as the openingsgetal, helping to group and reference openings within a broad family.

Outside of chess, openingsgetal may appear in procedural or administrative settings as a shorthand for the initial stage’s numeric identifier, such as the first data point, milestone, or order code in a sequence. Because it is not a formal term with a universally fixed definition, the precise meaning should be clarified by the surrounding documentation or discussion.

See also

Encyclopaedia of Chess Openings, ECO code, opening (in chess), data labeling conventions.