Chess Informant (Sahovski Informator) is a publishing company based in Belgrade, that periodically produces the book of the same name, as well as the Encyclopaedia of Chess Openings, Encyclopaedia of Chess Endings, Opening Monographs, other print publications, and software (including electronic editions of most print publications). Chess Informant published two issues per year in a period of 1966-1990 and three issues per year in a period of 1991-2011. Starting from 2012, Chess Informant is set to publishing schedule of four issues per year (March-June-September-December).