Most people interested in chess history know that Edward Winter's Chess Notes is located at ChessHistory.com. According to the introduction to the archive...
Chess Notes Archives
...it has been there since September 2004. The monthly archive indicates which C.N. items appeared in which months on the site. The same introduction informs that C.N. items:
- 1-1933 were published from 1982 through 1989 as a bimonthly periodical,
- 1934-2187 were in the form of a syndicated column,
- 2188-2486 appeared in 'New in Chess', and
- 2487-3414 appeared at ChessCafe.com.
The first of the endnotes to Winter's book 'Chess Explorations' gives more detailed information about the bimonthly periodical:
- 1982 : 1-291, 'Draw!' by W.Heidenfeld
- 1983 : 292-592, 'Paul Keres Chess Master Class' by I.Neishtadt
- 1984 : 593-871, 'The Oxford Companion to Chess' by D.Hooper and K.Whyld
- 1985 : 872-1071, 'Chess Curiosities' by T.Krabbé
- 1986 : 1072-1299, 'The Test of Time' by G.Kasparov
- 1987 : 1300-1521, 'Chess Personalia' by J.Gaige
- 1988 : 1522-1788,
- 1989 : 1789-1933, 'Johannes Zukertort, Artist of the Chessboard' by J.Adams
The same endnote informs that a Book of the Year award was given for most of the early years, and I've included the titles in the table. Winter's most recent note is C.N. 4839, dated 7 February 2007. Since the first bimonthly periodical was dated January - February 1982, it has been 25 years since C.N. no.1 appeared.