All 1d6 Opening Repertoire Collection (6 Digital DVDs)

ChessBase 15: The new fast reference search

Chess Opening Database - Shredder Chess

ChessDB - chess database software - LinuxLinks

ChessDB - a free Chess Database

learning - Where can I find free training tools like detailed annotated chess openings, middle games and endgames in the PGN format? - Chess Stack Exchange

Openingmaster - biggest chess database ♟️ Official FIDE EDU Partner

Master Chess Openings, Chess Wiki

Does the win/draw/loss rate from the opening database also apply to lower rated games? - Chess Forums

Chessify on X: Chess databases offer you multiple benefits - opening stats, game search, opponent info - and Chessify offers the biggest online database with weekly updates coming automatically. 😉 You will

The most common opening in master games (according to chess.com's database) is surprisingly the Open Sicilian, with e4 c6 being almost 3x more popular than e4 e5. : r/chess