Mega-Database is the largest and most renowned game collection in the world, in ChessBase quality standard. ChessBase published its first chess games database in 1986. In the meantime, "Mega" has grown to more than 11 million games and has become the reference for every ambitious chess player. With over 113,000 annotated games, Mega 2025 also contains the world's largest collection of high-class analysed games, master analyses, all completely classified.

Editing in ChessBase Quality Standard
Game collections have become indispensable for chess players. But in order to be able to use them meaningfully, meticulous time-consuming editing of the game data is necessary. The ChessBase data department has been doing this with the highest precision for 35 years.

Concentrated chess knowledge from 1475 to today
ChessBase Mega Database is concentrated chess knowledge. It contains everything - the entire history of chess, all major tournaments, all world championships, candidate tournaments and matches, chess Olympiads, national championships, leagues, etc., etc., etc. From 1475 until today.

In the meantime, the historical part, from 1475 to 1939, comprises about 75,000 games, over 6,000 of which are annotated. In the middle of the 19th century chess in Central Europe, especially in Vienna, experienced a rapid rise that was to last for several decades. The great tournaments of that time, with players like Steinitz, Reti, Tartakower, Schlechter, Spielmann and many others, can of course all be found in the Mega Database.

Direct access
The convenient menu gives you direct access to the most common applications: player preparation, annotated games, tournament search. But you also have direct access without loss of search time to the 1,000 most important tournaments: all World Championships, all Chess Olympiads, all Candidates Tournaments and important historical tournaments, and so on.

Always up to date
Best of all: Mega remains up-to-date all year round! With the Mega Update Service, week after week your database is updated, with over 5,000 new games. That's about 250,000 games by the end of the year.

Who is who in chess?
And what is the quickest way to find out all about your next opponents, or about top players: in the players encyclopaedia! Mega offers the encyclopaedia as a download with over 600,000 players’ data and 40,000 player photos. With the regular Mega updates you also get updates for the encyclopedia several times a year, so that it is always up to date on your hard drive.

The best combination: ChessBase + Mega!
To make use this collection of games, with the updates and the player encyclopaedia, you need a database program: ChessBase! Only with ChessBase can you manage these enormous game inventories sensibly, and extact the chess knowledge they contain. You can use it for opponent preparation, opening preparation, searching for motives, manoeuvres, printing games and diagrams, and much more.