TL;DR:

• 9.8 million chess games from OTB matches, tournaments, and correspondence games.
• Unified new search for Masters, Chess.com, and Lichess games.
• Overview pages are free, advanced stats available for subscribers.

A Comprehensive Database of 9.8 Million Chess Games

We are introducing a new database of over 9.8 million chess games, spanning over-the-board matches, tournaments, and correspondence games, featuring players ranging from amateurs to top professionals. The games were sourced from public repositories such as Lichess tournament broadcasts, The Week in Chess, and more than 20 other sources. In total, over 22 million PGNs were analyzed, resulting in nearly 10 million unique games after rigorous duplicate detection. The database also includes meta-information, like player ratings, directly sourced from FIDE.

Check out some examples:

• Magnus Carlsen
• Hikaru Nakamura
• Gukesh D

You can even merge players profiles with their online accounts. For example, the demo account of Hikaru Nakamura combines his two Chess.com accounts with his Masters profile for a unified view of his games.

Unified and Improved Search Across Databases

The search functionality has been completely revamped, enabling you to explore the Masters Database, Chess.com, and Lichess games all in a single unified search. Players can be found by their name, FIDE ID, or account name, with real-time suggestions appearing as you type. Check out the GIF below to see the new search in action!

Future Considerations & Outlook

The database is currently updated monthly, but we’re working to automate this process for more frequent updates in the future. Time controls (classical, blitz, etc.) are automatically inferred from games and events, but this information may be incomplete in some cases.

At present, the database includes only players with an official FIDE ID (or those who previously had one). We plan to expand support to include other rating systems, such as USCF, ICCF, and DWZ, in future updates.

Some limitations apply: While the player overview pages are freely accessible to everyone, detailed statistics are available exclusively to subscribers.

Other Changes in Recent Months

While this feature took significant time to develop, you may have noticed several usability improvements and minor updates across the platform, especially in the search functionality. Additionally, PGN uploads to private databases are now more robust, with improved flexibility in handling input, even accommodating certain types of invalid data.

We’re excited to see how the Masters database helps you prepare for matches and improve your chess. As always, we’d love to hear your feedback: Join us on Discord to share your thoughts and join the discussion!