: Open your ChessBase software (e.g., ChessBase 17 or '26) and log in. Use your serial number to activate the database and the weekly update service.
The is the latest edition of the world's largest collection of analyzed chess games, featuring over 11.7 million games spanning from 1475 to 2025. It includes more than 114,000 annotated games with commentary from grandmasters. Purchase and Download Options chessbase mega database download