The ChessBase Mega Database 2025 is the premiere chess database with over 11 million games from 1475 to 2024 in high quality. Packing more than 113,000 annotated games, Mega 2025 contains the world‘s largest collection of high-class analysed games. Train like a pro! Prepare for your opponents with ChessBase and the Mega Database 2025. Let grandmasters explain how to best handle your favorite variations, improve your repertoire and much more.