GM Dorian Rogozenko: "It is my deepest conviction that the Opening Encyclopedia is the best product around in the field of opening theory, improving your knowledge about the openings and helping you to become considerably stronger in practice."

GM Adrian Mikhalchishin: "I like CBM in different ways - as a reader, I prefer the Endgame Corner by Karsten Mueller - really well done. As a trainer, I use CBM Tactics to warm up my pupils, sometimes Opening Surveys, which are useful for certain openings and sometimes Strategy, the subjects of which are always instructive."

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GM Dorian Rogozenko: "The Opening Encyclopedia offers an ample and unique overview about the opening theory. In multiple videos and theoretical articles highly qualified trainers analyze and explain different opening variations and present them in a compact and easy-to-learn formats. Literary everyone, from beginners to Grandmasters, can find many ideas to expand their opening repertoire."

Anish Giri: „ChessBase is the software you really need. It is definitely essential and useful.“

GM Dorian Rogozenko: "ChessBase is an absolute must-have tool, whether you want to get to the top, or just improve your chess understanding at any level."

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GM Garry Kasparow (World Champion 1985-2000): "ChessBase is the greatest development for chess since the invention of the printing press."

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GM Daniel King: "ChessBase is essential for instant access to past games, allowing one to prepare new ideas for the future."

GM Dorian Rogozenko: "Whether you want to surprise your opponents with unexpected moves right from the beginning of the game, learn a complex theoretical variation, or understand the newest developments of the modern chess theory – the Opening Encyclopedia provides you with everything you need for that."