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."

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."

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

GM Maxime Vachier Lagrave: "I grew up when ChessBase was almost the only web site for chess, and it helped me to follow tournaments, when I was a kid. Of course I still use the software."

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."

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

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

GM Le Quang Liem: "ChessBase is amazing, great software for chess players. It has changed the way chess players prepare and study chess – a very good thing for us."

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 Teimour Radjabov: "I have been using CBM for a long time and it is very useful, because you can see all the recent games, annotated by the best players in the world."

GM Rustam Kasimdzhanov: "Nowadays I don’t know a single chess player, amateur or 2800, that does not use ChessBase, and for good reason."

Leontxo García - es un periodista deportivo especializado en ajedrez: "Mi trabajo diario como periodista de El País sería imposible sin ChessBase".

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."