This format is essential for users of the ChessBase and Fritz graphical user interfaces (GUIs). It allows the book to be loaded directly into these programs for deep opening study or engine testing.
If you are serious about opening preparation – whether for engine wars, correspondence chess, or online rapid – the is a must-have. The inclusion of both .CTG and .ABK formats alone justifies the price (typically $30–$50 USD). It bridges the gap between free, shallow books and expensive professional databases. Chess Hiarcs 15q Openings Book Includes Ctg And...
So, what actual openings are covered? Let’s look under the hood. This format is essential for users of the