The CTG format is the proprietary opening book format designed by ChessBase. It is the industry standard for chess software.
Whether you are running HIARCS 15 or other top UCI engines like Stockfish or Dragon, this book provides a robust theoretical foundation to ensure high-quality games right out of the gate.
Once you have obtained a legitimate copy of the book in CTG format, installation is straightforward, though a proper setup is essential. Here is a general guide:
The keyword is the most technically important part of this product. CTG is the proprietary format for ChessBase opening books (used by Fritz, Rybka, and many GUI interfaces).
Official HIARCS books are distributed as digital downloads for subscribers. A "repack" typically refers to a non-official bundled version, but the standard installation involves these steps: For CTG Files : In HIARCS Chess Explorer Pro, use the Book Explorer , click the Manage CTG books icon, and select the unzipped CTG files from your disk. For Engine Usage : Place the file into your designated chess hiarcs 15q openings book includes ctg and repack
In the context of chess software, a "repack" typically refers to a bundled version of the software that includes the engine, the graphical user interface (GUI), and additional resources like opening books in various formats.
Latest HIARCS tournament chess opening book in CTG, HBG and HCS formats. Prices*: £41.65 / €49.95 / $54.95. Positions. Variations. HIARCS Chess Software Chess Opening Books: Free Downloads
: Official downloads are often compressed in a zip file and require a password provided via purchase email. HIARCS Chess Forums optimize engine settings specifically for using the HIARCS 15 series books? Chess Openings: Book Access and CTG Downloads
It covers all major chess openings while providing deep, computer-verified novelties. The CTG format is the proprietary opening book
If you are still using the Hiarcs 14 book or a free online .bin book, .
The HIARCS Tournament book is known for being remarkably robust, frequently boasting that it is unbeaten in book-to-book matches against other top commercial offerings.
: The book is an essential resource for studying and keeping your repertoire up to date with Grandmaster-level theory. It has been used by top players like Vishy Anand for World Championship preparation, and it is widely considered the "best publicly available book" on the market.
The 15q edition is a massive compilation of chess opening knowledge. It blends: Once you have obtained a legitimate copy of
Right-click the book in the book window. Set the following for optimal performance:
Many free opening books come as BIN (Arena) or ABK (old Crafty) formats. By stating the repacker guarantees compatibility with the industry standard—ChessBase, Fritz, or the free ChessBase Reader. If you play on ICC, FICS, or Lichess via a GUI like Fritz, a CTG book is non-negotiable.
: A local format used directly by the HIARCS 15 series engines. Data Scope : The 15q version contains approximately 32,028,077 positions 1,875,832 variations HIARCS Chess Forums Installation and "Repack" Details
The remains an essential tool for serious chess study. By choosing a package that includes both the universal CTG format and a streamlined repack , you drastically cut down on configuration time, allowing you to dive straight into deep opening preparation. Combine this world-class book with a modern GUI, and you will possess a grandmaster-level opening repertoire right at your fingertips.
The is the industry standard created by ChessBase. It consists of three files: .ctg , .ctb , and .cto .