The inclusion of the CTG format is the headline feature for many. This is the native format used by the immensely popular ChessBase suite (Fritz, ChessBase 16/17, etc.).
Cut the .ctg and .ctb files. Paste them into:
Documents/ChessBase/Books/ (Windows standard path).
The HIARCS 15q Opening Book is a high-performance chess resource released in September 2024. It is designed for serious players and engine enthusiasts who require the latest theoretical updates and refined move recommendations. Key Technical Specifications Release Date: September 2024. Total Positions: 32,028,077. Variations: 1,875,832.
Data Sources: Based on a high-quality mix of Grandmaster (GM) over-the-board games, elite correspondence matches, and strong computer-analyzed lines. Format Support
The "repack" typically includes multiple formats to ensure compatibility across different chess software platforms:
CTG (.ctg): The standard proprietary format for ChessBase and Fritz GUIs.
HCS (.hcs): Native format for the HIARCS Chess Explorer Pro and original HIARCS engines.
HBG (.hbg): Optimized for HIARCS Chess on mobile devices like iPhone and iPad. Performance Benefits
Elo Gains: HIARCS books are renowned for improving engine performance, with an average strength increase of 40 Elo points per year. chess hiarcs 15q openings book includes ctg and repack
Human-Like Preparation: Unlike pure engine books, the 15q release balances top-tier computer theory with human playability, making it suitable for both opening training and high-level competition.
Quarterly Updates: HIARCS follows a mid-month update schedule (March, June, September, December), ensuring it captures the newest variations from international tournaments.
Are you planning to use this book for correspondence play or for training within a specific GUI like ChessBase? Chess Openings: Book Access and CTG Downloads
In the world of digital chess, the gap between a Grandmaster and a club player has never been smaller. The reason? Advanced chess engines and, more importantly, high-quality opening books. While engines like Stockfish or Komodo calculate tactical explosions with superhuman precision, they are lost without a roadmap for the first 10–15 moves. That roadmap is the opening book.
Enter the Chess Hiarcs 15Q Openings Book. For seasoned online players, correspondence enthusiasts, and Chessbase users, this name carries significant weight. But what makes the "15Q" version special? Why are the terms "includes CTG" and "Repack" crucial to your chess improvement?
This article breaks down everything you need to know about this legendary opening database, how to install it, and why it remains a gold standard for competitive play.
The release of the HIARCS 15q openings book is a welcome update for the computer chess community. By providing the book in CTG format alongside a versatile Repack, the developers have ensured that almost every user, regardless of their preferred chess interface, can benefit from this high-quality theoretical work.
If you are looking to upgrade your engine’s opening repertoire or simply want to analyze the latest theory with a trusted guide, this is a must-have download. The inclusion of the CTG format is the
Have you tried the new HIARCS 15q book? Let us know your favorite lines to test in the comments below!
The Chess Hiarcs 15Q Openings Book is not the newest product on the shelf, but it represents a high-water mark in "human-guided computer preparation." The fact that the community continues to repack and share the CTG files speaks volumes.
For the practical player, this book offers:
If you own ChessBase or Fritz, downloading a verified Hiarcs 15Q CTG Repack is the single best investment of zero dollars (or a small fee) you can make for your opening repertoire.
Final Tip: Pair Hiarcs 15Q with a weekly review of current TWIC (The Week in Chess) PGNs. Let the CTG handle the classics; let your own analysis handle the novelties. That is the formula for a 2000+ rating.
Keywords used: Chess Hiarcs 15Q Openings Book includes CTG and repack, Hiarcs 15Q review, CTG chess book installation, best chess opening books for Fritz.
HIARCS 15q opening book is a quarterly update released in September 2024
as part of the HIARCS Tournament Chess Opening Book series. It is designed for high-level competitive play, offering a significant Elo advantage over standard or free books. HIARCS Chess Software Key Features & Formats In the world of digital chess, the gap
The 15q update includes the following formats and specifications: CTG Format
: A proprietary ChessBase format compatible with popular GUIs like , Fritz, and Aquarium. HBG Format : Specifically for use with HIARCS on iPhone and iPad. HCS Format
: 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
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
folder. The HIARCS engine will automatically recognize and prioritize the latest named book in that directory. Password Protection
: 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
For customers of HCE Pro, Fritz and ChessBase products we recommend the HIARCS Tournament Chess Opening Book in CTG, HCS formats. HIARCS Chess Software HIARCS Tournament Book CTG Downloads: 1 Year
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
They are the strongest available opening books and are at least 100 Elo stronger than the free chess opening books hosted here. HIARCS Chess Software Chess Openings: Book Access and CTG Downloads