HIARCS Tournament Book CTG Downloads: 1 Year
World's Strongest and broadest chess opening books¹
Suitable for all players from beginners to the World Chess Champion
Platform: PC Windows, Mac OS, iPhone/iPad
Required: HIARCS Chess Explorer Pro, Chessbase GUI for CTG access or HIARCS Chess for iPad/iPhone
Latest update: Mid March 2025 includes latest human and computer theory analysed with unique play recommendations
Does not include online access via HIARCS Chess Explorer/Pro, see the HCE/Pro online access product here
Tournament CTG Book with 32,270,531 positions/moves and 1,894,759 variations based on 1,891,049 top quality games
Each HIARCS product comes with its own chess opening book with the latest chess opening theory at the time of the release of the particular product. However, many chess players need to remain up to date with the latest chess opening theory throughout the year and online chess engine players like to have the latest and strongest chess opening book.
"I subscribe to your Powerbook now and I'm pretty impressed by it, I use it all the time in my class teaching. As far as I know it is the best publicly available book." - Larry Kaufman, Grandmaster and World Senior Chess Champion
For many years HIARCS has had the strongest opening book available and it keeps getting stronger with every release. We even supplied the HIARCS tournament chess opening book to help World Chess Champion, Vishy Anand's team prepare for his World Championship matches.
We now find our book is sought after by many of world's strongest players and is an essential additional resource for the serious chess player.
The latest HIARCS tournament opening book is available in Chessbase CTG format (for PC), HIARCS' own HCS format for Mac and PC with regular updates for customers to the HIARCS Chess Opening Book CTG Access product. Improvements per year have averaged about 40 Elo points. Over the course of a year the opening book may contribute more to chess strength improvement than the increase in chess engine strength.
The HIARCS Tournament Chess Opening Book CTG Download offers the following:
- Latest HIARCS tournament chess opening book in CTG, HBG and HCS formats
- Quarterly updates usually in mid September, December, March and June - you will be informed about each update.
- Up to date with the latest chess opening theory
- Average improvement of 40 Elo per year
- Upon purchase you will receive a link and login details for downloading the latest HIARCS opening book and many previous opening books!
- Access lasts 1 year and is renewable (no auto renew)
- Emailed delivery and discounted renewal
The HIARCS tournament book is unbeaten in all book matches against other commercial books. It is the standard by which any other chess opening book should be measured.
Prices*: £37.49 / €44.95 / $49.95
Order 1 Year HIARCS Tournament Book CTG Access
| Book Release Date and Name | Positions | Variations |
|---|---|---|
| March 2025: Hiarcs15tBook | 32,270,531 | 1,894,759 |
| December 2024: Hiarcs15rBook | 32,081,267 | 1,881,792 |
| September 2024: Hiarcs15qBook | 32,028,077 | 1,875,832 |
| June 2024: Hiarcs15pBook | 31,747,976 | 1,857,872 |
| March 2024: Hiarcs15oBook | 31,397,311 | 1,833,692 |
| December 2023: Hiarcs15mBook | 31,157,316 | 1,818,856 |
| September 2023: Hiarcs15jBook | 34,469,699 | 2,040,450 |
| June 2023: Hiarcs15iBook | 35,768,257 | 2,120,477 |
| February 2023: Hiarcs15hBook | 35,328,859 | 2,176,516 |
| November 2022: Hiarcs15gBook | 34,901,500 | 2,146,514 |
| August 2022: Hiarcs15fBook | 33,448,168 | 2,043,808 |
| April 2022: Hiarcs15dBook | 32,736,668 | 2,002,736 |
| February 2022: Hiarcs15bBook | 30,604,733 | 1,895,525 |
| October 2021: Hiarcs14znBook | 29,465,051 | 1,813,194 |
| July 2021: Hiarcs14zmBook | 28,323,677 | 1,755,342 |
| April 2021: Hiarcs14zlBook | 28,039,830 | 1,617,579 |
| January 2021: Hiarcs14zkBook | 26,631,111 | 1,910,946 |
| October 2020: Hiarcs14zjBook | 25,412,066 | 1,950,470 |
| July 2020: Hiarcs14ziBook | 24,599,456 | 1,917,305 |
| April 2020: Hiarcs14zhBook | 24,273,151 | 1,901,315 |
| January 2020: Hiarcs14zgBook | 22,729,989 | 1,807,576 |
| October 2019: Hiarcs14zfBook | 22,462,112 | 1,793,343 |
| July 2019: Hiarcs14zeBook | 22,166,732 | 1,779,117 |
| April 2019: Hiarcs14zdBook | 21,929,403 | 1,767,391 |
| January 2019: Hiarcs14zcBook | 20,944,106 | 1,711,469 |
| October 2018: Hiarcs14zbBook | 19,195,301 | 1,533,133 |
| July 2018: Hiarcs14zaBook | 19,067,269 | 1,457,537 |
| April 2018: Hiarcs14zBook | 16,877,162 | 1,567,454 |
| January 2018: Hiarcs14yBook | 16,524,864 | 1,329,892 |
| October 2017: Hiarcs14xBook | 17,721,580 | 1,473,019 |
| July 2017: Hiarcs14wBook | 20,116,561 | 1,742,212 |
| April 2017: Hiarcs14vBook | 19,598,165 | 1,597,806 |
| February 2017: Hiarcs14uBook | 19,788,161 | 1,632,989 |
| December 2016: Hiarcs14tBook | 19,788,161 | 1,632,989 |
| September 2016: Hiarcs14sBook | 18,156,517 | 1,511,490 |
| June 2016: Hiarcs14rBook | 17,663,676 | 1,153,239 |
| March 2016: Hiarcs14qBook | 17,285,794 | 1,200,871 |
| December 2015: Hiarcs14pBook | 16,933,739 | 973,051 |
| September 2015: Hiarcs14oBook | 14,254,799 | 834,277 |
| June 2015: Hiarcs14nBook | 13,047,908 | 1,230,973 |
| March 2015: Hiarcs14mBook | 12,930,890 | 1,222,011 |
| December 2014: Hiarcs14lBook | 12,681,453 | 1,202,363 |
| September 2014: Hiarcs14kBook | 12,024,410 | 1,157,157 |
| June 2014: Hiarcs14jBook | 11,161,032 | 1,092,176 |
| March 2014: Hiarcs14iBook | 10,897,668 | 1,068,174 |
| December 2013: Hiarcs14hBook | 10,211,291 | 1,015,501 |
| September 2013: Hiarcs14gBook | 9,756,350 | 972,482 |
| June 2013: Hiarcs14fBook | 8,604,093 | 858,231 |
| March 2013: Hiarcs14eBook | 8,247,074 | 833,897 |
| December 2012: Hiarcs14dBook | 7,558,429 | 811,574 |
| September 2012: Hiarcs14cBook | 7,359,979 | 788,566 |
| June 2012: Hiarcs13jBook | 6,304,018 | 688,358 |
| March 2012: Hiarcs13iBook | 5,302,731 | 647,305 |
| December 2011: Hiarcs13hBook | 5,185,413 | 633,515 |
| September 2011: Hiarcs13gBook | 4,163,027 | 497,190 |
| June 2011: Hiarcs13fBook | 3,879,189 | 527,673 |
| March 2011: Hiarcs13eBook | 3,454,030 | 442,650 |
| December 2010: Hiarcs13dBook | 2,925,726 | 382,899 |
| September 2010: Hiarcs13cBook | 2,581,613 | 351,951 |
| June 2010: Hiarcs13bBook | 2,479,533 | 335,923 |
| May 2010: Hiarcs13aBook | 2,414,780 | 325,712 |
Please note the HIARCS opening books are for your personal use only. Under no circumstances are the books to used for commercial purposes, hosted on another website or used in official tournaments without the prior express written permission of Applied Computer Concepts Ltd. All HIARCS books are copyright © 1991-2024 Applied Computer Concepts Ltd. All rights reserved.
¹ Computer chess opening books contain positions, moves, statistics and play recommendations, they do not include games and textual comments.