HIARCS Chess Software for PC Windows, Apple Mac and iPhone/iPad Opening Books
World Championship winning computer chess software program & downloads for chess database, analysis & play on PC, Mac and iPhone

HIARCS Home Online Book Access Tournament Book Free Opening Books

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HIARCS Chess Opening Books

The World's strongest and widest range of computer chess opening books¹.
Suitable for all players from beginners to the World Chess Champion
Platform: PC Windows, Mac OS X, iPhone/iPad
mid December 2021 updates now available

Human Reference book 54,773,992 positions/moves, 2,333,587 variations based on 1,887,809 high quality human games
GM++ top human chess book:
25,613,185 positions/moves, 1,099,766 variations based on 961,996
GM human games
Tournament CTG book with 29,465,051
positions/moves and 1,813,194 variations based on 1,777,433 top quality games

"I subscribe to your Powerbook now and I'm pretty impressed by it, I use it all the time in my chess teaching. As far as I know it is the best publicly available book."
Larry Kaufman, Grandmaster and World Senior Chess Champion.

[New!]Opening Book Sale extended, don't miss out


Background

Each HIARCS chess product comes with its own digital 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 books.

For many years HIARCS has had the strongest opening book available and it keeps getting stronger with every quarterly release. We even supplied the HIARCS tournament chess opening book to help World Chess Champion, Vishy Anand's team prepare for his recent World Championship match in which he was so successful.

We now find our book is sought after by many of world's strongest human players for both over the board and correspondence play - an essential resource for the serious chess player.

For customers of HIARCS Chess Explorer we recommend the Online Access to HIARCS Chess Opening Books from HIARCS Chess Explorer

For customers of Chessbase we recommend the HIARCS Tournament Chess Opening Book in CTG, HCS formats

The following table explains the different HIARCS opening books available and in what package they can be found. Click the underlined links to view the products in more detail.

Opening book Based on Positions Accessed using Available in product Location format
Local book Grandmaster over the board games 900,000 HIARCS Chess Explorer HIARCS Chess Explorer (Mac & PC) Local (included with Chess Explorer) HBS
GM Grandmaster over the board games 2,121,620 HIARCS Chess Explorer HIARCS Chess Explorer (Mac & PC) Online FHBS
GM+ Grandmaster over the board and correspondence games 4,350,244 HIARCS Chess Explorer Deep HIARCS Chess Explorer (Mac & PC) Online FHBS
Hiarcs14b (engine) Strong human and computer games 7,359,978 (moves only, no statistics) HIARCS 14 and Deep HIARCS 14 chess engines HIARCS 14 engines or HIARCS Chess Explorer (Mac & PC) Local (included with Chess Explorer) HCS
H-Reference
(Dec 2021)

 

All known human master games 54,065,531 HIARCS Chess Explorer Online Tournament Book Access Subscription

AND

HIARCS Chess Opening Subscription

Online FHBS
GM++ Reference
(Dec 2021)

 

Grandmaster and Elite correspondence games 24,880,981 HIARCS Chess Explorer Online Tournament Book Access Subscription

AND

HIARCS Chess Opening Subscription

Online FHBS
Tournament book
(Oct 2021)
Strong human and computer games 29,465,051 HIARCS Chess Explorer Online Tournament Book Access Subscription

AND

HIARCS Chess Opening Subscription

Online FHBS
Hiarcs14zj(Chessbase ctg) Strong human and computer games 29,465,051 Chessbase compatible GUIs, e.g. Chessbase, Fritz or Aquarium HIARCS Chess Opening Subscription Local (download book) CTG
Hiarcs14zj (13.487) (iPhone/iPad) Strong human and computer games 29,465,051 HIARCS Chess for iPhone or iPad HIARCS Chess Opening Subscription Local (download book) HBG
Hiarcs14z (zn) (engine hcs) Strong human and computer games 29,465,051(moves only, no statistics) HIARCS 14 and Deep HIARCS 14 chess engines HIARCS Chess Opening Subscription Local (download book) HCS

All books unless stated otherwise contain moves and detailed statistics including game results, Elo ratings, performances, year and play recommendations.

Purchase HIARCS Chess Explorer for a World class chess database, analysis and playing user interface, this includes the essential local and GM books (Deep HCE customers also get the GM+ book)

HIARCS Chess Explorer customers can subscribe to the Online Book Access Subscription a 1 year online access subscription to our Human Reference and Tournament books using HIARCS Chess Explorer.

Users of Chessbase software may be interested in our HIARCS Chess Opening Subscription a 1 year download subscription which includes the renowned HIARCS tournament book in multiple formats for use in Chessbase User Interfaces and allows online access to the Tournament and H-Reference book from HIARCS Chess Explorer.

Each book subscription includes quarterly updates to the books with the latest theory being played including new novelties. 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.

"I have tried the book in several configurations. Means in autoplayer, games at home, at FICS chess server and at playchess. I am very impressed. My feedback: This book is a masterpiece ! Congratulations" - Clemens (Dec 2010)

"I agree. Clearly a lot of work has been put into this book to provide strength in depth so the openings hold up in different time control games.
Excellent value for money in its own right but with a quarterly update ... just superb."
- PeterG (Dec 2010)

¹ Computer chess opening books contain positions, moves, statistics and play recommendations, they do not include games and textual comments.

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 © 1991-2020 Applied Computer Concepts Ltd. All rights reserved.

Acknowledgements

The HIARCS opening books are prepared and managed by Mark Uniacke.

Assistance is provided by Senior International Master Harvey Williamson and Computer Chess Expert Eric Hallsworth. Further input is provided by a number of top chess players and subscribers to the book. Thank you - your help enables a larger, stronger and better opening books.

THANK YOU!
 

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"generally I use HIARCS." - Five time World Chess Champion Vishy Anand, in a recent interview when asked what chess program he uses to analyse with
 
"HIARCS is much better positionally than Deep Blue." - Garry Kasparov 1997 (after game 5 of the rematch)

World Chess Champion, Vishy Anand, used "Powerful" HIARCS machine in preparations for his 2010 & 2012 world title matches

"This level of service is one other big reason to buy HIARCS." - John Jackson

† Highest performance reached depends on computer used. Computer Chess Software with world class chess engine playing strength.
HIARCS is designed and developed by Mark Uniacke in England.

*VAT and local sales tax may be applicable. Prices given in GBP, USD and EUR are subject to change without notice.
Other currencies are subject to conversion rates from GBP.

HIARCS is a trademark of Applied Computer Concepts Ltd. All other product trademarks acknowledged.
Copyright © 1991-2021 Applied Computer Concepts Ltd. All rights reserved.
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