HIARCS Chess Explorer Online Book Access

World's Strongest and broadest chess opening books¹
Suitable for all players from beginners to the World Chess Champion
Massive references of over 114 million positions, moves and statistics with latest theory and play recommendations
Platform: HIARCS Chess Explorer for PC Windows or Apple Mac required to access books
Latest update: August 2022, 180th update

One year access to Tournament, GM++ and Human Reference books from HIARCS Chess Explorer Opening Explorer view
Human Reference book 55,698,541 positions/moves, 2,374,239 variations based on 1,917,030 high quality human games
GM++ top human chess book: 25,685,813 positions/moves, 1,100,414 variations based on 959,475 GM human games
Tournament CTG book with 33,448,168 positions/moves and 2,043,808 variations based on 1,874,732 top quality games

HIARCS Chess Explorer and HIARCS Chess Explorer Pro provides online access to GM opening books as standard. If you want to enhance this to have access to the World Strongest Chess Opening Book and a Human Reference of opening play this is the product for you. Many chess players need to remain up to date with the latest chess opening theory throughout the year and that is where our online book access product can help, giving you the latest and strongest opening book straight into the Opening Explorer view of your HIARCS Chess Explorer application.

"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 have even supplied the HIARCS tournament chess opening book to help many time World Chess Champion, Vishy Anand's team prepare for matches and tournaments.

The Online Book Access provides:

Prices*: £36.95 / €41.65 / $49.95
SALE 20% discount today £29.56 / €33.32 / $39.96
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¹ Computer opening books contain positions, moves, statistics and play recommendations, they do not include games and textual comments.

If you want to download the HIARCS tournament opening book in Chessbase CTG or HIARCS HCS format, you will need the HIARCS Tournament CTG Download product instead.

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 © 1991-2022 Applied Computer Concepts Ltd. All rights reserved.