Free Chess Opening Book Downloads

Here are the free HIARCS Chess Opening Books. We will be updated periodically as new books are released. To access the latest and strongest HIARCS Chess Opening Books please purchase to our opening book update product.

HIARCS professional books in our chess opening book download product are many times larger with the latest human, correspondence and computer games. They are the strongest available opening books and are at least 100 Elo stronger than the free chess opening books hosted here.

Please note these books are free for you to download and use for your personal use only. Under no circumstances are the books to be hosted on another website without the prior express written permission of Applied Computer Concepts Ltd.

HIARCS Chess for iPhone & iPad

iPhone, iPod Touch or iPad customers can now download custom books from this page for their device. Book customers should refer to the customer download page for our full tournament book in HBG format.

To update the opening book on your device please follow these steps:

  1. From your desktop computer download the HBG format opening book below or from our customer pages
  2. Unzip the downloaded book onto your desktop making a note of its location
  3. Connect your iOS device to your computer
  4. Open finder and select your device from the Locations section on the left hand side of the Finder window
  5. With the device info show look to the right of General and click on Files (between Photos and Info)
  6. Click on the HIARCS Chess app in the list that is displayed
  7. You can now drag files from your desktop to the HIARCS Chess app on your device by dragging them to the Finder->Files->HIARCS Chess app view.
  8. Alternatively, you can also drag files using the Finder window from the HIARCS Chess app on your device to your desktop, for example to backup your PGN databases.
  9. Now in HIARCS Chess choose the HIARCS->Info & Updates menu item and tap Book update and HIARCS will read in the latest book.

You can see the book version number in the HIARCS: Info & Updates screen. HIARCS Chess will always use the latest book available in its Documents folder.

HIARCS 13.075 Book in HBG format (15.75Mb) - for use in HIARCS Chess on the iPhone or iPad
HIARCS Chess tournament book (medium edition) includes statistics from top quality games up to September 2014.
Download HIARCS 13.075 HBG Book

PC Windows

Customers who wish to use the CTG format book will need a GUI capable of reading this format, ie. Chessbase GUIs. Please save the book in your book folder. We strongly recommend that you "Optimize" the book in the Book options dialog so the tournament moves are chosen. The book is very wide even in tournament mode unlike most other books.

Please note for top performance in play you should allow HIARCS to use its own engine book which is included in the HIARCS installation and updated via the book access product. To ensure HIARCS is using its own engine book, you should turn off or unload any GUI books being used by the chess GUI you are using.