Terms of use

You can use Chess Openings Lab freely to learn, teach and practice. Please don't copy the site wholesale, and remember it comes without any warranty.

Using the site

Everything is free for personal study and for clubs and classrooms, including printing your repertoire sheet. You may link to any page. The site is operated by Stellar Capital LLC.

The embeddable board

You may embed the board on your own site using the code on the embed page, as long as you keep the credit link it shows. Please don't scrape the site.

Content and accuracy

Moves are checked automatically and we fix confirmed errors quickly, but the site is provided as is, without warranties of any kind. Opening names and move orders are facts that belong to everyone; the text, board player and design are © Stellar Capital LLC. Data credits are on the about page.

Paid features

If a paid trainer plan is offered, its price, billing and cancellation terms will be shown before you pay, and you can cancel at any time.

Changes and contact

We may update these terms; the date below shows the latest version. Questions: hello@stellar.capital.

Updated October 2026.