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What are opening books?

Opening books are datasets that contain a selection of opening moves from various chess games.

Each opening book can be different depending on the person or organization that produces them.


GM Cheems supports the use of opening books and can integrate them into the analysis and auto-play.

Free Opening Books

While many opening books are paid, there are plenty that are free to use.

Although we don't produce any opening books, we have put together a collection of free opening books, which you can find and download from here: