Ruy Lopez Opening, PDF, Chess Openings

Easy Guide to Ruy Lopez : John Emms : Free Download, Borrow, and Streaming : Internet Archive

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Chess - Ruy Lopez Opening - Apps on Google Play

Alburt, lev & dzindzichashvili & perelshteyn chess openings for black, explained (2005)

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This is a page from the book, Modern Chess Openings. How do I read and fully utilize these information? I cannot decipher how to use the table below. Thank you 🙂

Ruy Lopez: Morphy Defence: 3 A6, PDF, Traditional Games