Quick Course of Chess Openings

The Best Openings for Rapid Chess Improvement - Gautam Narula

learning - Where can I find free training tools like detailed annotated chess openings, middle games and endgames in the PGN format? - Chess Stack Exchange

Physics - Power laws in chess

Does the win/draw/loss rate from the opening database also apply to lower rated games? - Chess Forums

Chess Openings Pro - Apps on Google Play

Modern Chess Openings. Kings Indian Defence

Fundamentals of Chess Openings

Opening Encyclopaedia 2023

Quantifying the complexity and similarity of chess openings using online chess community data

Chess Openings for White, Explained: Winning with 1.e4, Second Revised and Updated Edition