ECO Codes at
ECO (Encyclopedia of Chess Openngs)

How to Study Openings

How To Learn & Study Chess Openings – YouTube:

Best Openings to Play

Chess Openings TIER LIST Against 1.D4 | GM Moulthun Ly – YouTube:

Sicilian Defense

Sicilian Defences TIER LIST | Pros And Cons Of Each One | GM Molton – YouTube:

Anish Giri teaches the Sicilian Najdorf – YouTube:

Smith Morra Gambit Fans 8. Nd5 |
You Must Try This New Knight Sacrifice Variation – YouTube:

Modern Defense

The Modern Defense | Play the modern by Shirov with …c6 – YouTube: