Sicilian defence, 2: Paulsen variation

Sicilian Defense - A Total Guide (with White's Response)

Sicilian Defence, Pin Variation: Based on Free GM Lecture

Is the Sicilian french variation the best variation in the

Improve My Chess and Limitless Chess by GM Mesgen Amanov

Sicilian Defense - How to play, attack, and Counter the Sicilian?

opening lesson: sicilian defense accelerated dragon variation.. in

Sicilian Defense (introduction, ideas & variations) ⎸Chess Openings

Sicilian Defense Four Knights Variation

Counter All the Sicilian Sidelines - ChessMood

Why would White play 2.a3 as their 2nd move in the Sicilian Defense? It's not an accepted opening and I see no benefits. How would you go about strategizing a reply, as