Sicilian defence:old variation Chess openings part 1

File:Old Sicilian, Open, Accelerated Dragon Variation of the

B70 - Sicilian Defense, Dragon Variation

How to Beat the Sicilian Defense - EnthuZiastic

How to Play The Sicilian Defense: Levy, David N. L., O'Connell

Sicilian Defense in Chess Game Stock Photo - Image of pawn, board: 58943894

The Complete Sicilian I - Schachversand Niggemann

Sicilian Defense: Hyperaccelerated old variation : r/lichess

Vidit Gujrathi - When I was 12 years old, I developed a liking towards the Classical Variation of the Sicilian Defense. (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5. Nc3 Nc6!).

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

The Sicilian Dragon - David N.L. Levy 1976 Chess Digest SIGNED vintage – Postmarked from the Stars