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

How to Play the Sicilian Dragon Main Ideas & Traps (Example Games)

Sicilian Defence, Pin Variation: Based on Free GM Lecture

Sicilian Defense: Kalashnikov Variation with GM Misa Pap

Sicilian Defense: The Chelyabinsk Variation

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

Sicilian Defense Four Knights Variation - GM Miloš Perunović

Middlegame Strategy Request] What can be done as black playing the Sicilian defense against a long castle? I find myself losing in this position to players rated much lower than me

Ideas for black in this position from the sicilian defense? (Black to move) : r/chess

Sicilian Defense: Old Sicilian Variation

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!).