Blitz Chess #358: Sicilian Defense, Pin variation

French Defense - 1. e4 e6 (Tarrasch, Winawer, Exchange, Advance, Classical) - PPQTY

B70 - Sicilian Defense, Dragon Variation

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

Chess: Sicilian Defence Variations: Sicilian Defense - Anderssen Variation - Pin Variation - Jaffe Variation

MAGNUS TRAP - Crushing the Sicilian Defense - Remote Chess Academy

Rossolimo Attack (Pin Variation) Sicilian Defense Theory

A Brilliant Miniature with Double Bishop Sacrifice.🔥 Sicilian Defense #Shorts in 2023

5 Best Chess Opening Traps in the Sicilian Defense Part-2, 💡 Register to GM Igor Smirnov's FREE Masterclass The Best Way to Improve at Chess INSTANTLY - 🔹

Powerful Chess Opening Against the Sicilian Defense, Tricky Wing Gambit, theory

Sicilian Defense Open Najdorf Variation Unique Gifts for Chess Players – VigaVictor