You missed a lot of options:
2.Nc3 - the start of the Closed Sicilian (3.g3), Grand Prix Attack (3.f4), Tiviakov Variation (2...Nc6 3.Bb5), Carlsen Variation (3.d4) or transposition to the Open Sicilian (3.Nf3 and 4.d4)
2.f4 - The McDonnell Attack, an inferior version of the Grand Prix Attack because of the Tal Gambit (2...d5! 3.exd5 Nf6!) White can try 3.Nc3, the Toilet Variation, but it is hardly an improvement.
2.Nf3 - This can lead to many possibilities. The Kings Indian Attack (2...e6 3.d3 - 3.d3 is vastly inferior against other 2nd moves because, like the Colle and Catalan, it relies on White dominating the light squares with the black bishop blocked by his own e-pawn - hence why the other case where the KIA is common, besides the 2...e6 Sicilian, is in the French Defense (1.e4 e6 2.d3 d5 3.Nd2 etc). The next possibility is 3.c3, Against 2...e6 or 2...Nc6, it is a direct transposition to 2.c3. After 2...d6, it is a totally different ball of wax due to tactics involving checking the Black King. It is in no way superior to the Alapin, just different problems must be avoided by Black. The next are the lines with 3.Bb5. Those are the Moscow Variation (2...d6 3.Bb5+) and the Rossolimo (2...Nc6 3.Bb5), the latter of which is said to be the best for White out of all the Anti-Sicilians. Then there is 3.d4, leading to the Open Sicilian, which is White's best response, and the sole reason I retired from the Sicilian in 2014 and switched to the Petroff as my backup to the French in 2014 as and as my primary weapon in 2024.
As a Vienna player, one that typically prefers open positions more than an Italian or Ruy Lopez player, the Open Sicilian is your best option. Your Ruy Lopez or Italian player might do better with the Rossalimo against 2...Nc6 and the Open Sicilian against 2...d6 or 2...e6, avoiding the Sveshnikov Sicilian.
Hi
I like the Vienna opening for white, but which of the following would be good to deal with Sicilian by black?
a3, b3 or Alapin (c3)? unless I missed something (which is entirely possible) :-) Thanks