Originally posted by curseknight
a) I know I'm back. I regret this.
b) The Sicilian is Black's best choice? Who says? In that case GMs would always play it!
Oh come on, you don't regret it. This is fun stuff. 🙂
smrex13 stated that the Sicilian is generally considered Black's best defense. I'm inferring that he meant against 1.e4, but I'm not sure of that. (I don't know if he was considering Black's performances of various defenses against non 1.e4 openings.) While I certainly can't prove that claim, I don't think I'd try to challenge the claim, either.
If you go to the online Shredder opening database and plug in 1.e4, you'll get a list of responses by Black and the corresponding win percentages. And 1...c5 has the best performance for Black. So who knows, smrex13 might be right. Of course, the Shredder opening database is only circumstantial - it's not proof.
One interesting note about the Shredder database. If you go to the starting position, you'll see that 1.c4, 1.d4, 1.g3, and 1.Nf3 all have better performances than 1.e4. 😲
Edit - Link added below.
http://www.shredderchess.com/online-chess/online-databases/opening-database.html