Guess the opening from the final position

Ok, so it's time to reveal the answer to this puzzle. The game is from 1960 and it's between Mikhail Tal and Gosta Stoltz, Tal being white. The opening is, as many guessed correctly, a Sicilian, so congratulations to everyone who got it right. you can see the game here: http://www.chessgames.com/perl/chessgame?gid=1139800

Should also say, since not everyone guessed correctly, that white is the winner in this game. Whilst it looks like black has a dominant position, he is unable to mate white's king, and once he does his best move, Qd3, his attack fizzles out and he's down in material, plus he's up against Tal, so, probably wisely, resigns.

Like wise.

A game from the 19th century played in London. Black wins, but what was the opening?