Know this. The Alapin Sicilian is a very dangerous system in the Sicilian with a lot of unexplored territory. Sometimes, it seems that there are tactical bombs at every turn. This game occurred in Czechoslovokia, 1990, and Black crushed his much higher rated opponent in a mere 16 moves.
If you play the Sicilian, you will have to defend the Alapin at one time or another. If you study this game, you will get an idea of what can happen.