Generally the idea is to prevent a Yugoslav attack by saving a tempo (d7-d5 in one move instead of two), giving Black better resources to deal with White's threats if he attempts to castle queensided and launch the kingside pawns. There are many ways for White to stumble into a totally lost position with one mistake in the early stages, due to the slight difference in move order from Black.
The give and take is that it allows White to play the Maroczy Bind, which clamps down positionally on Black. This is far from the end of the world of course, if you read up thoroughly on the concepts you need to know to improve your position in those lines. Some of those ideas are fairly advanced. Often you're positionally in trouble but there's some arcane tactic that saves your bacon. Such is life in the Sicilian. Such is life as Black in general, really.
Hi all
going to have a look at the accelerated dragon against 1.e4. Anyone help with understanding the opening and its aims/goals, and what to look out for.