MNb wrote on 08/08/11 at 20:48:32:
Jupp53 wrote on 08/08/11 at 17:07:16:
exchanging a center pawn against a wing pawn and making the Nd4 to an object for a lot of black attacking patterns - can this be right???? For me it's too confusing.
You forget that White has the more active pieces. Learning how to use them to good effect is mandatory for chess improvement. So you should play 3.d4 for the same reason as for playing the Open Games.
Now Fromper is right that this applies to the Morra Gambit as well. Like him I scored heavily with it - until I began to meet opponents who knew how to handle it. At that stage proving sufficient compensation against all possible black defences became a lot of work ...
I didn't answer the previous post by Jupp, sorry. But Mnb has a good point. It is easier to win against strong opponents with equal material. I agree though, that the Smith-Morra might not be unsound, though it is not less work to make it work than the Open variations, as been stated here before.
Back to Jupp. Chess is a lot about trade-offs. In the Open Sicilian, White trades a center pawn and semi-open c-file for a well-placed knight and a semi-open d-file. This has nothing to do with how high rated you are IMO. It is chess education. Even if you play the Closed Sicilian, there will be times you want to play d4 anyway as White. The trick is to know when, and an understanding of Open variations will inevitably help you.
I wouldn't be so dogmatic in classifying Open games as a first must, compared to your mentioned alternatives. They form a good basis for chess understanding. But you should know how to play lots of different positions well, as well as all phases of the game. Many endgames will teach you how to play well in open positions, much better compared to several lines in the main line Spanish e.g.