What is the more trapping line White can employ vs the Sicilian Defence?

The Smith - Morra gambit?

By trapping I mean a line even risky that if black isn't prepared and doesn't respond with accuracy is going to be trounched quickly , sort of equivalent of the King's gambit vs e5.

 Pardon my ignorance and thanks in advance for eventual answers 

The mainlines against most Sicilian variations seem pretty good for White.

Another gambit? you could try the Wing Gambit Deferred:

Definitely not the smith morra since B can simply play 4...Nf6 and traspose to a solid mainline alapin sicilian. The answer is simply the mainline open sicilian. W has the more active pieces and B needs to know what he is doing to avoid a quick knockout. 

The wing gambit is better than usually tought(it's probably good for equality) but not so forcing in the early moves; often the compensation is quite positional. By the way as far as i know the delayed wing gambit is considered less sound than the "normal" one.

Thank you guys ... It seems that against the Sicilian there are not shortcuts: you have to play the open Sicilian and study hard . Now I'm practising the Urusov  gambit vs e5, but I was wondering if there was something similar vs the semi-open defences in general and the Sicilian in particular.

thanks again

I also play(or at least used to) the ususov ;)

playing the open sicilian doesn't really means studying tons of theory, as always at amateur level is more important to understand the ideas and create a repertoire with common attacking themes against the many sicilian variations. For example i am trying to put togheter a sozin-slyle repertoire.

The smith-morra gambit is a good trappy line.  A lot of black players are kind of like a deer in the headlights when confronted with it, and it saves a lot of memorizing open sicilian theory.  You should know the c3 siciian to go with it, which comes up in the declined versions as mentioned above.  Most of the players will not decline it though, they will grab every pawn you throw out there.  If you like tactics, it's not a bad opening for white.  The wing gambit was successfully used by the world record blindfold simul phenomenon George Koltanowski. Of course, he was so good compared to most of his opponents that probably anything would have worked.  Venture into the open Sicilian? If you are brave and have a lot of time to study on your hands, but it is of course the best. Too good for me though!

 If you don't have the time to study the open Sicilian what is best IYO for a quick shot vs an unprepared foe? the Wing gambit or the Smith Morra?  Actually I'm playing the Wing because I want to adopt the Benko as the main defense against d4 but maybe SM is better ...

I think they are of  objectively similar value if prepared properly, but the smith morra is definitely more trappy. 

The problem is that preparing the smith morra properly would take you maybe thrice the time needed to  prepare a basic open repertoire. Why the open should take you any longer to prepare that a sideline? you just need to look at a couple of master games and give it a try. A few losses and then you will start scoring. You can play a trappy gambit if you want, it's a fully respectable decision. But do not think that you are going to save any time by doing this.

Just a couple fun traps I have found through my research in e4. How big and bad does that sicilian look now?

The rationale is that there are many open Sicilian lines and fewer Wing gambit lines and nobody even the Sicilians are 100% prepared vs the wing gambit but I got the message thank you guys

the wing gambit is a positional gambit similar to the benko, while the smith morra is more like the Goring gambit in double KP, quick and hard hitting.

I assure you that most sicilian players are far from 100% prepared on the open, maybe because at this level W mainly plays anti-sicilians!

And is not that true that there are more open sicilian lines; sure, more sicilian lines are known with a specific name and the lines go deeper, but in the early moves the wing gambit gives B much more freedom of action, so he can employ a wide range of defensive setups.

BTW, even if it's not the trappy line you were searching for, I quite like the wing gambit.

Indeed! I'm about a 1900 player OTB. In the last decade, I've played the Sicilian 88 times. 2.Nf3 occurred 54 times, so 34 times something else.

Then after my second move:

2...Nc6 (43x): 3.d4 happened 34 times

2...g6 (7x): 3.d4 happened 3 times

2...d6 (4x): 3.d4 happened 2 times

So only 39 out of 88 games went into the Open Sicilian.

And here is the kicker: my score with black in the Sicilian as a whole was 54.6% vs opponents averaging 1906, but against the Open I only scored 47.5%, against opponents averaging 1867!

I have a great score with the Sicilian, but almost only because of all the antis people play...

Replying to myself: I just found that my stats are misleading -- no less than 20 of the Antis were Morras, and I have a massive 75% score against it. That's probably plenty to explain the whole difference.

Just play something other than the Morra :-)

(I've never met the wing gambit and all I know about it is that I threaten Qe5+ after 1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5...)

I have been told that 5.Nf3 e5 6.c4! is supposed to give W sufficent compensation, but i'm really not an expert. There is an IM who used to play the wing gambit quite a lot in recent years, but i can't recall his name. His opinion was that the wing should lead to interesting = rather than =+ as generally tought. In the past quite a few strong players used to like the wing gambit (Alekhine said that "2.b4 is pawn sac for which W has sufficent positional reasons" and the young Keres played the deferred version quite a lot) but today the gambit has more or less fallen into oblivion.

 Actually there's a fun line with qe5+ and bg4  

but Black can play e5 instead of bg4 to deflect the knight of course ...

@kwaloffer so you're saying that the open is the real anti-Sicilian. Ok I'll try some gambit lines for fun and if I will get pounded I'll switch to the open.