Anyone know of a good aggressive reply to the ...Sicilian and 1.d4, preferbly one that does not have too much theory?

Thanks,

Nate

against sicilian - 2.d4 followed by c3 gambiting a pawn.

against 1.d4 Benko Gambit or Kings Indian Defense.

seeing as i play sicilian and d4... OH WELL!!

against sicilian one of the most agressive is probably the grand prix attack. White plays 2. Nc3 3. f4! 4. (developing move Nf3 for example) and 5. Bc4!

against d4 i would recommend the King's Indian Defense which i also play. 1.. Nf6 2.. g6 3.. Bg7 4.. 0-0 5.. (normally d6). It is regarded as one of the most agressive systems in the whole of chess and a lot of nail bitingly close technical positions arise.

There is no such thing as a nontheory line in the sicilian.  The opening is too popular.  You might come up with an antisicilian that limits the amount needed but then you are not being aggressive.  So you need to learn a main line or compromise on the agression.  Even the Morra (1. e4 c5 2. d4...) has plenty of theory.

Against 1. d4 ... you have more choices but I have to ask what is "too much theory".  KID probably has too much theory and timing the break is tricky.  Dutch (1. d4 f5) might fit the bill.  More respectable would be the Nimzo (1. d4 Nf6 2. c4 e5 3. Nc3 Bb4) Bogo (3. Nf3 Bb4+) complex.

All very good info. No need to type anythng else.

Against the Sicilian, I would recommend the Closed.  Theory is not so important in the Closed.  The ideas are more predominant.  The Closed can lead to a simple and decisive kingside attack if Black doesn't look out.  Against d4, I would recommend the Modern Benoni.  The theory is very important, but ideas are also needed to play the Benoni effectively

Thanks Everyone!!

 As Carl said any open Sicilian you play will involve theory and a ton of work because you'll need a way to play against the Classical, Schevingnen, Dragon, Najdorf, Kalashnikov, Sveshinkov, the e6 Sicilians (Tamainaov, Kan).  You can use the English attack against the Najdorf and Schevinggnen I believe but you'll have to learn a different line against all the others.

So yes most folks who aren't professionals take up an Anti-Sicilian.  I play Bb5, it's more positional, not sharp, and I can't play it against 2...e6 set ups.  The c3 Sicilian looks pretty good, it leads to more open positions, but there are a few lines where the Queens come off early, so once again you have a not too lively game.

Against 1.d4 the Semi-Slav is pretty sharp in some lines, unless white plays an exchange variation, and then you are kind of stuck.  Look into the Dutch Leningrad, I tried but the ideas escape me.

I think the Morra Gambit (1. e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3) is great since it offers white some practice with the initiative. With black i play the sicilian and decline the gambit with 3...Nf6 4.Nf3 (or cxd4), transposing into an alapin sicilian, since fighting off white's initiative is quite hard especially OTB.

Against d4 try the Benko gambit