what is the most agressive opening /

I was wondering what is regarded as the most agressive opening which is played at a master level ?

Kings Gambit perhaps or R Lupez ?

I

From the title,I had expected to say "Here, and only here, I will support the Spike and/or Grob fans"

However, with your master level pre-condition, (to be fair to the above fans, a master does occasionally experiment with such) I would say variants of one of several openings are good candidates.  2 knights, fried liver still had some fans for black, so white sometimes gets it.  Willes Barre, if black wants to be the aggressor.  Latvian is still sometimes seen for black.  Several Guicco Piano variants for white are still sometimes seen at strong levels, etc.  Clearly e4 is the most "opening" move. By which I mean, both the kings bishop and queen have strong diagonals available.  In other words, an elaborate "I don't know'

Of the two you list above I must say the King's Gambit is more aggressive as you are sacrificing a pawn for the initiative and attacking chances as white.

I prefer English opening as white.

Cheers

Sorry ,what I meant was what is the  most aggressive white opening played at high level.

I almost exclusively play the English but am now looking for something a bit more "in your face"......

d4 then c4 nf3 nc3

Two gambits I like which involve the same two first moves against the most common responses are The Danish and the Smith Mora. Both begin with e4. If the opponent responds with e5, then d4 begins the Danish. If the opponent responds with c5 (the Sicillian), then d5 begins the Smith-Mora. Both are very aggressive gambits, so I'd suggest studying some common lines before trying them out.

The Queen's Gambit Declined Semi-Slav Botvinnik is probably up there: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4. In one game, Ivanchuk sacrificed his queen against Shirov, and went on to win.

The Ruy Lopez is fairly tame, and the Fried Liver and Wilkes Barre aren't played much at the master level.  The Danish and Smith-Morra gambits are a little more common, but if black knows what he is doing, he can usually equalize.  The King's Gambit can be quite aggressive.  A lot of Sicilians are pretty sharp: the English attack in the Najdorf, Yugoslav Dragon, etc.

 Strangely enough, despite white's first move, black sometimes has more to say about what opening system the game ends up in.  Sure, white can choose from e4 or d4 or c4, but black has a huge amount to say from there.  You can prep white side of the Sicilian all you want, but if black wont play c5 you just never get there.   I think its easier to prepare a repertoire as black as you limit white's choices with every move. 

As white, I would say e4 is a bit more aggressive than d4, which in general leads to more positional play.  You can find both sharp and positional openings on both sides of the board, but on the whole e4 tends more toward an open attacking game.

I am not sure what the most aggressive opening is but the most aggressive ending was when Irina Krush (I think) slammed the pieces on the floor after losing to the chess queen (was that who she lost to?)

One word....the Scotch. Game.

The English is definitely not aggresive.

If 1. e4 is met by c5 (the Sicilian), yes - you can try 2. d4 (the Smith-Morra) which is dynamic... But, I recommend 2. b4 (a wing gambit) for real untred waters and a fun game -- if you wanna sac a pawn.

To me, "aggressive" is something that you play where the opponent knows right away that you're playing to win. The opposite of "aggressive" would be 1.e4 e6 2.d4 d5 3.exd5, which announces to the opponent "I'm happy playing a symmetrical position where I have much smaller chances to lose compared with an asymmetrical position."

So - against the Sicilian, I think the regular Nf3, d4 announces the desire to play for a win. I've heard that 2.c3 does not say this, even if it does annoy _some_ Sicilian players.

Against 1.e4 e5, I suppose that 2.f4 might be one way to announce your intention to play for a win.

In the Sicilian, 2. f4 is met by 2. ... d5!, and now it is black playing for the win!!!

Yes, indeed.

I'd say the most aggressive opening's would be the Bird's and the Dutch. Of course, virtually no masters (if any) play the Bird's. A few do play the Dutch though.

To me, the Bird says "I didn't want to spend time learning 1.e4 or 1.d4 so I chose this over the English because I also don't play the Sicilian."

The Dutch - yes, this one says "I want to win this game".

1.e4 e5 2.Ke2 announces to the opponent that they should resign, rather than go through the Bongcloud minefield.

1.e4 d5 2.exd5 Qxd5 3.Ke2 is even better for announcing your intention to play for a non-draw.

To me, the Bird says, "Woops!  I grabbed the wrong pawn by mistake.  Is it too late to say 'J'adoube?'"