What well known gambits are unsound?

You know, getting a theoretical position does not mean it is the strongest move.

1.d4 e5 2.e4?? is terrible (relatively speaking.. I'm sure it's equal), because white has such a good position after 2.dxe5, and the Center Game is just meh.

It might be a good thing to do in bullet though, or in a blitz tournament, especially if you know anything at all about the Center Game, because seriously who studies that thing?

But he isn't basically a full pawn up is his point.

I recently had White against the Elephant Gambit  1.e4  e5  2. Nf3  d5 and found that by the time I had barely got a good game-I was running out of time--it is a tough gambit to play against if you never experienced it before.

Albin Counter Gambit from a vote chess game which i participated in...

Albin Counter Gambit

ponz111  vs a stromg master

Here is an exhibition game vs the powerful TCCMB Team. The game was played on the internet and lasted about a year...

Dave Taylor  vs TCCMB Team

The TCCMB team specialized in the Albin Coounter Gambit and had just won from a strong master.

Here are some of the players on the team:

Steve Ham ICCF 2498   [he is now a grandmaster]

Mercian   IECC 2455

Karsten Fyhn  ICCF  2353

Santhosh M Paul  ICCF 2359

Gary Good  ICCF 2341

Here is another exhibition game played on the internet vs a strong correspondence master.  This game lasted approximately a year.

David C Taylor USA  vs  Kenneth M Reinhart  USA  correspondence

2004 test the  Latvian Gambit

I don't think this line is dangerous for Black. Probably a bit depressing to defend, but that's all.

Is the Goring Gambit sound?

 Here is one of the last USCF otb games I ever played:  US Open Chicago 1973

David Taylor vs GM Arthur Bisguier  [RIP]

well, the Englund gambit obviously isn't sound or good, but black will take back the pawn and if not then this nice trap will happen...

omega gambit

Silly game comments. 4.Bf4! is white's best move, not losing, and after 6.Nc3 (insted of the blunder 6.Bc3) Black is toast.

Exactly

HERE IS A LINE TOL PLAY AS BLACK VS TJHE SMITH MORRA GAMBIT

THE KING'S GAMBIT IS NOT VERY GOOD FOR WHITE IF BLACK FINDS THE CORRECT DEFENSE.

BLACK IS CLOSE TO WINNING.

The evaluation of the King's Gambit has changed [to lower] since this forum started.

Here is a good way for Black to get good chances vs the Danish Gambit. [it is pretty simple but rarely played]

The Albin Counter-Gambit

Almost all.