Are these gambits dubious?

The first two are bad and the Evans is dubious.

Today even the Benko has some problems on the engine level. But at the same time the engines point out lots of new gambits, but generally a bit later in the game when all or most pieces have been developed.

The engines are okay with sacrificing material but they usually want more than just development for it. For example, a space advantage, an unchallenged bishop or the bishop pair.

Nothing dubious about the Evans at all. You must also keep in mind that you are not playing against an engine either. Most of the people here on lichess won't know the Evans more than 7 or 8 moves deep. It's a minefield, both the accepted and declined. In online time controls even 45 minute games it can be hard to navigate.

The Evans Gambit is certainly Not dubious in any way. As @Sarg0n said.

You can also see Kasparov--Anand, Eva's gambit in tournament play, 1995. Kasparov won in 25 moves in a nice miniature.

It's not winning, not losing.

https://lichess.org/study/9UdlbA5E/62h450Y2

@DonTomaso said in #11:

The first two are bad and the Evans is dubious.

Today even the Benko has some problems on the engine level. But at the same time the engines point out lots of new gambits, but generally a bit later in the game when all or most pieces have been developed.

The engines are okay with sacrificing material but they usually want more than just development for it. For example, a space advantage, an unchallenged bishop or the bishop pair.

Bunk and nonsense. Evans gambit is given a positive eval. by Stockish 14.

Basically it gives b4 as .1 less than the first choice. Compare with the London for example when Bf4 is usually .2 or .3 less than the best move. Kind of funny.

For the record #13 was a tournament game between Kasparov and Anand 1995. Anand resigns in the final position because it was lost. Garry Kimovitch (Kasparov) annotated this game in significant depth in several books.

@DonTomaso - you're not wrong, but I think you're maybe setting too high a standard for "not dubious" there! The current state of the Evans seems to be "pretty much level without too much work by black", but personally I wouldn't have said that you're properly into "dubious" territory as white unless there's a bit of a sense that you're playing with your fingers crossed because a well prepared black player is actually likely to end up with a decent advantage.

Dubiously engine level?

Stockfish 14 gives it as a plus for White.

What're you smoking?

In any case it doesn't matter much does it.

@RamblinDave
Yeah I forgot about marshall attack, and to be honest I haven't even heard of those other gambits.