sicilian defence Gardiner gambit.

i was looking at the sicilian defence and i came up with a gambit and it looks somewhat sound. i call it the Gardiner gambit (named after myself). here it is and i want to know if it's playable or not.

or the sicilian defence Gardiner gambit french variation:

what do you think?

Seems good. Also white has an option to transpose to Smith-Morra or take the pawn back.

Fully playable but not gives an advantage.

its not good against e6 but against d6 it will probably transpose into normal stuff if black is not greedy

apparently it's + 0.15 however most things lines say 5.Nxd4. still good though.

i beg to differ. Bc4 is not good against e6, after for example simple a6 or Qc7

it says +0.15 against 2... d6. i don't think it works against e6. i'll have a look.

 the engine says -0.04 if 2...e6. 

The drawback is that it keeps black's pawn on d4, which prevents white from playing Nc3.

This means that white no longer has his most natural move to defend the e4 pawn.

In the d6 line, after ...nf6 (hitting the e4 pawn), if white wants to defend his pawn, he'll have to play either nbd2 (putting the knight on a more constricted square), or Qxd4. If Qxd4 ...Nc6, white will have to spend a tempo moving the bishop again to b5 to pin the knight, or spend a tempo moving the queen again. Either way black's feeling comfortable, and gaining the initiative.

The e6 line is a bit tricker, but again, ...nf6 gives black a fighting game (if e5 then ...d5 and things get sharp. If Qe2 then ...nc6 and black's comfy).

It's certainly playable, but personally, I'd rather take the pawn and keep Nc3 as an option. Otherwise, ...nf6 and white has to go through contortions.

I wanted to show you that Black can very well equalize and even play for an advantage with natural moves