3...Qxd5!? a new move I found OTB and cannot find it in any chess books/databases.
I originally thought that this move must be dubious as nobody plays it, but as I worked alongside the computer Stockfish and went deeper into the tree of variations, I was amazed of how many tricky threats Black creates and playable positions Black has. I won't bore you with all the various lines (as this is available upon request), but will show you some of the main lines.
1.e4 e5 2.Nf3 d5!?
Proposed Main line (1)
3.Nxe5?! Bd6 4.d4 dxe4 5.Bc4 Bxe5 6.Qh5 Qe7 7.Qxe5 Qxe5 8.dxe5 Nc6 9.Nc3 Bf5 10.Bf4 Rd8 11.Rd1 Rxd1+ 12.Kxd1 Ng-e7 += The computer gives a slight edge for white, but when Black plays 13...Ng6 and 14...Ngxe5, it looks all to play for, and guess what? we aren't playing against a computer, and even computers make mistakes.
Position as below diagram.
Proposed Main line (2) as above diagram.
3.exd5 Qxd5!? 4.Nc3 Qe6 5.Bb5+ c6 6. Ba4 Qg6! 7.Qe2 Be7 8.d3 Nf6 9. 0-0 Bh3 10.Nh4 Qg4 11.Qxg4 Bxh4 += The computer gives a slight edge for white but it looks fairly equal OTB, after all the possibilities white must avoid playing as the below variations.
From main line if 5.d3 Nf6 6.Be3 Nc6 =
From main line if 7. Nxe5? Qxg2 8.Qf3 Qxf3 9.Nxf3 Bg4 -+ slight edge for Black due to whites broken pawn structure.
or 7.Nh4 Qg4 =
or 7.Rg1 Bg4 8.Nxe5 Bxd1 9.Nxg6 hxg6 10. Kxd1 Rxh2 =/unclear
As just a few of these lines show, its white who has to play accurate and not fall for the traps black sets.
In conclusion of this opening which I have done extensive analysis on, its a very playable opening. But first you must learn all the opening moves and variations to become successful with it.