What's so good about 3. Qxd4? Isn't Nc6 totally fine there? Winning a tempo? Or is my time away from Chess showing? I know I never had real problems with the Scotch as black except when I first started.
How to answer 1.e4 e5 2.d4?


Okay, maybe I should have asked GM "Game Knot" first, but I wanted to hear some of your opinions...
After 1 e4 e5 2 d4, 2...Nc6 transposes into the Nimzovich Defense. If White plays 3 Nf3, then 3...ed would probably lead to either a Scotch Game (4 Nd4) or a Scotch Gambit (4 c3).

I don't have any problem with Qxd4 Nc6, but I was wondering if there was a way to avoid White's king going out so fast, as my friend loves messing around with the Queen, as I tend to get annoyed and blunder. It's just something psychological.
I agree with Estragon here. 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 gives you an edge in development, and you can gain at least a tempo or two on him without too much problem.
Put another way, if he keeps messing around with his queen, you can probably bring your other pieces out while defending at the same time. Then it'll be his queen versus your developed army. Guess who has the edge there. ;P

I don't have any problem with Qxd4 Nc6, but I was wondering if there was a way to avoid White's king going out so fast, as my friend loves messing around with the Queen, as I tend to get annoyed and blunder. It's just something psychological.
The only way to avoid it would be to transpose to some really dodgy opening that would require you to know a bunch of tricks. You'd get in far worse situations than after 2...exd4 for sure.
2...d6 3.exd5 is probably ok for Black but not much fun... Neither is the Philidor if you don't know what to do. 2...Nc6 is a very dangerous line in the Nimzowich defence and it's really easy for White to get a good position. One example is the simple 3.dxe5 Nxe5 4.f4.
The best thing to do is to look at master games and see how they handle it. Not taking the pawn can only make things more difficult.
2...d6 is annoying. After 3.d5 I can't do Nc6, I can't get my Black-Squared Bishop out (my e5 pawn blocks him once the bishop is fianchettoed) and 3...f5?!, trying to get his pawn out of the way does not work...
I think I'll go along with exd4 (or with the Beyer, as rich suggested) and, with the help of GameKnot, I'll get to where I want
The Center Game has all but completely disappeared from high level GM games, after a brief resurgance a few years ago.
And the reason it disappeared is the line...
1.e4 e5 2.d4 exd 3.Qxd Nc6 4.Qe3 g6!
Pretty much the only compensation white has for expending the extra tempo on his queen early on is the chance to castle queenside, storm up the kingside, and plant his queen on g3 with a chance for a kingside attack. After 4...g6, not only will black be at least even...if not ahead...in development, but white has less than zero positional or strategic compensation.
Once it came to light in high level play, that line started scoring HUGE numbers for black, and completely wiped the Center Game off the map. Check out Nepomniachtchi's tries with the center game as white when black played this line in the 2005-2010 era. He literally scored like 0%. Those games should give you a good start as a guide on how to proceed.
The title says it all. I've got a friend who tends to play a lot 2.d4 after a King's pawn game. Right now I have not find a nice way to decline the pawn, and I don't like 2...exd4 3.Qxd4.
Any Idea that does NOT involve the Scandinavian, the French or the Sicilian? (If necessary, I'll swap to the Caro-Kann, but please not one of the 3 openings listed before!).
These are some of my first ideas, but I'm sure they are not correct, as I always end up with some small problems.