How to defend against the Scandinavian Opening

I won't give any variations, but will list a few helpful ideas. This probably isn't the best way to play, but it gives you a nice position.
Play 2.dxc5 and take the pawn. If they offer another pawn right away, take it. If they don't recapture immediately, play nf3 and ignore
If the queen comes out and captures, play Nc3 and attack the queen.
If you get checked, block with the bishop. Then attack the queen if you can on the next move, then get the knights out to c3 and f3, and castle kingside
If the queen goes to a5, Play d4, then nf3, bd2 to x-ray the queen, and bc4. don't castle immediately, and look out for potential opportunities to jump with the knight on c3 and attack the queen
If the queen retreats on the d-file, play a similar piece setup, but with the queenside bishop on f4.
Generally you will castle kingside
If bg4 comes, if you have a bishop on c4, there might be a bxf7 and ne5 to win back the piece. If not, play h3, and then g4 if the bishop doesn't take.
Focus your play on where your opponent castles: Go for an attack if the king commits itself to castling, and focus on the centre if the king stays flexible in the centre.
Here is an example of how to play. Larsen as a Dane specialised in the Scandinavian Defence and he had previously won a game with it against Karpov. This time Karpov did not underestimate it:
https://www.chessgames.com/perl/chessgame?gid=1068315

I won't give any variations, but will list a few helpful ideas. This probably isn't the best way to play, but it gives you a nice position.
Play 2.dxc5 and take the pawn. If they offer another pawn right away, take it. If they don't recapture immediately, play nf3 and ignore
If the queen comes out and captures, play Nc3 and attack the queen.
If you get checked, block with the bishop. Then attack the queen if you can on the next move, then get the knights out to c3 and f3, and castle kingside
If the queen goes to a5, Play d4, then nf3, bd2 to x-ray the queen, and bc4. don't castle immediately, and look out for potential opportunities to jump with the knight on c3 and attack the queen
If the queen retreats on the d-file, play a similar piece setup, but with the queenside bishop on f4.
Generally you will castle kingside
If bg4 comes, if you have a bishop on c4, there might be a bxf7 and ne5 to win back the piece. If not, play h3, and then g4 if the bishop doesn't take.
Focus your play on where your opponent castles: Go for an attack if the king commits itself to castling, and focus on the centre if the king stays flexible in the centre.
completely agree
also 2...bg4 nf3 as given is bad
qxg4 obviously

Hi, I just wrote an article on my blog about the Scandinavian defence. I hope this might help
https://www.chess.com/blog/SharpCube/fighting-the-scandinavian-defense-with-3-qa5

At forst after e4 d5 take with exd5 now there are some.variations like if they play a gambit like c6 after that then take thw pawn then give the pawn back by pushing it if they dont take if u wanna annoy if they take the pawn on d5 with Qxd5 then Nc3 and anything they do is met by developing a piece unless they blunder queen on low elo if Nf6(modern variation then give the pawn back but dont push just ignore it and some.people do e4 d5 exd5 Nf6 Nc3 or Nf3 then they do e6 then just ignore the e6 pawn because it is a bad trade

1.e4 d5 and u think about how to defend?
Attack!
I was meaning generally how to play against it

I ignore what everyone says about the Scandinavian being bad (I don't like playing it as white) and throw all the players who play it for a loop with 2. d4
You have to study the lines yourself of course but I like the way the pieces get very active in the BDG. Technically it's refuted but I've yet to see someone play a refutation against me

Because its bad
ill accept tennison
decline bdg
also i dont play qxd5 opting for nf6 so b4 gambit doesnt apply

Because its bad
ill accept tennison
decline bdg
also i dont play qxd5 opting for nf6 so b4 gambit doesnt apply
Tennison gambit suggestion was humour man...
if you like endgames and also those reversed old indian/philidor positions you can play 2 d3. not much theory there too. lame but playable. otherwise play the main lines. you play 1 e4 to generally get an open game and for the most part that is what you get in the main line scandinavians so you shouldn't be complaining. if you didn't like being confronted so early you should have opted for some closed system without pawn tension for the first ten moves or so.

the way i play agaisnt it, is 3.nc3 4.g3, keeping the option of d3 or d4 open. This gives black no real targets and the queen ends up looking kind of silly. Some lines with early rb1 and b4 can also be very dangerous for black.
you can also try 2.nc3 if you like the positions after 2...d4 but black can try to force a scandinavian transposition via 2.dxe4 qxd5 3.qd5

i didnt get it
it seemed serious
oh well
Tennison is considered as crap, would u think a titled player would advocate it?
But I don't know why, in this forum, many threads about it...
Advocating BDG, or other gambits is certainly not very educative and informative, especially at OP's level.
Just develop your pieces and play a game : take the pawn, and develop, no need to tell more.