If you had to pick ONE b4 or f4 !?

Which is also "refuted" by taking iy

You are welcome to prove it. Please, show us some forced continuation that leads to a big advantage for black.

Yes, because that means black has to play 1...f5 and follow up with 2...f4.

If you mean playing f5 on first or second move, it's no blunder but is a mistake since whites extra tempo matters. Take Daimianos defense, white can sac a knight and win but if white plays e4 e5 f3, black can't take advantage immediately even though he's equalized.

Slightly better for white

 bad, in terms of "there were better moves"

Yeah! Hear that IM pfren, who cares about being an International master, some 1200 rated troll from the internet thinks your wrong so it must be true.

You replied to a commenter some while ago that you have annotated games on li**ch.org that they can learn from. I forgot the exact thread. I sent you a pm asking what your username is. The intention was to view your games there and learn from them. But you didn't reply. I am not a troll. Beating your fist against your chess and accusing people of being a troll acomplishes nothing. I am a good person.

Yeah, your not a troll. But you are a 1200 rated patzer who just called an IMs opinion on an opening wrong.

Well, based on your ratings, I am sure you are a patzer too. I happen to look up to pfren.

Then don't disagree with him about something you clearly know nothing about at your level

definineitly f4 because if they try to play the froms gambit 1...e5, then you hit them with e4, transposing into the king's gambit, triggering your opponent.

But what if they wanted you to enter a KG? Then it's white who got played 

1.b4 - have played it about 250 times over the board.  Even drew 2200 and 2300 players with it at the 2014 US Open and drew a 2200 at the 2008 IS Open with wins against 2 1800s and a 2100.

Was my main White weapon on 2008, 2009, and 2014.  Now, I play it maybe once or twice a year over the board.

Of these two moves,1.f4 ofers a choice of viable setups (reversed Classical Dutch, reversed Leningrad Dutch, Stonewall, early b3 stuff and even early b4 against some move orders. After 1.b4, it is Black who has a lot of sensible choices on moves 2 and 3. So it's 1.f4 for me.

see that's exactly what I mean! From players like to play against the KG.

I love playing the King's Gambit. So I'd choose f4 and pray that my opponent plays the From Gambit against me (1... e5?!) so that I can play 2. e4 and transpose to a KG.

I'm perfectly fine with accepting the from's despite the fact that I don't score well against it.

1. b4 for sure unless you like to get mated a lot vs players better than you. I don't understand why people play French at all for this reason. As white vs French I just get to mate the king about 10x as often as facing other black openings. Why do they torment themselves?

I'm gonna wait for @Thrillerfan to go ham on that comment

I think I mate more when I have mate in one

whoaaaa

what's the russian lol