Is there a way to punish 1. d4 c6?

While choosing the Fantasy variation makes some sense and there are some elite players who try it occasionally, if Black knows you have a favorite line of the Fantasy they could play c6 to encourage you to play that precise line. 

I suspect the Fantasy variation isn’t a great repertoire choice for most people.

True, you can choose the Fantasy Caro-Kann but they might either play 2.e5 (like I do) or 2.Nf6 (which I'm yet to try) which transposes to the Caro-Kann Defence: Masi Variation which sounds completely uncommon and if 2.Nc3 then 2.d6 is a transposition to the Czech Pirc 

after d4 c6 e4 Nf6 e5 Nd5 Nf3 d6 it is a transposition to the Modern Variation of the Alekhine Defence

Why would you play h6 g5, that’s just bad

The modern is after e4 Nf6 e5 Nd5 d4 d6 Nf3 dxe5 

theres no c6

According to explorer database there's a Modern Variation of the Alekhine Defence with 4.c6 

that's the Modern I'm talking about 

Also , h6 and g5 both gains space on the kingside and can very well be used for a future kingside counterattack plus it makes the bishop on f4 look silly and have to move 

@ #48
Well, white just plays cd and if Nxd5, then white goes 3. Nf3 (essential, to stop 5. ...e5) and then 4. e4 and gets the centre.

There is no punishment of 1.d4 c6 but you have to be a Slav and Caro player. Also it is not a very good way to play for the full point.

What if your opponent plays 2.c3? Then you probably get a very boring symmetrical game.

The Slav is very aggressive, isn't it?

Then why do you think people play it?

I should have thought it's a super-aggressive response to d4-c4 and black plays it always to try to win?

QGD is a better try, since it actually unbalanced the position. 

I’d gladly move my bishop to have you loosen your kingside for no reason, thanks I guess

Slav can be tactical like the tarrasch. Not sure what the von Hennig thing is.

I've found out. No-one seems to play that against me.. Let's see, what would I do. I doubt I would play 4. cd. I imagine I might play 4. Nf3. Maybe they try to play it and I just do that. I like to stay in control with white.

I play Nf3 against the Benko too. There's not much point winning a pawn since whether white wins or not depends in any case on a central attack by white, most of the time.

I play dlugy (cxb5, f3) against benko. 

That sounds ok. I often end up with f3 but it's one of the many systems I've invented. After Nf3, which is a "useful waiting move", then depending on what black does, white usually plays either Nc3, Qc2 or a4. It's totally up to black and white just reacts. There are lines with an early b3. Obviously, it's important for white to  know what continuation to use. Qc2 is just a method of supporting e4 without there being a Nc3 for black to hit but if white plays it when it shouldn't be played, the lack of control over d4 could give black the better game.

I tried 4. f3 in the Nimzo-Indian in a recent Daily game. When our chess club was still functioning three or four years ago, a couple of high rated brothers were trying to get me to switch from 4. e3 to 4. f3. They said they both played it and that it would suit my aggressive style. I was sceptical but I finally decided to give it a whirl. I won very quickly but I won't play it again. My opponent could have equalised. Back to 4. e3 or maybe I'll play it if there's a safe way to transpose back into a 4. e3 variation. I haven't looked. Not easy to analyse using the chess.com analysis tool because it makes too many moves I wouldn't make. It's rubbish except for short range tactics.

play f4 (a risky move)