Manhattan Gambit: Destroying 3 Dutch Systems

The Dutch Defense is one of Black's sharpest lines against 1. d4, giving Black solid chances to fight over the center asymmetrically while undermining the e4 square. One of the most aggressive systems for the Dutch that I've been studying deeply is the Manhattan Gambit: Qd3.

And before you say anything, no, it's not a tourist trap in Times Square—but it'll leave your opponents just as uneasy!
In the opening, White will always gambit away the g-pawn after Qd3. 
After Black defends the pawn, White responds aggressively with 3. g4 regardless, and follows up with 4. h3.

Black has a couple of ways of responding to this opening. I'll be covering 3 setups:
1. The Classical Setup (e6)
2. The Leningrad (g6)
3. Stonewall (d5)

Classical Setup (e6)
In the Classical setup, Black reinforces the f-pawn with e6, while preparing to develop normally.
When Black fully accepts our gambit with g4 and h3, White captures with the knight, creating tensions along the kingside. The engine already evaluates the position (+1.3) as definitively uncomfortable for Black despite being a pawn up.

There's a trap in the Classical setup with ideas similar to the other two, but if Black happens to develop normally with a move like 5. Nf6, White delivers a killer attack with Ng5, putting catastrophic amounts of pressure.

The Leningrad (g6)
Black prepares to fianchetto their bishop and castle, with the idea of pushing the e-pawn in the future. We can continue with ideas to push g4, then h3. If Black continues their development with a move like Bg7, we get a similar position and the same patterns as before in the Classical setup.

White can use the same Ng5 ideas against Black here. Black doesn't have enough breathing space for its own king, creating significant positional weaknesses that White can effectively poke holes in. Regardless, White will play Ng5 when the opportunity arises.

Stonewall (d5)
By far one of Black's most solid variations of the Dutch... until the Manhattan Gambit is played.
In this variation, Black aims to create a big blockade of pawns with e6 and c6, effectively closing down the center.

Again, White will always use the same Ng5 ideas, which Black has a hard time defending. Often in this trap with the Stonewall, Black has some fighting chances with Bf5, but White will be up a bishop after the exchanges, as shown in the trap below.

Thanks for reading! This doesn’t cover everything in the gambit, and there are definitely more lines. I haven’t really tested this gambit much in real games yet, so take everything with a bit of caution, but from engines it looks quite sharp, especially if your opponent isn’t prepared for it. Either way, it's a good weapon that you can use against Black and to see how your opponents will react.
-Fluffycrepes