user307: Just like the title says, is there a name for the line starting with 4.Ng5 in 1.e4 e5 2.Nf3 Nc6 3. Bc4 Nf6 4. Ng5 called?
Wikipedia article https://en.wikipedia.org/wiki/Two_Knights_Defense, does not give a name.
This Youtube video https://www.youtube.com/watch?v=rKoZkrBWDbU refers to 4.Ng5 as The Knight Attack, but I searched for it and I don't see other references to The Knight Attack.
Also, often people refer to 4.Ng5 as Fried Liver attack, which I believe is incorrect, since Fried Liver attack arises later in the game, after 1.e4 e5 2.Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7.

user25509: I think the name for 4. Ng5 is Knight Attack. There isn't a specific name, because it leads to more specific openings, like the Fried Liver Attack, Polerio Defense 4. Ng5 d5 5. exd5 Na5 (trying to prevent the sacrifice), the Traxler Countergambit 4. Ng5 Bc5, and more. It's just like how 1. e4 e5 is called the open game. There isn't a specific name for it, because it will lead to more specific opening.

307: <p>Just like the title says, is there a name for the line starting with 4.Ng5 in 1.e4 e5 2.Nf3 Nc6 3. Bc4 Nf6 4. Ng5 called?</p>
<p>Wikipedia article <a href="https://en.wikipedia.org/wiki/Two_Knights_Defense" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Two_Knights_Defense</a>, does not give a name.</p>
<p>This Youtube video <a href="https://www.youtube.com/watch?v=rKoZkrBWDbU" rel="nofollow noreferrer">https://www.youtube.com/watch?v=rKoZkrBWDbU</a> refers to 4.Ng5 as <em>The Knight Attack</em>, but I searched for it and I don't see other references to <em>The Knight Attack</em>.</p>
<p>Also, often people refer to 4.Ng5 as Fried Liver attack, which I believe is incorrect, since Fried Liver attack arises later in the game, after 1.e4 e5 2.Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7.</p>
 25509: <p>I think the name for <code>4. Ng5 is Knight Attack</code>. There isn't a specific name, because it leads to more specific openings, like the Fried Liver Attack, Polerio Defense <code>4. Ng5 d5 5. exd5 Na5</code> (trying to prevent the sacrifice), the Traxler Countergambit <code>4. Ng5 Bc5</code>, and more. It's just like how <code>1. e4 e5</code> is called the <code>open game</code>. There isn't a specific name for it, because it will lead to more specific opening.</p>
