user109: By solid attacks, I mean, attacks that have been tested over time.  They don't necessarily have to be used at the top-level. I will give an example of what I am looking for:
The Fried Liver Attack can be used against the Two Knights Defense and the Traxler Counter Attack can be used against the Fried Liver Attack.

user307: I think the Cochrane gambit is sound enough:
[FEN ""]
1.e4 e5 2.Nf3 Nf6 3. Nxe5 d6 4. Nxf7!?

Also the Evans Gambit:
[FEN ""]
1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4

The Marshall counter-gambit in Ruy Lopez, sacrifices are pawn and gives black a good attack. However, it seems that some Grandmasters are using it as drawing tool, but for us black should have an attack.
[FEN ""]
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5


109: <p>By solid attacks, I mean, attacks that have been tested over time.  They don't necessarily have to be used at the top-level. I will give an example of what I am looking for:</p>

<p>The <code>Fried Liver Attack</code> can be used against the <code>Two Knights Defense</code> and the <code>Traxler Counter Attack</code> can be used against the <code>Fried Liver Attack</code>.</p>
 307: <p>I think the Cochrane gambit is sound enough:</p>

<pre><code>[FEN ""]
1.e4 e5 2.Nf3 Nf6 3. Nxe5 d6 4. Nxf7!?
</code></pre>

<p>Also the Evans Gambit:</p>

<pre><code>[FEN ""]
1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4
</code></pre>

<p>The Marshall counter-gambit in Ruy Lopez, sacrifices are pawn and gives black a good attack. However, it seems that some Grandmasters are using it as drawing tool, but for us black should have an attack.</p>

<pre><code>[FEN ""]
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5
</code></pre>
