user31625: How does Black deal with the double pawns c7 and c6 on the Ruy Lopez exchange variation? In other words, after:
[FEN ""]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4

I feel that the doubled pawns are cumbersome, and I don't know how to use these two pawns in action. In the endgame, this can become a liability.
So, how can I use the doubled pawns to my advantage?

user31663: Yes I agree this seems cumbersome. But I might suggest using that as a solid defense. Since double pawns make it trickier to try and attack your king, especially if you castle queenside.
Even if you castle kingside, you can use this solid defense to slowly weaken the opponent's queenside, even if white is too castle kingside (likely so since it is already open).

user11144: Short: You don't.
Long: Those pawns will be a liability whatever you do (only in rare cases they do a breakthrough on the queenside - there was a very famous game with a b5 break), they aren't even very useful for center control. Your asset is the bishop pair instead, and you need to know how to use its full attacking and knight mobbing potential. The thought alone of trading f8 against c1 should make you scream in terror. Take a look at master games, the world championship games alone have enough material.

31625: <p>How does Black deal with the double pawns c7 and c6 on the Ruy Lopez exchange variation? In other words, after:</p>
<pre><code>[FEN &quot;&quot;]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4
</code></pre>
<p>I feel that the doubled pawns are cumbersome, and I don't know how to use these two pawns in action. In the endgame, this can become a liability.</p>
<p>So, how can I use the doubled pawns to my advantage?</p>
 31663: <p>Yes I agree this seems cumbersome. But I might suggest using that as a solid defense. Since double pawns make it trickier to try and attack your king, especially if you castle queenside.</p>
<p>Even if you castle kingside, you can use this solid defense to slowly weaken the opponent's queenside, even if white is too castle kingside (likely so since it is already open).</p>
 11144: <p>Short: You don't.</p>
<p>Long: Those pawns will be a liability whatever you do (only in rare cases they do a breakthrough on the queenside - there was a very famous game with a b5 break), they aren't even very useful for center control. Your asset is the bishop pair instead, and you need to know how to use its full attacking and knight mobbing potential. The thought alone of trading f8 against c1 should make you scream in terror. Take a look at master games, the world championship games alone have enough material.</p>
