user12876: Generally are there any distinguishable patterns you look find in the opening that you recognize as weak, or exploitable. Or generally any openings that provide the over-bearing sense of duty on a piece? 

user13930: Prior to castling, f2/f7 are the most exploitable squares in the game, because they are defended by only one piece: the king. That's why so many king-stuck-in-the-center games are rounded off by a piece sacrificing itself on those squares.
On the queenside, the c2 and c7 squares also have problems, because of a tactical sequence like this:
1. Bf1-b5+ Qb6xb5
2. Nd5-c7 (forking the queen with either a king on e8, or a rook on a8)

But these tactics happen less often than tactics on f2-f7, because the queen is usually a better defender than the king.

12876: <p>Generally are there any distinguishable patterns you look find in the opening that you recognize as weak, or exploitable. Or generally any openings that provide the over-bearing sense of duty on a piece? </p>
 13930: <p>Prior to castling, f2/f7 are the most exploitable squares in the game, because they are defended by only one piece: the king. That's why so many king-stuck-in-the-center games are rounded off by a piece sacrificing itself on those squares.</p>

<p>On the queenside, the c2 and c7 squares also have problems, because of a tactical sequence like this:</p>

<pre><code>1. Bf1-b5+ Qb6xb5
2. Nd5-c7 (forking the queen with either a king on e8, or a rook on a8)
</code></pre>

<p>But these tactics happen less often than tactics on f2-f7, because the queen is usually a better defender than the king.</p>
