user38: On this example chess opening theory table, what does "Σ%" and the number before it mean?

user132: The two figures in the “Σ%” column are the number of games referenced in the database (so “Σ” should be understood in its mathematical meaning, “total” or “sum”) and the percentage of games won by White.

user17: In the example given, the opening move was Nf3. A number of the main lines were given, eight more moves for Black, seven more moves for White. Then the percentages of games won by White (in tournaments) using the respective lines were tallied.
Here's a link to the table:
http://en.wikipedia.org/wiki/Chess_opening_theory_table

38: <p>On this <a href="http://en.wikipedia.org/wiki/Chess_opening_theory_table" rel="noreferrer">example chess opening theory table</a>, what does "Σ%" and the number before it mean?</p>
 132: <p>The two figures in the “Σ%” column are the number of games referenced in the database (so “Σ” should be understood in its mathematical meaning, “total” or “sum”) and the percentage of games won by White.</p>
 17: <p>In the example given, the opening move was Nf3. A number of the main lines were given, eight more moves for Black, seven more moves for White. Then the percentages of games won by White (in tournaments) using the respective lines were tallied.</p>

<p>Here's a link to the table:</p>

<p><a href="http://en.wikipedia.org/wiki/Chess_opening_theory_table" rel="nofollow">http://en.wikipedia.org/wiki/Chess_opening_theory_table</a></p>
