123456

http://www.chess.com/explorer/

It looks like Na3 is your best bet. It won a whopping 80% of the games where it was played.

The Blackmar-Diemer-Gambit...of course...

Ruy lopez if you like e4 and queens gambit if you like d4,

as black you are looking for the nimzo indian against d4 and the najdorf against e4

I think you failed to see the sarcasm in notmtwain's post. What he means is: there's much more to statistics than meets the eye.

When you're considering these raw percentages, you also have to consider:

1. Does the line contain a high percentage of older and since partially refuted lines ?

2. Does the line contain a high percentage of blunders on the opponent's part?

3. Has the line been played by players with a high or with a low average rating?

4. Has the line been successfully played 4 or 4000 times?

... and so on.

Win/loss/draw percentages for openings will vary by player strength I imagine.

At our level, I doubt there are that many draws with, for example, the Slav Exchange variation.

But GMs I think as black have to avoid the Slav exchange with black. I've read somewhere that FMs and IMs can steer Exchange Slavs as white to draws and there wouldn't be much higher rated GMs can do about it on the black side.

I'm pretty sure something like Chessbase will have lots of filters that accompanies opening percentages.

If it's not a close contest between 1.e4 and 1.d4 I'll eat my chessboard.