How would you go about finding out the latest theory for a specific line like the Sicilian Najdorf 6 Bg5 variation? Where does one start looking?

Books on the Najdorf I guess...

Also go to chesspub.com and check out their fourms.

Or just post your line here for analysis.

Latest theory is generally the moves played in the GM games with the opening. You can find them at TWIC.

For complete theory, best sources are either specialized books or electronic magazines...

Why don,t you post the line so the chess community can analyze it for you.

This is gonna sound rude any way i type it, so sorry, but i'm of the opinion that if your game is advanced enough where you'd need the latest theory on a specific opening line, you'd already know the answer to your question. Personally, I'd just pop the line into a strong chess program and see where it takes the line.

Trying to answer questions on the 6.Bg5 Najdorf with a computer and without theory is madness.

Computers simply aren't powerful enough to be able to work out complicated lines many moves long that are today's theory.

Just as a suggestion though: 6.Bg5 e6 7.f4 Qc7!? - try this out. In my mega database, Black has a plus (!) score with ...Qc7, and it's perfectly sound (it has been used by Kasparov no less) without being totally insane (Poisoned Pawn, Polugaevsky (7...b5)). I use it - check it out.

I recommend the video on the 6. Bg5 Najdorf from IM Shankland, which can be found here, if you have access to it:

http://www.chess.com/video/player/shankland-teaches-the-najdorf-6bg5

Yes, the above link is good.

I saw a very good video where Kasparov teaches the Najdorf.

 I'm surprised you actually find the strength to make a post without the word Kasparov in it... shame you didn't manage it here, eh?

That was a good video! Now that you mention it, I also saw a video where Kasparov teaches the Kan variation...

To answer the general question (where do you start if you want to learn the theory on some line):

- Opening encyclopedias that cover everything (e.g., Nunn's Chess Openings)

- Recent GM games, preferably annotated

- Books on the specific opening, as recent as possible

- When you've absorbed all that (and are IM+ or an opening fanatic), subscribe to something like Chesspublishing to get updates

- Your own research. Learning theory to move 30 is nice, but it's better to have your own ideas on move 10 that have a good plan behind them and check out on the computer (they're hard to find, but still plenty out there).

I HATE HATE HATE KASPAROV. He lacks personality. He is like a frog who plays chess. The only diffrence is he can talk, and he doesnt sit on a lilypad. He is a good player, but for some reason i cant stand him, i wish someone would fly a RC Helicoptor into his face again!

*nods.  This is a good point.

You can find instructional videos on Youtube and chesslecture.com which will contain professional commentary on important lines and theory by prominent masters.  I would recommend starting there. 

I wrote an article on chess video lectures and how effective I believe them to be.  You can find it here, if interested: http://www.associatedcontent.com/article/904029/chess_video_lectures_are_they_for_you.html?cat=19

:)

Isn't that exactly what computers already do...? Who do you suppose goes through all the variations and the millions of moves accompanying them...Kasparov sitting at home with an abacus?

GMs working with computers. And only to find incremental improvements on the vast body of existing theory, not to just calculate entire new openings.

You can use the database of www.chessgames.com

Here is your specific request.

http://www.chessgames.com/perl/explorer?node=162533&move=6.5&moves=e4.c5.Nf3.d6.d4.cxd4.Nxd4.Nf6.Nc3.a6.Bg5&nodes=21720.32033.32034.32069.32070.32071.32072.32073.32074.65251.162533

Exactly what I was thinking. Besides, unless you're at least an NM or up, I don't see why you would need to find "the latest theory" on a specific opening line. However, I disagree about putting it into a chess program. They're good, but as stated previously, humans have advanced opening theory far enough. Just finding some theory by going through the game explorer would benefit you fine.