Nowadays when you play Sicilian you will not get Open as much. More people will play the annoying sidelines like 3. Ab5+, even to the highest level (as Magnus is example of). But if you happen to get Najdorf, not a big amount of White players will choose 6. Ag5 anyway. It is extremely large amount of knowledge to play 6. Ag5 properly as White. If you still happen to get 6. Ag5, 7....Dc7 is good line. You would get 6. Ag5 about the same amount of times that you get to play your desired Ruy López main line on move 9.
BobbyDigital80 wrote on 01/30/19 at 04:19:47:
If the Kozul Richter-Rauzer line is fine for Black, I might take that up as well. I used to play the Classical Sicilian but never found a line I felt that comfortable with against the Rauzer. Mainly because it seemed like most sources I looked at showed that White is just always better. Since this early ...Qc7 line in the Najdorf can lead to Rauzer-type positions if white plays Bxf6 gxf6, it might make sense to study the Kozul line too.
It is off topic, but actually I contacted the Thinkers Publishing a whilst ago, they told me that a new edition of Kozul's Richter-Rauzer book available on 21th of February:
https://www.thinkerspublishing.com/expected-arrivals.html7...Dc7 is essentially Najdorf version of the Kozul since Black gets the wrecked f-pawns but two bitchops. All the same ideas, such as playing ...h5 and sometimes castling 0-0-0 that are present in the Kozul Variation of the Richter-Rauzer can apply to 7...Dc7.
Most Black books on Najdorf have not recommended 7...Dc7 since that 2003 book by Emms. For example, Dokjnas book from last month recommends 6...Cbd7. Pavloviç's book
The Modernised Najdorf recommends the Delayed Poisoned Pawn. These two are the topical choices for the elite. I bet that you would surprise White players even GMs if you played 7...Dc7 since they rarely will have played against it