Sicilian Najdorf

Hey all !

Can any master tell me whether this opening:

is recommended for a 1800 fide rated player? 

Yeah, it's OK I guess. Lots of theory though. 

 No it isnt....and its not about theory. A 1800 player is not ready to support tactically and positionally the middlegame positions that occur. Needless to say that he will not be ready until reach FM or IM.

It requires a lot of experience and training.

I am not a Master so you can safely ignore my opinion.

"Generally speaking, 'Starting Out' and 'Sicilian Najdorf' are not exactly words that one envisions in the same title, because anyone who is just starting out should not dive into the vast ocean of theory that is the Najdorf. For beginners, the time invested in studying even minor lines can be more productively used solving tactical puzzles and basic endgame technique.
...
... In some lines, a good understanding of basic principles will take you far, while in others, such as the Poisoned Pawn (6 Bg5 e6 7 f4 Qb6!?), memorization is a must, as one wrong move can cost you the game in the blink of an eye. ..." - FM Carsten Hansen (2006)
https://web.archive.org/web/20140626175558/http://www.chesscafe.com/text/hansen87.pdf

"... one simply cannot play the [Najdorf Sicilian] safely without studying the complications and remembering a lot of concrete variations. If you are averse to doing this, or you have a poor memory, you are better off avoiding such lines." - FM Steve Giddins (2003)
"As a professional player, I participate in many opens. I need at least 7.5/9 for the first place so I have little margin for mistakes. ... It suffices to mention the 6.Bg5-attack with forced variations all the way up to move thirty or more, to understand my reluctance to use the Najdorf. ..." - GM Alexander Delchev (2006)
"... I will try to predict the future course of developments in the theory of the Sicilian, over the near future. ... The more deeply we study [the position after 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4], the more apparent White's advantage will become. The Polugaevsky Variation and the Dragon Variation will die out. The Paulsen and Najdorf Variations will survive longer, but they will face an unenviable fate: it will be hard for them to survive in the face of computer programs and multi-million game databases. ..." - GM Evgeny Sveshnikov (2014)

Thank you all

I am a huge fan of the Sicilian Najdorf. In that position, I thought it was a Scheveningen, LOL. I still don't recommend playing the Najdorf unless you have studied many lines and is a very tactical player. The Najdorf has so many lines to study it took me hours to finally memorise each line. There was a game between Karjakin and Anand that was amazing where Karjakin was black and was able to do so many brilliant tactics,  you should check that out.