I had a computer analysis done on my game where I palyed the najdorf and played e5 rather than e6 and received this note on the move:
6...e5?! 7.Nf3 Nc6 8.Qd2 b5 9. Bxf6 Qxf6 10. Nd5 Qd8 11. 0-0-0 Bg4 12. Be2 Qd7
Giving white a slight advantage and a solid outpost on d5
Hope this at least somewhat helps with your first question.
I switched to playing 1. e4 a short while ago and obviously I am now studying the Sicilian so I can play well against it. The book I have only shows the main lines and a few variations, but it doesn't talk much about the point to each move. In my studies, I have encountered some moves that I don't really understand the point of. I'd like some help understanding what they're meant to do. I'd also like any help on what the theory in the various variations of the Sicilian are, so that I can improvise rather than always play what my book says to play.
Sicilian Najdorf Questions: My questions on Najdorf have been answered. Thank you to those who helped me out with this. After more analysis on this I have decided I like 8. Qd2 instead of Nb3 or a3. If someone has a reason for me to not play Qd2, feel free to post it.
Sicilian Sveshnikov:
The moves I don't understand here are the two last moves. After Ndb5, can't black play a6, causing white's knight to move to a3 where it is practically useless? To me, it seems that the best move is Nxc6, but that isn't in my book (options shown are Ndb5, Nf3, Nb3, and Nf5), so I can't do too much analysis on it. Does any one know what happens after Nxc6? Also, why does black play d6 instead of a6? I noticed that black does play a6 in a couple of moves, but wouldn't getting rid of the knight right away be better?
I'll post questions about other lines later. I want to first analyze what I can on my own, so I don't make any stupid and hasty conclusions. Meanwhile, please help me out with what I posted so far.