The difference is that 7...0-0 is aimed at developing asap, while 7...Qa5 is a move that is meant to force 0-0 by White. Sometimes those can be transpositions.
The main move is 8...d6. 8...a5 hasn't been refuted, but White is known to get a comfortable game after 9.0-0. However, there's lots of theotry there, e.g. the clam 9...d6, pawn trade 9...a4, piece trade 9...Ng4, etc.
hello, im new to this website, started playing few days ago! seems a nice play to improve.
i have been taking a look at the acc dragon recently, and found different sources:
some suggesting: 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 Nc6 6. Be3 Nf6 7. Bc4 O-O 8.Bb3 a5
and others suggesting Qa5 on move 7 instead of 0-0 for black, does anyone have any idea what's the difference between these two variations? is the Qa5 move newer than a5? was a5 refuted or did it lose popularity due to a specific variation?
i tried searching for experts comparaison on these 2 variations, but couldn't find any!
Any input is appreciated.
thank you in advance.