What makes the Arch Angel Defense?

Hey,
I am wondering what actually makes the Arch Angel Defense be what it is. Below is the start of a game with Anand-Shirov. The magazine says that it is a sharp arch angel defense, but black's light squared bishop does not go to b7.

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5 6. c3 b5
7. Bc2 d5 8. a4 dxe4 9. axb5 Bg4 10. Bxe4 Nxe4 11. bxc6 O-O

What is the actual definition of the arch angel defense? Do I just need to to go an opening book like Nun's Chess Openings(NCO) and see the different variations that qualify?

KingOnPoint

The previous Anand-Shirov game ECO is C78, but a Kasparov-Kramnik C78 game has the black bishop going to b7.

Originally posted by KingOnPoint
The previous Anand-Shirov game ECO is C78, but a Kasparov-Kramnik C78 game has the black bishop going to b7.

This is the OP's pgn thingy 🙂

Originally posted by UnderPromote
That's a modern Archangel:

4...Nf6 5.0-0 b5 6.Bb3 Bc5 (Modern Archangel Defence)

the Archangelsk (or Archangel) is

3...a6 4.Ba4 Nf6 5.0-0 b5 6.Bb3 Bb7

If black's light squared bishop doesn't go to b7, but g4, is that still the modern ark angel opening?

KingOnPoint

I always remember this Arkhangelsk game from a book i have, mainly because of the double rook sac.