Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bb5/3...a6/4. Ba4/4...Nf6/5. O-O/5...Bc5
Ruy López Opening: Morphy Defense, Neo-Arkhangelsk Variation: edit
Black develops his bischop befor playing 5...b5 which prevents white from playing 6.Bb4 6...Bc5 7. a4 but allows 6.c3 6...b5 7.Bc2 or 6.Bxc6. White could also continue to play 6. d3 The Anderssen Variation.