Chess Opening Theory/1. e4/1...Nc6/2. d4/2...d5/3. Nc3/3...a6/4. exd5/4... Nb4

< Chess Opening Theory‎ | 1. e4‎ | 1...Nc6‎ | 2. d4‎ | 2...d5‎ | 3. Nc3‎ | 3...a6‎ | 4. exd5