[Event "Top Openings for beginners: Chapter 2"] [Date "2026.07.23"] [Result "*"] [Variant "Standard"] [ECO "C42"] [Opening "Petrov's Defense: Classical Attack, Mason Variation"] [StudyName "Top Openings for beginners"] [ChapterName "Chapter 2"] [ChapterURL "https://lichess.org/study/cgZOmj42/7cnxYZWG"] [Annotator "https://lichess.org/@/dormantt"] [UTCDate "2026.07.23"] [UTCTime "18:33:12"] [Orientation "black"] 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O O-O *