[Event "Leningrad"] [Site "Leningrad"] [Date "1948.??.??"] [White "Viktor Korchnoi"] [Black "Boris Spassky"] [Result "1-0"] [Variant "Standard"] [ECO "B71"] [Opening "Sicilian Defense: Dragon Variation, Levenfish Variation"] [StudyName "World Champions"] [ChapterName "Viktor Korchnoi - Boris Spassky"] [ChapterURL "https://lichess.org/study/nkXYPOHc/0AKtmKTo"] [Annotator "https://lichess.org/@/Premier_Chess"] [Orientation "white"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4 (6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 { [%cal Gf1c4,Gd6d5] } 9. Bc4 (9. O-O-O d5 10. exd5 Nxd5 11. Nxc6 bxc6 12. Bd4 e5 13. Bc5 { [%csl Ge4,Gc6] }) 9... Bd7 10. O-O-O Rc8 11. Kb1 Ne5 12. Bb3 Nc4 13. Bxc4 Rxc4 { [%cal Gc4c3,Gb7b5] }) 6... Bg4 7. Bb5+ Nbd7 (7... Bd7 { [%csl Gd7] }) 8. Bxd7+ Qxd7 9. Qd3 { [%csl Gd5,Gg4] } 9... e5 10. Nf3 Bxf3 11. Qxf3 { [%csl Gf8] } 11... Qg4 12. Nd5 { 1-0 Black resigns. } 12... Qxf3 13. Nxf6+ Ke7 14. Nd5+ Kd7 15. gxf3 1-0