[Event "St. Petersburg"] [Site "?"] [Round "0"] [White "Potemkin"] [Black "Alekhine"] [Result "0-1"] [ECO "B20"] [Opening "Sicilian: 2.g3"] 1. e4 c5 2. g3 g6 3. Bg2 Bg7 4. Ne2 Nc6 5. c3 Nf6 6. Na3 { Knights do not belong at the edge of the board!} 6... d5 7. exd5 Nxd5 8. Nc2 { This is a very artificial formation, with a big hole at d3.} 8... O-O 9. d4 cxd4 10. cxd4 Bg4 {This pin of the knight is annoying, since it undermines the protection of the isolated pawn at d4. So White breaks it, but this creates a weakness in the critical area surrounding the White king.} 11. f3 Bf5 12. Ne3 Qa5+ 13. Kf2 Ndb4 {Now we can see the significance of the weak square at d3. The knight will occupy the square with check, and this will interrupt the d-file, so that the pawn at d4 is vulnerable.} 14. Nxf5 Qxf5 15. g4 Nd3+ 16. Kg3 {The pawn at d4 keeps both knight and bishop from joining in the attack. With this in mind, Alekhine unleashes a powerful combination.} 16... Nxd4 17. gxf5 Nxf5+ {Black resigned, since mate is inevitable.} 18. Kg4 h5+ 19. Kh3 Nf2# 0-1