[Event "USCF/WS/23VP04 (USA)"] [Site "ICCF"] [Date "2023.02.12"] [White "Schaeperkoetter, Charles"] [Black "Lang, James"] [Result "1-0"] [Annotator "Irons,Robert"] [Variant "Standard"] [ECO "D01"] [Opening "Rapport-Jobava System"] [Source "https://lichess.org/study/5lK7nI0w/tOHSWa6I"] [Orientation "white"] 1. d4 Nf6 2. Nc3 d5 3. Bf4 e6 (3... c5! 4. e3 (4. Nb5 Qa5+ $19) 4... cxd4 5. exd4 Bg4!? { looks good for Black. }) 4. Nb5 Na6 5. a3 c6 6. Nc3 Bd6 7. e3 O-O 8. Nf3 Nb8 9. Bd3 b6 10. Ne5 c5?! (10... Qc7 { and 11. ... Nbd7 keeps things fairly level. White's center is solid, so this "break" doesn't have the impact Black is hoping for. In the meantime he is still behind in development! }) 11. g4 c4? 12. g5 cxd3 13. gxf6 dxc2? $18 (13... Qxf6 $16 { is simple enough. }) 14. Qxc2 (14. Qh5 Qxf6 15. Ng4 Qf5 16. Nh6+! gxh6 17. Qxf5 exf5 18. Bxd6 { and here both the f8-rook and the d5-pawn are hanging, and there are still threats in the air. For example, if Black tries } 18... Rd8?? { he loses instantly: } 19. Rg1+ Kh8 20. Be5+ f6 21. Bxf6#) 14... Qxf6 15. Rg1 g6?! (15... Qd8 16. Nb5 Bxe5 17. dxe5 Qh4 18. Bg5 Qh5 19. Be7 { and Black is so far behind in development that his best bet here is to lose the exchange and develop another piece with } 19... Nd7 $16) 16. Nb5 Qe7? { Necessary is } (16... Bxe5 17. Bxe5 Qf3 { when White still wins the Exchange with } 18. Nc7 $18) 17. Nxd6 Qxd6 18. Nxg6 Qc6? { I have nothing better to offer, but the text leads to mate in four moves. } 19. Ne7+ { 1-0 White wins. } (19. Kh8 Be5+ 20. f6 Bxf6+ 21. Rxf6 Rg8#) 1-0