[Event "No. 4757 Tactic: Chess, Combination"] [Site "Swiss"] [Round "0"] [White "Costa"] [Black "Schauwecker"] [Result "0-1"] [ECO "A40"] [Opening "Queen's Pawn: Keres Defence"] 1. d4 e6 2. c4 Bb4+ 3. Nd2 d5 4. a3 Bxd2+ 5. Bxd2 Nf6 6. e3 O-O 7. Nf3 Nbd7 8. Rc1 Ne4 9. Bd3 f5 10. O-O Rf6 11. Qc2 c6 12. Be1 Rh6 13. Ne5 Nxe5 14. dxe5 Qh4 15. h3 Ng5 16. f3 {Diagram} Nxh3+ 17. gxh3 Qxh3 18. Qg2 Rg6 19. Qxg6 hxg6 20. Rc2 Qh6 21. Re2 Qg5+ 22. Kh1 Kf7 23. e4 Bd7 24. Bd2 {#R} 0-1