2009 U.S. Championship
Location: St. Louis, Missouri
May 07, 2009 to May 17, 2009
9 rounds
Swiss tournament
Winner: Hikaru Nakamura
May 07, 2009 to May 17, 2009
9 rounds
Swiss tournament
Winner: Hikaru Nakamura
| Place | Player | Score | W | L | D |
|---|---|---|---|---|---|
| 1. | Hikaru Nakamura | 7.0 / 9 | 5 | 0 | 4 |
| 2. | Robert Hess | 6.5 / 9 | 5 | 1 | 3 |
| 2. | Alexander Onischuk | 6.5 / 9 | 4 | 0 | 5 |
| 4. | Varuzhan Akobian | 6.0 / 9 | 5 | 2 | 2 |
| 4. | Gata Kamsky | 6.0 / 9 | 3 | 0 | 6 |
| 6. | Larry Christiansen | 5.0 / 9 | 3 | 2 | 4 |
| 6. | Joshua Friedel | 5.0 / 9 | 4 | 3 | 2 |
| 6. | Ildar Ibragimov | 5.0 / 9 | 3 | 2 | 4 |
| 6. | Yury Shulman | 5.0 / 9 | 3 | 2 | 4 |
| 10. | Joel Benjamin | 4.5 / 9 | 3 | 3 | 3 |
| 10. | Jaan Ehlvest | 4.5 / 9 | 2 | 2 | 5 |
| 10. | Boris Gulko | 4.5 / 9 | 3 | 3 | 3 |
| 10. | Ray Robson | 4.5 / 9 | 4 | 4 | 1 |
| 10. | Alexander Shabalov | 4.5 / 9 | 3 | 3 | 3 |
| 15. | Julio Becerra Rivero | 4.0 / 9 | 3 | 4 | 2 |
| 15. | Michael Brooks | 4.0 / 9 | 3 | 4 | 2 |
| 15. | Enrico Sevillano | 4.0 / 9 | 3 | 4 | 2 |
| 15. | Player not found | 4.0 / 9 | 4 | 5 | 0 |
| 19. | Gregory Kaidanov | 3.5 / 8 | 1 | 2 | 5 |
| 19. | Irina Krush | 3.5 / 9 | 2 | 4 | 3 |
| 21. | Melikset Khachiyan | 3.0 / 9 | 2 | 5 | 2 |
| 21. | Sam Shankland | 3.0 / 9 | 1 | 4 | 4 |
| 23. | Doug Eckert | 2.0 / 6 | 2 | 4 | 0 |
| 24. | Player not found | 1.0 / 9 | 0 | 7 | 2 |
| 25. | Anna Zatonskih | 0.5 / 2 | 0 | 1 | 1 |