Round 9 - Sunday, May 17, 10:00 am
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| Board | White | Rating | Result | Black | Rating |
| 1. | IM Robert Hess (6) | 2545 | ½-½ | GM Varuzhan Akobian (5½) | 2664 |
| 2. | GM Hikaru Nakamura (6) | 2757 | 1-0 | GM Joshua Friedel (5) | 2568 |
| 3. | GM Alexander Onischuk (5½) | 2736 | 1-0 | IM Ray Robson (4½) | 2542 |
| 4. | GM Jaan Ehlvest (4) | 2649 | ½-½ | GM Gata Kamsky (5½) | 2798 |
| 5. | GM Yury Shulman (4½) | 2697 | ½-½ | GM Gregory Kaidanov (4) | 2662 |
| 6. | IM Enrico Sevillano (4) | 2549 | 0-1 | GM Larry Christiansen (4) | 2681 |
| 7. | GM Joel Benjamin (4) | 2650 | ½-½ | GM Alexander Shabalov (4) | 2620 |
| 8. | GM Ildar Ibragimov (4) | 2628 | 1-0 | IM Michael Brooks (4) | 2419 |
| 9. | IM Samuel Shankland (3) | 2464 | 0-1 | GM Boris Gulko (3½) | 2631 |
| 10. | GM Julio Becerra (3½) | 2672 | ½-½ | GM Melikset Khachiyan (2½) | 2632 |
| 11. | Tyler Hughes (3) | 2293 | 1-0 | FM Doug Eckert (2) | 2278 |
| 12. | IM Irina Krush (3) | 2496 | ½-½ | Charles Lawton (½) | 2350 |
Round 9 (May 17, 2009)
Hess, Robert L
- Akobian, Varuzhan
½-½
43
C11
French Defence
Shulman, Yuri
- Kaidanov, Gregory S
½-½
37
D43
Anti-Meran Gambit
Ibragimov, Ildar
- Brooks, Michael A
1-0
42
E10
Blumenfeld Counter Gambit
Sevillano, Enrico
- Christiansen, Larry M
0-1
38
C41
Philidor's Defence
Benjamin, Joel
- Shabalov, Alexander
½-½
56
B51
Sicilian Rossolimo
Shankland, Samuel L
- Gulko, Boris F
0-1
35
B64
Sicilian Rauzer
Becerra Rivero, Julio
- Khachiyan, Melikset
½-½
20
C43
Petroff's Defence
Nakamura, Hikaru
- Friedel, Joshua E
1-0
22
C58
Two Knights Defence
Krush, Irina
- Lawton,Charles
½-½
31
B08
Pirc Defence
Hughes, Tyler B
- Eckert, Doug D
1-0
27
D85
Gruenfeld Defence
Onischuk, Alexander
- Robson, Ray
1-0
67
D45
Anti-Meran Variations
Ehlvest, Jaan
- Kamsky, Gata
½-½
57
C48
Four Knights Rubinstein
Round 9 News and Media Coverage
HIKARU NAKAMURA WINS 2009 US CHESS CHAMPIONSHIP
Saint Louis, May 17 -- Hikaru Nakamura, 21, of White Plains, N.Y., won the the 2009 U.S. Chess Championship after winning in the ninth and final round at the Chess Club and Scholastic Center of Saint Louis.
Second-seeded Nakamura, who also won the title in 2004, when he was just 16, won the venerable 164-year-old title and first prize of $40,000 ($35,000, plus a $5,000 outright winner's bonus) after beating Josh Friedel, of New York. Nakamura finished with seven points over nine games, and never lost a game.