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| Board | White | Rating | Result | Black | Rating |
| 1. | GM Hikaru Nakamura (3) | 2757 | ½-½ | GM Gata Kamsky (3) | 2798 |
| 2. | GM Joshua Friedel (3) | 2568 | 0-1 | GM Yury Shulman (3) | 2697 |
| 3. | GM Jaan Ehlvest (2½) | 2649 | 0-1 | GM Varuzhan Akobian (3) | 2664 |
| 4. | IM Samuel Shankland (2½) | 2464 | 0-1 | GM Alexander Onischuk (2½) | 2736 |
| 5. | IM Robert Hess (2½) | 2545 | 1-0 | GM Melikset Khachiyan (2½) | 2632 |
| 6. | GM Julio Becerra (2) | 2672 | 0-1 | IM Michael Brooks (2) | 2419 |
| 7. | IM Ray Robson (2) | 2542 | ½-½ | GM Gregory Kaidanov (2) | 2662 |
| 8. | GM Joel Benjamin (2) | 2650 | 1-0 | Tyler Hughes (2) | 2293 |
| 9. | IM Irina Krush (1½) | 2496 | ½-½ | GM Larry Christiansen (1½) | 2681 |
| 10. | GM Alexander Shabalov (1½) | 2620 | 0-1 | IM Enrico Sevillano (1½) | 2549 |
| 11. | GM Ildar Ibragimov (1) | 2628 | ½-½ | GM Boris Gulko (1) | 2631 |
| 12. | FM Doug Eckert (0) | 2278 | 1-0 | Charles Lawton (0) | 2350 |
| Round 5 (May 12, 2009) | |||||
|---|---|---|---|---|---|
| Ehlvest, Jaan | - Akobian, Varuzhan | 0-1 | 40 | C05 | French Tarrasch |
| Friedel, Joshua E | - Shulman, Yuri | 0-1 | 35 | C19 | French Winawer |
| Krush, Irina | - Christiansen, Larry M | ½-½ | 45 | A40 | Unusual Replies to 1.d4 |
| Benjamin, Joel | - Hughes, Tyler B | 1-0 | 26 | B40 | Sicilian Classical |
| Shankland, Samuel L | - Onischuk, Alexander | 0-1 | 22 | C45 | Scotch Game |
| Becerra Rivero, Julio | - Brooks, Michael A | 0-1 | 84 | B05 | Alekhine's Defence |
| Eckert, Doug D | - Lawton,Charles | 1-0 | 46 | E93 | King's Indian Classical |
| Robson, Ray | - Kaidanov, Gregory S | ½-½ | 37 | C80 | Ruy Lopez Open |
| Shabalov, Alexander | - Sevillano, Enrico | 0-1 | 39 | D43 | Anti-Meran Gambit |
| Ibragimov, Ildar | - Gulko, Boris F | ½-½ | 32 | E48 | Nimzo Indian |
| Hess, Robert L | - Khachiyan, Melikset | 1-0 | 44 | B81 | Sicilian Keres Attack |
| Nakamura, Hikaru | - Kamsky, Gata | ½-½ | 35 | A10 | Dutch, QI and KID Systems |
St. Louis, MO, May 12, 2009 -- Defending champion Yury Shulman, of Barrington, Ill., and Varuzhan Akobian, of North Hollywood, Calif., broke from the pack to take the joint lead of the 2009 U.S. Chess Championship at the Chess Club and Scholastic Center of Saint Louis.