Cohoon, Marshall
Current rating: 1462
Record: 12-16-2
| Grand Prix Richmond 2018 (leg) (legacy) | starting rating: 1453 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 126 | Calderon, Roberto (1478) | Draw 1-1 | +11454 |
| 2legacy | 168 | Marx, Brian (1433) | Lost 0-2 | -191435 |
| 3legacy | 347 | Morris, Charles (1453) | Won 2-0 | +191454 |
| 4legacy | 297 | Britton, Steven (1464) | Won 2-1 | +181472 |
| 5legacy | 213 | Beasley, Orrin (1803) | Lost 0-2 | -121460 |
| 6legacy | 272 | Vanderwoude, John (1495) | Won 2-0 | +181478 |
| 7legacy | 198 | Akhundzadeh, Amir (1533) | Lost 0-2 | -171461 |
| 8legacy | 201 | Bisio, Virgilio (1483) | Draw 1-1 | +11462 |
| top | average opponent: 1518record: 3-3-2 | new rating: 1462 | ||
| Grand Prix San Diego 2015 (ORI standard) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 290 | Euribe, Julio (1517) | Won 2-1 | +191464 |
| 3standard | 91 | Leach, William (1427) | Lost 0-2 | -181446 |
| 4standard | 397 | Weeks, Kevin (1485) | Won 2-1 | +181464 |
| 5standard | 240 | Jackson, Ron (1525) | Lost 0-2 | -171447 |
| 6standard | 386 | Jenne, Evan (1523) | Lost 1-2 | -161431 |
| 7standard | 318 | LaGamba, Michael (1491) | Won 2-1 | +191450 |
| 8standard | 259 | Thomas, Drew (1595) | Lost 0-2 | -161434 |
| 9standard | 235 | Johnson, Dustin (1481) | Won 2-1 | +191453 |
| top | average opponent: 1505record: 4-4 | new rating: 1453 | ||
| Grand Prix Baltimore 2014 (KTK limited) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 231 | Woods, Mark (1519) | Won 2-0 | +191468 |
| 2sealed | 105 | Gore, Emmett (1506) | Won 2-0 | +191487 |
| 3sealed | 192 | East, Samuel (1534) | Won 2-0 | +191506 |
| 4sealed | 47 | Stark, Ben S (2000) | Lost 0-2 | -101496 |
| 5sealed | 123 | Leeper, Jason (1502) | Lost 1-2 | -181478 |
| 6sealed | 193 | Egli, Walter (1534) | Lost 0-2 | -171461 |
| 7sealed | 262 | Cheng, Johnny (1568) | Lost 1-2 | -161445 |
| top | average opponent: 1595record: 3-4 | new rating: 1445 | ||
| Grand Prix Washington DC 2014 (JOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 138 | Barlieb, Nicholas (1525) | Lost 0-2 | -181482 |
| 2sealed | 370 | Gelillo, Daniel (1482) | Won 2-0 | +181500 |
| 3sealed | 480 | Kendall, Brandon (1451) | Won 2-0 | +181518 |
| 4sealed | 345 | Ross, Jonathan (1644) | Lost 1-2 | -161502 |
| 5sealed | 435 | Michel, Gregory (1500) | Lost 0-2 | -181484 |
| 6sealed | 415 | Hogan, Sean (1517) | Lost 0-2 | -181466 |
| 7sealed | 371 | Colman, Joseph (1483) | Lost 0-2 | -171449 |
| top | average opponent: 1515record: 2-5 | new rating: 1449 | ||