Kogan, Mark
Current rating: 1487
Record: 15-16-4
| Grand Prix Charlotte 2015 (modern) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 317 | Moss, Barry J (1500) | Won 2-0 | +191481 |
| 2modern | 213 | Dowey, Sean (1586) | Lost 0-2 | -161465 |
| 3modern | 411 | Sieglinger, Jason (1480) | Won 2-0 | +181483 |
| 4modern | 381 | Gammon, Ian (1514) | Lost 0-2 | -171466 |
| 5modern | 452 | Grooms, William (1482) | Lost 1-2 | -181448 |
| 6modern | 490 | McRowan, Edward (1470) | Lost 1-2 | -181430 |
| 7modern | 463 | Ison, Austin (1464) | Won 2-1 | +191449 |
| 8modern | 390 | Crowley, Dave (1453) | Won 2-1 | +181467 |
| 9modern | 348 | Weisheit, Hunter (1595) | Won 2-0 | +201487 |
| top | average opponent: 1505record: 5-4 | new rating: 1487 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1458 | Gersher, Eric (1500) | Won 2-1 | +181516 |
| 2modern | 1184 | Burrows, Ayren (1518) | Won 2-1 | +181534 |
| 3modern | 1042 | Carrin, Talon (1527) | Lost 1-2 | -181516 |
| 4modern | 1369 | Williams, Vincent (1500) | Lost 0-2 | -191497 |
| 5modern | 1479 | Presnell, Joseph (1558) | Draw 1-1 | +11498 |
| 6modern | 1383 | Haberstroh, Jaron (1482) | Won 2-0 | +181516 |
| 7modern | 1288 | Koeppicus, Garrett (1497) | Lost 0-2 | -181498 |
| 8modern | 1260 | Fukagawa, Souichiro (1499) | Lost 0-2 | -181480 |
| 9modern | 1217 | Meinerding, James (1499) | Lost 1-2 | -181462 |
| top | average opponent: 1509record: 3-5-1 | new rating: 1462 | ||
| Grand Prix Washington DC 2013 (legacy) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 216 | Kent, Doug (1500) | Draw 1-1 | 01482 |
| 2legacy | 373 | Weidel, Robert (1500) | Lost 0-2 | -181464 |
| 3legacy | 680 | Kahl, William (1465) | Won 2-0 | +181482 |
| 4legacy | 591 | Slavick, Dylan (1365) | Won 2-0 | +161498 |
| 5legacy | 412 | DeStefano, Alexander (1459) | Won 2-1 | +171515 |
| 6legacy | 568 | Sagnay, Philip (1551) | Draw 1-1 | +11516 |
| 7legacy | 397 | Cooney, James (1498) | Draw 1-1 | 01516 |
| 8legacy | 274 | Sacks, Neal (1513) | Lost 1-2 | -181498 |
| top | average opponent: 1481record: 3-2-3 | new rating: 1498 | ||
| Grand Prix Atlantic City 2013 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 168 | Patton, Brandon (1509) | Lost 0-2 | -181482 |
| 2standard | 638 | Dunau, Bera (1482) | Won 2-1 | +181500 |
| 3standard | 465 | Stasio, Joseph (1486) | Won 2-0 | +181518 |
| 4standard | 472 | CARLSON, LENNIE (1523) | Won 2-0 | +181536 |
| 5standard | 213 | Calandro, Tiffany (1536) | Lost 1-2 | -181518 |
| 6standard | 279 | Mason, Sky (1525) | Lost 1-2 | -181500 |
| 7standard | 426 | Muzio, Anthony (1477) | Lost 1-2 | -181482 |
| 8standard | 374 | Morrison, Matthew (1481) | Lost 1-2 | -181464 |
| 9standard | 320 | Washington, William (1461) | Won 2-0 | +181482 |
| top | average opponent: 1498record: 4-5 | new rating: 1482 | ||