Koroman, Nathaniel
Current rating: 1543
Record: 21-17-1
| Grand Prix Pittsburgh 2016 (SOI standard) | starting rating: 1572 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 175 | Leventhal, Jackson (1520) | Won 2-1 | +171589 |
| 3standard | 228 | Newton, Clifford (1445) | Lost 0-2 | -211568 |
| 4standard | 331 | Kriner, Jacob (1467) | Lost 0-2 | -201548 |
| 5standard | 511 | Baverso, Vincent (1411) | Won 2-0 | +161564 |
| 6standard | 346 | Pettinari, Eric (1506) | Won 2-0 | +171581 |
| 7standard | 291 | Yates, Jonathan (1503) | Draw 1-1 | -21579 |
| 8standard | 237 | Speth, Travis (1549) | Lost 1-2 | -181561 |
| 9standard | 299 | Sweetman, Zane (1584) | Lost 0-2 | -181543 |
| top | average opponent: 1498record: 3-4-1 | new rating: 1543 | ||
| Grand Prix Atlanta 2015 (BFZ limited) | starting rating: 1613 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 177 | Aguilar, Corey (1500) | Won 2-0 | +161629 |
| 2sealed | 141 | Dziengelewski, Austin (1687) | Lost 1-2 | -171612 |
| 3sealed | 489 | Powers, Justin (1503) | Lost 0-2 | -201592 |
| 4sealed | 657 | Russell, Jeff (1451) | Lost 0-2 | -201572 |
| top | average opponent: 1535record: 1-3 | new rating: 1572 | ||
| Grand Prix Dallas-Fort Worth 2015 (ORI limited) | starting rating: 1661 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 402 | Pizzini, James (1482) | Won 2-0 | +151676 |
| 2sealed | 293 | Sasin, Christopher (1518) | Lost 1-2 | -211655 |
| 3sealed | 613 | Bates, Adam (1500) | Lost 1-2 | -211634 |
| 4sealed | 527 | Woolley, Joshua (1466) | Lost 0-2 | -211613 |
| top | average opponent: 1492record: 1-3 | new rating: 1613 | ||
| Grand Prix Las Vegas 2015 (2) (MM2 limited) | starting rating: 1648 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 362 | Hall, Brian (1415) | Won 2-1 | +141662 |
| 2sealed | 25 | Hackmey, Daniel (1432) | Won 2-0 | +141676 |
| 3sealed | 175 | Lunch, Benjamin (1500) | Won 2-1 | +151691 |
| 4sealed | 81 | Chan, Eric (1541) | Won 2-0 | +151706 |
| 5sealed | 10 | Connors, Aidan (1571) | Lost 1-2 | -211685 |
| 6sealed | 42 | Ortiz, Julian (1505) | Won 1-0 | +151700 |
| 7sealed | 48 | Davalos, Dante (1654) | Lost 1-2 | -191681 |
| 8sealed | 66 | Carter, R. Aaron (1567) | Lost 0-2 | -201661 |
| top | average opponent: 1523record: 5-3 | new rating: 1661 | ||
| Grand Prix Cleveland 2015 (FRF limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 583 | Chambers, Jeff (1548) | Won 2-1 | +191519 |
| 2sealed | 165 | Shelley, James (1518) | Won 2-0 | +181537 |
| 3sealed | 359 | Barhorst, Alex (1536) | Won 2-1 | +181555 |
| 4sealed | 178 | Miller, Matthew A (1520) | Won 2-0 | +171572 |
| 5sealed | 40 | Rodrigues, Hugo (1723) | Lost 1-2 | -151557 |
| 6sealed | 156 | Hampton, Jesse (1945) | Won 2-0 | +251582 |
| 7sealed | 38 | Cooney, Aaron (1570) | Won 2-1 | +171599 |
| 8sealed | 62 | Carter, Steven (1705) | Won 2-0 | +201619 |
| 9sealed | 34 | Weiford, Jess (1676) | Won 2-0 | +191638 |
| 10draft | 101 | Osorio, Javier (1600) | Lost 0-2 | -181620 |
| 11draft | 106 | McVety, Max (1648) | Lost 0-2 | -181602 |
| 12draft | 49 | Nolen, Lauren (1731) | Won 2-0 | +211623 |
| 13draft | 1 | D'Agostino, Vince (1853) | Won 2-0 | +221645 |
| 14draft | 27 | Cooney, Aaron (1627) | Won 2-1 | +171662 |
| 15draft | 57 | Davis, John (1867) | Lost 0-2 | -141648 |
| top | average opponent: 1671record: 11-4 | new rating: 1648 | ||