Joo, Jonathan
Current rating: 1438
| Grand Prix Louisville 2017 (legacy) | starting rating: 1422 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 683 | Gooch, Paul (1445) | Lost 1-2 | -171405 |
| 2legacy | 766 | Casarella, Burt (1449) | Won 2-0 | +191424 |
| 3legacy | 877 | Lai, Michael (1639) | Lost 0-2 | -151409 |
| 4legacy | 1004 | Bowman, Adam (1643) | Lost 0-2 | -131396 |
| 5legacy | 1004 | Judge, Tom (1476) | Lost 1-2 | -171379 |
| 6legacy | 956 | Velez, Reinaldo (1490) | Won 2-1 | +201399 |
| 7legacy | 844 | Van Zee, Will (1351) | Won 2-0 | +171416 |
| 8legacy | 764 | Yambay, David (1601) | Won 2-0 | +221438 |
| top | average opponent: 1512record: 4-4 | new rating: 1438 | ||
| Grand Prix Indianapolis 2016 (modern) | starting rating: 1497 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 318 | Hoylman, Jacob (1500) | Lost 1-2 | -181479 |
| 2modern | 621 | Buzenski, Alexander (1485) | Won 2-1 | +181497 |
| 3modern | 711 | Jackman, Jonathon (1467) | Lost 0-2 | -191478 |
| 4modern | 764 | Throesch, Paul (1481) | Lost 0-2 | -181460 |
| 5modern | 869 | Toro, Andrew (1349) | Lost 1-2 | -201440 |
| 6modern | 816 | Hinkley, Christopher (1445) | Lost 1-2 | -181422 |
| top | average opponent: 1454record: 1-5 | new rating: 1422 | ||
| Grand Prix Columbus 2016 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 67 | Frank, Daniel (1448) | Lost 1-2 | -191481 |
| 2legacy | 497 | Sommercorn, Michael (1482) | Won 2-1 | +181499 |
| 3legacy | 436 | McDowell, Chris (1377) | Won 2-1 | +161515 |
| 4legacy | 305 | Raichlin II, Andrew (1518) | Lost 1-2 | -181497 |
| 5legacy | 502 | Repp, Ryan (1565) | Won 2-1 | +191516 |
| 6legacy | 538 | Seliskar, Stephen (1428) | Lost 0-2 | -191497 |
| top | average opponent: 1470record: 3-3 | new rating: 1497 | ||