Martin, Johnathon
Current rating: 1564
Record: 9-7
| Grand Prix Richmond 2018 (std) (M19 standard) | starting rating: 1511 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 128 | Sipe, Eric (1628) | Lost 1-2 | -161495 |
| 2standard | 210 | Rehor, Joey (1480) | Won 2-0 | +181513 |
| 3standard | 242 | Smith, Zachary (1546) | Won 2-0 | +181531 |
| 4standard | 155 | Heinricy, Landan (1398) | Won 2-0 | +161547 |
| 5standard | 120 | Carey, Bryan (1949) | Won 2-0 | +251572 |
| 6standard | 61 | Jette, Francis (1666) | Won 2-0 | +191591 |
| 7standard | 68 | Maginnis, Peter (1983) | Lost 1-2 | -111580 |
| 8standard | 104 | Clark, Mason (1662) | Lost 0-2 | -161564 |
| average opponent: 1664record: 5-3 | new rating: 1564 | |||
| Grand Prix Washington DC 2017 (HOU standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 246 | Gardner, Christian (1500) | Won 2-0 | +181518 |
| 2standard | 197 | Pena, Edwin (1670) | Lost 1-2 | -151503 |
| 3standard | 425 | Babcock, Gary (1456) | Won 2-0 | +171520 |
| 4standard | 413 | Little, Adrian (1537) | Lost 1-2 | -181502 |
| 5standard | 516 | Wilhelm, Thomas (1504) | Won 2-0 | +181520 |
| 6standard | 436 | Darr, Dane (1502) | Lost 1-2 | -181502 |
| 7standard | 533 | Pencak, William (1519) | Won 2-0 | +181520 |
| 8standard | 311 | Cochran, Hunter (2026) | Lost 1-2 | -91511 |
| average opponent: 1589record: 4-4 | new rating: 1511 | |||