Koba, John
Current rating: 1401
Record: 4-10-1
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 757 | Pastore, Philip (1500) | Draw 1-1 | +11449 |
| 2sealed | 529 | Benner, James (1574) | Lost 1-2 | -161433 |
| 3sealed | 991 | Liu, Liming (1493) | Lost 0-2 | -171416 |
| 4sealed | 1009 | Ablack, Mukesh (1459) | Lost 0-2 | -171399 |
| 5sealed | 961 | Maenpaa, James (1446) | Won 2-1 | +191418 |
| 6sealed | 2172 | Anderson, Charles (1463) | Lost 0-2 | -171401 |
| top | average opponent: 1489record: 1-4-1 | new rating: 1401 | ||
| Grand Prix Las Vegas 2017 (legacy) (legacy) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 526 | Kittinger, Joel (1443) | Won 2-0 | +181500 |
| 2legacy | 429 | Brown, Alex 2747 (1562) | Lost 0-2 | -171483 |
| 3legacy | 720 | Steiner, Jacob (1535) | Lost 0-2 | -171466 |
| 4legacy | 915 | Nishimura, Reid (1477) | Lost 1-2 | -181448 |
| top | average opponent: 1504record: 1-3 | new rating: 1448 | ||
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 189 | Lisonbee, Rich (1548) | Lost 0-2 | -171483 |
| 2sealed | 313 | Stewart, Bianca (1482) | Won 2-1 | +181501 |
| 3sealed | 216 | Haupt, Nicholas (1498) | Lost 0-2 | -181483 |
| 4sealed | 316 | Gregory, Kristopher (1481) | Won 2-1 | +181501 |
| 5sealed | 286 | Juarez, Jessan (1474) | Lost 0-2 | -191482 |
| top | average opponent: 1497record: 2-3 | new rating: 1482 | ||