Koss, Collin
Current rating: 1474
Record: 2-4
| Grand Prix Sacramento 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 93 | Ferraro, Casey (1761) | Lost 0-2 | -131487 |
| 3sealed | 480 | Day, Mark (1572) | Won 2-1 | +191506 |
| 4sealed | 282 | Johnston, Joel (1543) | Won 2-0 | +191525 |
| 5sealed | 80 | Sherman, Sam (1900) | Lost 0-2 | -121513 |
| 6sealed | 301 | Gomez, Adrian (1388) | Lost 1-2 | -201493 |
| 7sealed | 323 | McKittrick, Richard (1437) | Lost 0-2 | -191474 |
| average opponent: 1600record: 2-4 | new rating: 1474 | |||