Omielchuk, Roger
Current rating: 1500
Record: 8-8
| Grand Prix Porto Alegre 2017 (AER standard) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 41 | Mello, Ronaldo (1500) | Won 2-1 | +181537 |
| 2standard | 65 | Arntz, Estevao Rudi (1545) | Lost 0-2 | -181519 |
| 3standard | 186 | Ponciano, Matheus (1501) | Lost 1-2 | -191500 |
| 4standard | 224 | Coutinho, Thiago (1414) | Lost 0-2 | -191481 |
| 5standard | 248 | Fonseca, Lucas (1469) | Won 2-0 | +181499 |
| 6standard | 202 | Toledo, Marlus (1576) | Lost 0-2 | -171482 |
| 7standard | 217 | Martins, Rafael (1468) | Lost 1-2 | -181464 |
| 8standard | 197 | Saldivar, Manuel (1484) | Won 2-0 | +181482 |
| 9standard | 170 | Soares Lee, Alexandre (1448) | Won 2-1 | +181500 |
| average opponent: 1489record: 4-5 | new rating: 1500 | |||
| Grand Prix Porto Alegre 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 146 | Grotti, Rodrigo (1505) | Won 2-0 | +181518 |
| 2modern | 135 | Choji, Cezar (1602) | Lost 0-2 | -161502 |
| 3modern | 273 | da Silva Moncks Valerio, Igor (1500) | Lost 0-2 | -181484 |
| 4modern | 303 | Nonnig, Andre (1482) | Won 2-0 | +181502 |
| 5modern | 247 | Bonfim, Henrique (1507) | Won 2-0 | +181520 |
| 6modern | 216 | Kayo Kiyan, Danilo (1516) | Won 2-1 | +181538 |
| 7modern | 79 | Conrado, Alexandre (1500) | Lost 1-2 | -191519 |
| average opponent: 1516record: 4-3 | new rating: 1519 | |||