Masson, Ruan
Current rating: 1465
Record: 1-3-1
| Grand Prix Porto Alegre 2004 (COK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 110 | Oliveira, Eduardo (1500) | Won 2-0 | +181518 |
| 2sealed | 9 | Capristrani, Ary (1576) | Lost 0-2 | -171501 |
| 3sealed | 64 | Bittencourt Olmi, Douglas (1500) | Lost 0-2 | -181483 |
| 4sealed | 150 | Calcas Neto, Thiago (1499) | Lost 0-2 | -181465 |
| 5sealed | 141 | Marostica Soares, Juliano (1464) | Draw 1-1 | 01465 |
| average opponent: 1508record: 1-3-1 | new rating: 1465 | |||