Mario Manzieri,
Current rating: 1498
Record: 2-2-1
| Grand Prix Sao Paulo 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 76 | Jonatas Quintino, (1500) | Won 2-0 | +181518 |
| 2standard | 111 | Oliveira Vieira Basili, Samuel (1518) | Lost 1-2 | -181500 |
| 3standard | 228 | Gomes dos Santos, Fabiano (1466) | Draw 1-1 | -11499 |
| 4standard | 214 | Dennis F Lobo, (1482) | Won 2-0 | +181517 |
| 5standard | 158 | Braga Peres, Denys (1469) | Lost 0-2 | -191498 |
| average opponent: 1487record: 2-2-1 | new rating: 1498 | |||