Jacob, Igor da Fonseca
Current rating: 1535
Record: 4-2-1
| Grand Prix Curitiba 2001 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 50 | Osawa, Ricardo Yoshio (1500) | Lost 1-2 | -181482 |
| 2extended | 95 | Martinez Pereira Dias, Bruno (1430) | Won 0-0 | +171499 |
| 3extended | 96 | Marques, Raphael Suss (1500) | Won 2-1 | +181517 |
| 4extended | 63 | Rocha, Eduardo (1518) | Draw 1-1 | 01517 |
| 5extended | 87 | Chaga, Carlos Ronald (1517) | Won 2-0 | +181535 |
| 6extended | 58 | Massaro, Luis (1484) | Won 2-1 | +171552 |
| 7extended | 38 | Mendonca, Rafael (1584) | Lost 0-2 | -171535 |
| average opponent: 1505record: 4-2-1 | new rating: 1535 | |||