Horne Mattos, Marcelo
Current rating: 1504
Record: 6-6
| Grand Prix Sao Paulo 2009 (ARB standard) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 82 | Darlan M Antunes Marin, (1553) | Won 2-0 | +191538 |
| 5standard | 39 | Pereira Junior, Pedro (1583) | Won 2-0 | +191557 |
| 6standard | 7 | Higuera, Andres (1594) | Lost 0-0 | -181539 |
| 7standard | 30 | De Nicola, Nicolas (1561) | Lost 1-2 | -171522 |
| 8standard | 63 | Roca Suarez, Diego (1543) | Lost 1-2 | -181504 |
| average opponent: 1567record: 2-3 | new rating: 1504 | |||
| Grand Prix Buenos Aires 2008 (SHM standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 115 | CARUSSO, MIGUEL (1500) | Won 2-1 | +181518 |
| 2standard | 65 | Carri, Martin (1483) | Won 2-0 | +171535 |
| 3standard | 88 | TOMAS, MARIANO DANIEL (1518) | Lost 0-2 | -181517 |
| 4standard | 170 | Pini, Pablo (1518) | Won 2-1 | +181535 |
| 5standard | 114 | de Oliveira Jr., Ary (1553) | Won 2-1 | +181553 |
| 6standard | 70 | Higuera, Andres (1519) | Lost 0-2 | -181535 |
| 7standard | 71 | Ferrari Spampinato, Gonzalo (1668) | Lost 1-2 | -161519 |
| average opponent: 1537record: 4-3 | new rating: 1519 | |||