Guerreiro, Matheus
Current rating: 1473
Record: 7-9
| Regional Championships Sao Paulo 2023 Cycle 3 (pioneer) | starting rating: 1508 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 8 | Baggio, Giancarlo (1467) | Lost 1-2 | -191489 |
| 2pioneer | 51 | Barbosa Campos Filho, Afranio Jorge (1595) | Lost 1-2 | -161473 |
| 3pioneer | 65 | Bellezza, Emmanuel (1470) | Won 2-0 | +181491 |
| 4pioneer | 67 | Bigaton, Pedro (1429) | Won 2-1 | +171508 |
| 5pioneer | 39 | Hussam, Muhammad (1544) | Lost 1-2 | -181490 |
| 6pioneer | 46 | Rocha, Bruno [BRA] (1491) | Lost 0-2 | -181472 |
| 7pioneer | 47 | Leal, Felipe (1440) | Won 2-0 | +181490 |
| 8pioneer | 42 | Lima Hofer, Joao Pedro (1541) | Lost 0-2 | -171473 |
| average opponent: 1497record: 3-5 | new rating: 1473 | |||
| Regional Championships Sao Paulo 2023 (ONE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 58 | Moura, Pedro (1500) | Lost 0-2 | -181482 |
| 2standard | 43 | Boschi, Artur (1422) | Won 2-1 | +171499 |
| 3standard | 36 | Torres, Thiago (1449) | Lost 0-2 | -191480 |
| 4standard | 49 | Anzolin, Pedro (1485) | Won 2-0 | +181498 |
| 5standard | 26 | Vasconcellos Athayde, Tiago (1580) | Won 2-0 | +201518 |
| 6standard | 53 | Brasil Junior, Claudinei (1685) | Lost 0-2 | -151503 |
| 7standard | 40 | Fernando Silva, Victor (1818) | Won 2-1 | +231526 |
| 8standard | 51 | Marinho Borges, Igor (1494) | Lost 1-2 | -181508 |
| average opponent: 1554record: 4-4 | new rating: 1508 | |||