Matsumura, Guilherme
Current rating: 1515
Record: 4-4
| Regional Championships Sao Paulo 2023 Cycle 4 (pioneer) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 1 | Damasceno, Eder (1732) | Won 2-0 | +221522 |
| 2pioneer | 32 | Errerias, Caio Vinicius (1538) | Lost 1-2 | -181504 |
| 3pioneer | 38 | Amorim, Rodrigo (1800) | Won 2-0 | +241528 |
| 4pioneer | 13 | Moura, Pedro (1667) | Lost 1-2 | -161512 |
| 5pioneer | 54 | Cesar, Eduardo (1453) | Won 2-1 | +171529 |
| 6pioneer | 30 | Carvalho, Victor (1478) | Won 2-1 | +171546 |
| 7pioneer | 14 | Ferrari, Henrique (1578) | Lost 1-2 | -171529 |
| 8pioneer | 31 | Gomes da Silva Junior, Reinaldo (1743) | Lost 1-2 | -141515 |
| average opponent: 1624record: 4-4 | new rating: 1515 | |||