Carvalho, Helder
Current rating: 1540
Record: 9-7
| Grand Prix Rio de Janeiro 2013 (GTC standard) | starting rating: 1524 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 94 | Rafael D., (1500) | Won 2-1 | +181542 |
| 2standard | 93 | Moreira Egger, Felipe (1518) | Lost 0-2 | -181524 |
| 3standard | 104 | Luna, Javier (1506) | Won 2-1 | +171541 |
| 4standard | 158 | Salini, Jose (1600) | Won 2-1 | +191560 |
| 5standard | 91 | dos Reis Paim, Paulo Ricardo (1536) | Lost 0-2 | -181542 |
| 6standard | 130 | Iago F., (1517) | Won 2-1 | +171559 |
| 7standard | 94 | de Jesus Freitas, Marcos Paulo (1519) | Lost 1-2 | -181541 |
| 8standard | 134 | Velasquez Jaramillo, R (1524) | Won 2-0 | +171558 |
| 9standard | 87 | Piatti, Julio Cesar (1515) | Lost 0-2 | -181540 |
| average opponent: 1526record: 5-4 | new rating: 1540 | |||
| Grand Prix Porto Alegre 2004 (COK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 90 | Di Frenco De Oliveri, Guilhe (1500) | Won 2-1 | +181518 |
| 2sealed | 55 | Massaro, Luis (1657) | Lost 1-2 | -151503 |
| 3sealed | 114 | Medeiros, Nicholas A (1515) | Lost 0-2 | -181485 |
| 4sealed | 143 | Atkinson, Rogerio (1481) | Won 2-0 | +181503 |
| 5sealed | 109 | Gimenes, Diego (1540) | Won 2-0 | +181521 |
| 6sealed | 60 | Zampere Junior, Celso (1642) | Won 2-1 | +211542 |
| 7sealed | 40 | Capristrani, Ary (1589) | Lost 0-2 | -181524 |
| average opponent: 1561record: 4-3 | new rating: 1524 | |||