Costantinidis, Peter
Current rating: 1516
Record: 7-6
| Grand Prix Las Vegas 2001 (extended) | starting rating: 1497 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 46 | Humphery, John (1500) | Won 2-0 | +181515 |
| 2extended | 94 | Cavaliere, Greg (1452) | Won 2-0 | +161531 |
| 3extended | 56 | Tamblyn, Mitchell (1469) | Lost 1-2 | -191512 |
| 4extended | 116 | Szigeti, Peter (1731) | Won 2-1 | +221534 |
| 5extended | 92 | Thomas, Cole (1551) | Lost 0-2 | -171517 |
| 6extended | 103 | Shipley, Harry (1491) | Lost 0-2 | -191498 |
| 7extended | 103 | Westbrook, Michael (1500) | Won 2-0 | +181516 |
| average opponent: 1528record: 4-3 | new rating: 1516 | |||
| Grand Prix San Diego 1999 (MMQ limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 24 | Yu, Christopher (1500) | Won 0-0 | +181518 |
| 3sealed | 19 | Sas, Ariel (1518) | Won 2-0 | +181536 |
| 4sealed | 15 | Carnan, Richard (1554) | Won 0-0 | +181554 |
| 5sealed | 3 | Szigeti, Peter (1518) | Lost 0-0 | -181536 |
| 6sealed | 21 | D'Tela, Sceadeau (1554) | Lost 1-2 | -181518 |
| 7sealed | 44 | Fung, Jeff (1324) | Lost 0-0 | -211497 |
| average opponent: 1495record: 3-3 | new rating: 1497 | |||