Papamatheakis, Demosthenes
Current rating: 1427
Record: 7-12-2
| Grand Prix Los Angeles 2014 (KTK standard) | starting rating: 1441 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 432 | Strimple, Timothy (1463) | Lost 0-2 | -181423 |
| 2standard | 626 | Noad, Aaron (1482) | Won 2-0 | +191442 |
| 3standard | 452 | Ebon, Edwin (1569) | Lost 0-2 | -151427 |
| top | average opponent: 1504record: 1-2 | new rating: 1427 | ||
| Grand Prix Toronto 2006 (DIS limited) | starting rating: 1435 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 62 | Pereira, Jake (1500) | Won 2-0 | +191454 |
| 2sealed | 114 | Stoddart, Darrell W (1518) | Draw 1-1 | +11455 |
| 3sealed | 76 | Burkhart, Nick (1518) | Won 2-0 | +191474 |
| 4sealed | 62 | Daoust, Guillaume (1655) | Lost 0-2 | -151459 |
| 5sealed | 106 | Marshall, Shawn (1440) | Lost 0-1 | -181441 |
| top | average opponent: 1526record: 2-2-1 | new rating: 1441 | ||
| Grand Prix London 2003 (Onslaught block) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 14 | Holzelius, Stefan (1518) | Lost 0-2 | -171448 |
| 3block | 141 | Stephenson, Calum (1479) | Lost 0-2 | -171431 |
| 4block | 201 | Lecamu, Christophe (1481) | Won 2-0 | +191450 |
| 5block | 132 | Overstreet, Michael (1498) | Won 2-0 | +191469 |
| 6block | 125 | Taylor, Ryan [ENG] (1523) | Lost 1-2 | -171452 |
| 7block | 115 | Roumanille, Stephane (1499) | Lost 0-2 | -171435 |
| top | average opponent: 1500record: 2-4 | new rating: 1435 | ||
| Grand Prix Naples 2002 (TOR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 72 | Scotto D'Aniello, Vinc (1500) | Lost 1-2 | -181482 |
| 2sealed | 74 | Issi, Sergio (1481) | Draw 1-1 | 01482 |
| 3sealed | 111 | Fedriga, Stefano (1570) | Lost 1-2 | -161466 |
| 4sealed | 133 | Ben M Barek, Mounir (1464) | Won 2-1 | +181484 |
| 5sealed | 114 | Prota, Alexis (1482) | Lost 1-2 | -181466 |
| 6sealed | 114 | Profeti, Luca (1480) | Lost 1-2 | -181448 |
| 7sealed | 112 | Orrico, Francesco (1425) | Won 2-0 | +171465 |
| top | average opponent: 1486record: 2-4-1 | new rating: 1465 | ||