De Margon, Cosme
Current rating: 1415
| Grand Prix Bologna 2017 (AKH limited) | starting rating: 1425 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 317 | Civati, Andrea (1486) | Draw 1-1 | +11426 |
| 2sealed | 368 | Moneta, Davide (1500) | Won 2-1 | +191445 |
| 3sealed | 431 | Oliveira, Goncalo (1584) | Lost 1-2 | -151430 |
| 4sealed | 571 | Kopfli, Hugo (1509) | Draw 1-1 | +11431 |
| 5sealed | 658 | Angelini, Marco (1503) | Draw 1-1 | +21433 |
| 6sealed | 591 | Saccani, Nicola (1485) | Draw 1-1 | +11434 |
| 7sealed | 606 | Scherl, Simon (1418) | Lost 0-2 | -191415 |
| top | average opponent: 1498record: 1-2-4 | new rating: 1415 | ||
| Grand Prix Lille 2016 (modern) | starting rating: 1442 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 315 | Belmans, Ben (1283) | Draw 1-1 | -31439 |
| 2modern | 411 | Gottfried, Thiebaut (1470) | Lost 0-2 | -181421 |
| 3modern | 749 | Agne, Amaduu (1485) | Won 2-0 | +201441 |
| 4modern | 579 | Heck, Tobias (1479) | Lost 1-2 | -181423 |
| 5modern | 693 | Parize, Antoine (1479) | Lost 1-2 | -171406 |
| 6modern | 751 | Huygen, Onno (1438) | Won 2-0 | +191425 |
| top | average opponent: 1439record: 2-3-1 | new rating: 1425 | ||
| Grand Prix Paris 2015 (DTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 71 | Garus, Henning (1508) | Lost 1-2 | -181482 |
| 2standard | 443 | Oria, Antoine (1229) | Lost 0-2 | -221460 |
| 3standard | 635 | Pedone, Sebastien (1464) | Lost 1-2 | -181442 |
| top | average opponent: 1401record: 0-3 | new rating: 1442 | ||