Decoster, Aaron
Current rating: 1413
Record: 4-9-1
| Grand Prix Bilbao 2019 (modern) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 210 | Sanz, Miguel Angel (1500) | Lost 0-2 | -181468 |
| 2modern | 452 | Alvarez Arcas, Inaki (1483) | Won 2-1 | +181486 |
| 3modern | 583 | Arjona, Ivan (1499) | Lost 1-2 | -181468 |
| 4modern | 638 | Carrillo Sanfiel, Antonio (1482) | Lost 1-2 | -171451 |
| 5modern | 660 | Debesson, Quentin (1383) | Lost 0-2 | -201431 |
| 6modern | 609 | Nelson, Rhodri (1437) | Lost 0-2 | -181413 |
| average opponent: 1464record: 1-5 | new rating: 1413 | |||
| Grand Prix Lyon 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 504 | Patalano, Clement (1500) | Lost 0-2 | -181482 |
| 2modern | 521 | Fourquet, Loic (1483) | Draw 1-1 | 01482 |
| 3modern | 867 | Dambron, Antoine (1669) | Lost 1-2 | -151467 |
| 4modern | 941 | Jamin, Mathieu (1463) | Won 2-0 | +181485 |
| 5modern | 792 | Wyder, Carl (1520) | Won 2-1 | +191504 |
| 6modern | 616 | Sanfilippo, Gianluigi (1472) | Won 2-1 | +171521 |
| 7modern | 446 | Firsching, Christian (1518) | Lost 1-2 | -181503 |
| 8modern | 516 | Romito, Stefano (1514) | Lost 0-2 | -171486 |
| average opponent: 1518record: 3-4-1 | new rating: 1486 | |||