Decker, Umberto
Current rating: 1429
Record: 4-8-1
| Grand Prix Prague 2018 (modern) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 135 | Zintl, Fabian (1482) | Won 2-1 | +181516 |
| 2modern | 285 | Kocet, Aleksandar (1498) | Won 2-0 | +171533 |
| 3modern | 345 | Kral, Michal (1592) | Lost 0-2 | -171516 |
| 4modern | 600 | Immerzeel, Nick (1539) | Lost 0-2 | -171499 |
| 5modern | 450 | Rommel, Phillip (1520) | Lost 0-2 | -181481 |
| 6modern | 704 | Gerlach, Maximilian (1507) | Lost 0-2 | -171464 |
| 7modern | 685 | Loffler, Maximilian (1532) | Lost 0-2 | -171447 |
| 8modern | 618 | Janac, Jakub (1451) | Lost 1-2 | -181429 |
| average opponent: 1515record: 2-6 | new rating: 1429 | |||
| Grand Prix Lyon 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 531 | Miranda-Cortes, Gael (1446) | Draw 1-1 | -11499 |
| 2modern | 485 | Holzle, Dennis (1485) | Won 2-1 | +181517 |
| 3modern | 445 | Verbiest, Bart (1657) | Lost 0-2 | -161501 |
| 4modern | 669 | Hoerbinger, Daniel (1410) | Won 2-0 | +171518 |
| 5modern | 444 | Leroy, Quentin (1415) | Lost 0-2 | -201498 |
| average opponent: 1483record: 2-2-1 | new rating: 1498 | |||