Koos, Alexander
Current rating: 1493
Record: 5-6
| Grand Prix Bologna 2019 (legacy) | starting rating: 1468 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 88 | Poschet, Elmar (1496) | Lost 0-2 | -181450 |
| 2legacy | 590 | Swiecki, Robert (1544) | Won 2-1 | +201470 |
| 3legacy | 446 | Krisevich, Maxim (1426) | Won 2-1 | +171487 |
| 4legacy | 196 | Bach, Wolfgang (1787) | Lost 0-2 | -131474 |
| 5legacy | 550 | Skov Pedersen, Troels (1479) | Won 2-0 | +181492 |
| 6legacy | 340 | Tuccinardi, Leone (1514) | Won 2-1 | +191511 |
| 7legacy | 305 | Venturini, Stefano (1550) | Lost 1-2 | -181493 |
| average opponent: 1542record: 4-3 | new rating: 1493 | |||
| Grand Prix Prague 2019 (UMA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 990 | Feichtinger, Christian (1388) | Lost 1-2 | -201480 |
| 2sealed | 1027 | Goncarov, Jan (1574) | Lost 0-2 | -161464 |
| 3sealed | 1172 | Borcevsky, Pavel (1683) | Lost 0-2 | -141450 |
| 4sealed | 1113 | Wilkosz, Jakub (1447) | Won 2-0 | +181468 |
| average opponent: 1523record: 1-3 | new rating: 1468 | |||