Tacha, Joachim
Current rating: 1426
Record: 5-10
| Grand Prix Warsaw 2016 (KLD standard) | starting rating: 1477 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 87 | Adamski, Pawel (1445) | Lost 1-2 | -191458 |
| 2standard | 320 | Bratu, Cosmin (1463) | Lost 0-2 | -181440 |
| 3standard | 515 | Karpov, Pavel (1548) | Lost 1-2 | -161424 |
| 4standard | 529 | Moretti, Luca (1466) | Lost 0-2 | -171407 |
| 5standard | 532 | Chmielewski, Damian (1429) | Won 2-0 | +181425 |
| 6standard | 507 | Haarmann, Oliver (1452) | Won 2-0 | +191444 |
| 7standard | 459 | Kubala, Jakub (1469) | Lost 0-2 | -181426 |
| average opponent: 1468record: 2-5 | new rating: 1426 | |||
| Grand Prix Prague 2015 (ORI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 235 | Maly, Ondrej (1710) | Won 2-0 | +221522 |
| 2standard | 35 | Kladiva, Milan (1603) | Lost 1-2 | -171505 |
| 3standard | 500 | Keselak, Ondrej (1500) | Won 2-1 | +181523 |
| 4standard | 220 | Stormer, Florian (1516) | Won 2-0 | +181541 |
| 5standard | 244 | Colla, Davide (1675) | Lost 1-2 | -161525 |
| 6standard | 262 | Van Koekenbeek, Benjamin (1642) | Lost 1-2 | -151510 |
| 7standard | 376 | Nadler, Matthias (1658) | Lost 0-2 | -161494 |
| 8standard | 347 | Katerinov, Delian (1511) | Lost 1-2 | -171477 |
| average opponent: 1602record: 3-5 | new rating: 1477 | |||