Idema, Marnix
Current rating: 1525
Record: 6-6
| Grand Prix Brussels 2015 (BFZ standard) | starting rating: 1507 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 113 | Kall, Marian (1515) | Won 2-0 | +181525 |
| 4standard | 187 | Romerio, Lorenzo (1532) | Won 2-0 | +181543 |
| 5standard | 61 | Goddik, Hans Jacob (1847) | Lost 0-2 | -131530 |
| 6standard | 110 | Schafer, Carsten (1741) | Won 2-0 | +221552 |
| 7standard | 106 | Olarte Ovalle, Alvaro Edward (1790) | Lost 1-2 | -141538 |
| 8standard | 208 | Vuillot, Samuel (1790) | Lost 0-2 | -131525 |
| average opponent: 1703record: 3-3 | new rating: 1525 | |||
| Grand Prix Utrecht 2014 (M15 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 102 | De Graaf, Hans (1500) | Won 2-0 | +181518 |
| 2standard | 157 | Karlsson, Malthe (1493) | Won 2-1 | +181536 |
| 3standard | 108 | Houtekamer, Jason (1536) | Won 2-0 | +181554 |
| 4standard | 143 | Ramis Pascual, Toni (1926) | Lost 0-2 | -121542 |
| 5standard | 166 | Sardjan, Danny (1589) | Lost 1-2 | -171525 |
| 6standard | 283 | Grimm, Phillip (1518) | Lost 1-2 | -181507 |
| average opponent: 1594record: 3-3 | new rating: 1507 | |||