De Kock, Jonathan
Current rating: 1441
| Grand Prix Melbourne 2016 (modern) | starting rating: 1454 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 173 | Howes, Callum (1500) | Won 2-0 | +191473 |
| 2modern | 87 | Hua, Ye (1519) | Lost 1-2 | -171456 |
| 3modern | 248 | Chrisp, Sarah (1468) | Lost 0-2 | -181438 |
| 4modern | 436 | Palmier, Rebekah (1395) | Won 2-0 | +171455 |
| 5modern | 378 | Sanders, Michael [NZL] (1501) | Lost 0-2 | -171438 |
| 6modern | 424 | Brook, Alex (1481) | Won 2-0 | +191457 |
| 7modern | 281 | Buchan, Lachlan (1573) | Lost 0-2 | -161441 |
| top | average opponent: 1491record: 3-4 | new rating: 1441 | ||
| Grand Prix Melbourne 2014 (BNG standard) | starting rating: 1490 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 244 | Mulcahy, Stephen (1482) | Lost 1-2 | -181472 |
| 2standard | 252 | Bentley, Shaun (1482) | Won 2-0 | +181490 |
| 3standard | 274 | Noble, David [AUS] (1472) | Lost 0-2 | -181472 |
| 4standard | 336 | Xuan, James (1483) | Lost 0-2 | -181454 |
| top | average opponent: 1480record: 1-3 | new rating: 1454 | ||
| Grand Prix Sydney 2013 (RTR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 226 | Lightfoot, Anatoli (1779) | Lost 1-2 | -131487 |
| 2sealed | 197 | Head, Adam (1464) | Lost 0-2 | -181469 |
| 3sealed | 296 | jayaraman, vinodh (1464) | Won 2-0 | +171486 |
| 4sealed | 283 | Murnain, Alaric (1495) | Won 2-1 | +191505 |
| 5sealed | 202 | Schafer, Ross (1698) | Lost 0-2 | -151490 |
| top | average opponent: 1580record: 2-3 | new rating: 1490 | ||