Kotze, Johannes
Current rating: 1414
| Grand Prix Cardiff 2006 (GPT limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 132 | Ravenshear, Stuart (1500) | Lost 0-2 | -171429 |
| 2sealed | 118 | Palomaki, Eero (1483) | Won 0-0 | +191448 |
| 3sealed | 96 | Son, Carl (1500) | Lost 1-2 | -171431 |
| 4sealed | 148 | Christofferson, Dane (1481) | Lost 0-2 | -171414 |
| top | average opponent: 1491record: 1-3 | new rating: 1414 | ||
| Grand Prix Nottingham 2005 (RAV limited) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 170 | Dalley, Kevin (1466) | Lost 0-2 | -181444 |
| 2sealed | 199 | Brueggemann, Julian (1482) | Won 2-0 | +191463 |
| 3sealed | 173 | Hessens, Oliver (1550) | Lost 0-2 | -161447 |
| 4sealed | 210 | Murphy, Lee (1396) | Draw 1-1 | -11446 |
| top | average opponent: 1474record: 1-2-1 | new rating: 1446 | ||
| Grand Prix Birmingham 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 153 | Powell, Richard (1450) | Won 1-0 | +171517 |
| 2sealed | 18 | Quigley, Brendan (1518) | Lost 1-2 | -181499 |
| 3sealed | 135 | Mulcahy, Stephen (1500) | Won 2-1 | +181517 |
| 4sealed | 86 | Keen, Jason (1520) | Lost 0-2 | -181499 |
| 5sealed | 125 | Taylor, Nicholas (1448) | Lost 1-2 | -191480 |
| 6sealed | 174 | Haslam, Paul (1481) | Lost 1-2 | -181462 |
| top | average opponent: 1486record: 2-4 | new rating: 1462 | ||