Deffent, Peter
Current rating: 1533
Record: 19-17-2
| Grand Prix Krakow 2019 (M20 limited) | starting rating: 1557 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 400 | Wright, Mick (1385) | Lost 1-2 | -211536 |
| 2sealed | 542 | Schoen-Reynders, Danilo (1510) | Lost 0-2 | -181518 |
| 3sealed | 461 | Kunitskiy, Maxim (1412) | Won 2-0 | +161534 |
| 4sealed | 404 | Caccia, Alberto (1500) | Won 2-0 | +171551 |
| 5sealed | 289 | Balcer, Szymon (1519) | Lost 0-2 | -181533 |
| top | average opponent: 1465record: 2-3 | new rating: 1533 | ||
| Grand Prix Liverpool 2017 (XLN limited) | starting rating: 1579 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 200 | Boswell, Samuel (1500) | Won 2-0 | +171596 |
| 2sealed | 14 | Lailey, Mark (1744) | Lost 1-2 | -161580 |
| 3sealed | 494 | Kim, Minjae (1497) | Lost 1-2 | -191561 |
| 4sealed | 500 | Roberts, Luke (1438) | Won 2-1 | +161577 |
| 5sealed | 379 | Rensfeldt, Gunnar (1496) | Won 2-0 | +161593 |
| 6sealed | 332 | Mueller, Dominic (1625) | Lost 0-2 | -171576 |
| 7sealed | 283 | Brooks, Sean (1703) | Won 2-0 | +201596 |
| 8sealed | 206 | Fawkes, Anthony (1541) | Lost 1-2 | -191577 |
| 9sealed | 274 | Campbell, Gary (1481) | Lost 0-2 | -201557 |
| top | average opponent: 1558record: 4-5 | new rating: 1557 | ||
| Grand Prix Warsaw 2016 (KLD standard) | starting rating: 1533 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 151 | Ayala, Ernest (1462) | Won 2-1 | +171550 |
| 2standard | 217 | Fajkus, Adam (1651) | Lost 0-2 | -161534 |
| 3standard | 450 | Gotlib, Nathan (1588) | Lost 1-2 | -171517 |
| 4standard | 467 | Brown, Aaron (1409) | Won 2-0 | +161533 |
| 5standard | 430 | Johansson, Alexander (1576) | Won 2-0 | +181551 |
| 6standard | 292 | Bruni, Matteo (1736) | Won 2-0 | +221573 |
| 7standard | 160 | Schupov, Evgeniy (1474) | Won 2-1 | +161589 |
| 8standard | 72 | Alfredsson, Henrik (1628) | Draw 1-1 | +11590 |
| 9standard | 127 | Larsson, Jonatan (1701) | Won 2-1 | +201610 |
| 10standard | 86 | Bienko, Krzysztof (1557) | Won 2-1 | +171627 |
| 11standard | 48 | Desax, Conn (1924) | Lost 0-2 | -131614 |
| 12standard | 88 | Skauen, Fredrik (1584) | Won 2-0 | +171631 |
| 13standard | 58 | Nobari, Poya (1847) | Lost 1-2 | -141617 |
| 14standard | 94 | Bujanowicz, Pawel (1576) | Lost 0-2 | -181599 |
| 15standard | 111 | Eloranta, Joonas (1523) | Lost 0-2 | -201579 |
| top | average opponent: 1616record: 8-6-1 | new rating: 1579 | ||
| Grand Prix London 2016 (KLD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 223 | Copp, Simon (1429) | Lost 1-2 | -191481 |
| 2sealed | 833 | Morley, Simon (1424) | Won 2-0 | +171498 |
| 3sealed | 640 | Leite Slinning, Kim B (1499) | Draw 1-1 | 01498 |
| 4sealed | 802 | Mampaey, Herwig (1522) | Won 2-1 | +181516 |
| 5sealed | 551 | Chemnitz, Dennis (1517) | Won 2-1 | +181534 |
| 6sealed | 345 | Heitler, Nicholas (1535) | Won 2-1 | +181552 |
| 7sealed | 190 | Kronenberg, Menno (1615) | Lost 1-2 | -171535 |
| 8sealed | 376 | Cartwright, Sarah (1557) | Lost 1-2 | -171518 |
| 9sealed | 414 | Dauppe, Claudia (1368) | Won 2-1 | +151533 |
| top | average opponent: 1496record: 5-3-1 | new rating: 1533 | ||