Van Duijn, Joost
Current rating: 1517
Record: 8-8-2
| Grand Prix Amsterdam 2017 (AKH standard) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 61 | Harbaliev, Yancho (1500) | Draw 1-1 | -11516 |
| 2standard | 249 | Pennanen, Teemu (1497) | Won 2-1 | +181534 |
| 3standard | 313 | Schaap, Rowan (1475) | Won 2-1 | +171551 |
| 4standard | 170 | Boudjema, Charly (1941) | Draw 1-1 | +71558 |
| 5standard | 283 | Mori, Roger (1383) | Lost 1-2 | -211537 |
| 6standard | 370 | Veen, Joeri (1470) | Lost 0-2 | -201517 |
| average opponent: 1545record: 2-2-2 | new rating: 1517 | |||
| Grand Prix Utrecht 2017 (AER standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 216 | Wack, Quentin (1556) | Won 2-1 | +191519 |
| 2standard | 86 | Giorgetti, Cesare (1518) | Won 2-0 | +181537 |
| 3standard | 186 | Rusman, Han (1537) | Won 2-0 | +181555 |
| 4standard | 123 | Lindstrom, Martin (1952) | Lost 0-2 | -111544 |
| 5standard | 115 | Muller, Jim (1525) | Won 2-0 | +181562 |
| 6standard | 114 | Lindgren, Tommi (1770) | Lost 0-2 | -151547 |
| 7standard | 221 | Colin, Antoine (1571) | Won 2-0 | +191566 |
| 8standard | 150 | Milbrat, Tobias (1598) | Lost 0-2 | -181548 |
| 9standard | 193 | Harrison, Anne (1448) | Won 2-0 | +161564 |
| 10standard | 186 | Szwebs, Michal (1599) | Lost 0-2 | -171547 |
| 11standard | 170 | Kalin, Felix (1548) | Lost 0-2 | -181529 |
| 12standard | 172 | Linden, Carsten (1845) | Lost 1-2 | -121517 |
| average opponent: 1622record: 6-6 | new rating: 1517 | |||