Dekker, Maarten
Current rating: 1481
Record: 15-18-2
| Grand Prix London 2016 (KLD limited) | starting rating: 1452 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 839 | Dinter, Ralf (1394) | Draw 1-1 | -11451 |
| 2sealed | 599 | Moore, Matthew1400 (1502) | Won 2-0 | +191470 |
| 3sealed | 526 | Wolf, Vanessa (1494) | Lost 1-2 | -171453 |
| 4sealed | 801 | Bianco, Nicholas (1498) | Won 2-1 | +181471 |
| 5sealed | 525 | Cremin, Joshua (1534) | Won 2-1 | +201491 |
| 6sealed | 332 | Tufvesson, Linus (1595) | Lost 0-2 | -171474 |
| 7sealed | 529 | Bullack, Malte (1518) | Won 2-0 | +191493 |
| 8sealed | 358 | Klocker, Elias (1793) | Lost 0-2 | -121481 |
| 9sealed | 507 | Brincat, Adam (1517) | Draw 1-1 | 01481 |
| top | average opponent: 1538record: 4-3-2 | new rating: 1481 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1491 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1152 | Devis, Larry (1382) | Lost 1-2 | -201471 |
| 2sealed | 1292 | Hansson, Mattias (1521) | Lost 1-2 | -171454 |
| 3sealed | 1463 | Hop, Aart (1377) | Won 2-0 | +171471 |
| 4sealed | 1400 | Porcher, Cesar (1457) | Lost 0-2 | -191452 |
| top | average opponent: 1434record: 1-3 | new rating: 1452 | ||
| Grand Prix Prague 2013 (M14 limited) | starting rating: 1460 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 170 | Bresser, Nick (1424) | Won 2-0 | +181478 |
| 2sealed | 195 | Steinsdoerfer, Daniel (1745) | Won 2-0 | +221500 |
| 3sealed | 125 | Lundgren, Jimmy (1522) | Lost 0-2 | -171483 |
| 4sealed | 355 | Lauro, Davide (1477) | Lost 1-2 | -181465 |
| 5sealed | 492 | Hanfstengel, Emil (1499) | Won 2-0 | +181483 |
| 6sealed | 355 | Zywczyk, Michal (1513) | Won 2-1 | +191502 |
| 7sealed | 281 | Vanek, Tomas (1788) | Lost 1-2 | -131489 |
| 8sealed | 295 | Llimos Muntal, Pere (1562) | Won 2-1 | +191508 |
| 9sealed | 244 | Jean, Benjamin (1549) | Lost 1-2 | -171491 |
| top | average opponent: 1564record: 5-4 | new rating: 1491 | ||
| Grand Prix Paris 2009 (ZEN limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 789 | Morera, Laurent (1483) | Won 2-1 | +181482 |
| 2sealed | 803 | Bittner, Jacques (1660) | Won 2-1 | +221504 |
| 3sealed | 682 | Ziesche, Sebastian (1747) | Won 2-0 | +221526 |
| 4sealed | 720 | Harding, Oyvind (1736) | Lost 0-2 | -141512 |
| 5sealed | 736 | Dziedzicki, Jean-Pierre (1510) | Won 2-0 | +181530 |
| 6sealed | 674 | Filler, Michael (1519) | Lost 1-2 | -181512 |
| 7sealed | 693 | Dordain, Iann (1490) | Lost 0-2 | -191493 |
| 8sealed | 770 | Beckmann, Bertram (1651) | Lost 0-2 | -151478 |
| 9sealed | 722 | Cordeiro, Peter (1500) | Lost 1-2 | -181460 |
| top | average opponent: 1589record: 4-5 | new rating: 1460 | ||
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 418 | Koers, Kenta (1500) | Lost 1-2 | -181482 |
| 2sealed | 586 | Van Bokhoven, Ad (1482) | Lost 0-2 | -181464 |
| 3sealed | 647 | Vogel, Alexander (1466) | Won 2-0 | +181482 |
| 4sealed | 631 | Croom, David (1482) | Lost 0-2 | -181464 |
| top | average opponent: 1482record: 1-3 | new rating: 1464 | ||