Helsen, Stef
Current rating: 1605
| Grand Prix Amsterdam 2011 (legacy) | starting rating: 1535 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 602 | Rauscher, Michael (1410) | Won 2-0 | +161551 |
| 2legacy | 626 | Geurts, Peter H (1518) | Draw 1-1 | -11550 |
| 3legacy | 724 | Franzoni, Federico (1518) | Won 2-0 | +171567 |
| 4legacy | 728 | Batteau, Cedric (1596) | Lost 1-2 | -171550 |
| 5legacy | 807 | Boere, Joren (1553) | Won 2-0 | +181568 |
| 6legacy | 739 | Peille, Clement (1714) | Won 2-0 | +211589 |
| 7legacy | 680 | Kowalski, Grzegorz (1603) | Lost 0-2 | -181571 |
| 8legacy | 735 | Kreis, Benjamin (1503) | Won 2-1 | +171588 |
| 9legacy | 693 | Ortmann, Bjoern (1544) | Won 2-1 | +171605 |
| top | average opponent: 1551record: 6-2-1 | new rating: 1605 | ||
| Grand Prix Leipzig 2005 (BOK limited) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 22 | Wild, Florian (1555) | Lost 0-2 | -161453 |
| 5sealed | 62 | Collinet, Patrick (1650) | Won 2-0 | +211474 |
| 6sealed | 17 | van Zutphen, Ronald (1566) | Lost 0-2 | -161458 |
| 7sealed | 67 | Gustavsson, Gustav (1500) | Won 2-1 | +191477 |
| 8sealed | 57 | Zaadstra, David (1534) | Won 1-0 | +191496 |
| 9sealed | 28 | Seemann, Philipp (1579) | Won 2-0 | +191515 |
| 10draft | 25 | Hajek, Jorn (1767) | Lost 0-2 | -131502 |
| 11draft | 17 | Pedersen, Soren (1610) | Won 2-1 | +201522 |
| 12draft | 31 | Le Montagner, Mathieu (1699) | Lost 0-2 | -151507 |
| 13draft | 26 | Szegho, Dalibor (1702) | Won 2-1 | +221529 |
| 14draft | 25 | Fries, Stefan (1859) | Lost 0-2 | -131516 |
| 15draft | 38 | Ligionis, Ignas (1539) | Won 2-1 | +191535 |
| top | average opponent: 1630record: 7-5 | new rating: 1535 | ||
| Grand Prix Eindhoven 2005 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 14 | Wakuluk, Pawel (1594) | Lost 0-2 | -161484 |
| 2extended | 398 | Rinkens, Remco (1483) | Won 2-1 | +181502 |
| 3extended | 267 | Jurkovic, Robert (1714) | Lost 0-2 | -141488 |
| 4extended | 352 | Verschoor, Patrick (1482) | Won 2-0 | +171505 |
| 5extended | 260 | Weinberger, Andre (1516) | Lost 1-2 | -171488 |
| 6extended | 332 | Tang, Ming (1481) | Lost 0-2 | -191469 |
| 7extended | 303 | Koning, Thomas (1469) | Lost 1-2 | -181451 |
| 8extended | 248 | Licht, Thorsten (1444) | Won 2-0 | +181469 |
| top | average opponent: 1523record: 3-5 | new rating: 1469 | ||