Lenstra, Marc-Jan
Current rating: 1567
Record: 9-6
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 419 | Mayer, Manuel (1647) | Won 2-0 | +211524 |
| 2sealed | 501 | Stender, Hugo (1499) | Won 2-1 | +171541 |
| 3sealed | 456 | Lamprecht, Benjamin (1620) | Won 2-1 | +201561 |
| 4sealed | 447 | Beckmann, Bertram (1690) | Won 2-1 | +201581 |
| 5sealed | 416 | Lippi, Alessandro (1616) | Lost 0-2 | -171564 |
| 6sealed | 436 | Cadier, Ron (1674) | Lost 0-2 | -161548 |
| 7sealed | 523 | Wijsman, Gerwin (1529) | Won 2-1 | +171565 |
| 8sealed | 456 | Longoni, Raphael (1679) | Won 2-1 | +211586 |
| 9sealed | 451 | Mauger, Guillaume (1559) | Lost 1-2 | -191567 |
| average opponent: 1613record: 6-3 | new rating: 1567 | |||
| Grand Prix Eindhoven 2005 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 268 | Verschoor, Krik (1500) | Won 2-0 | +181518 |
| 2extended | 44 | Leuschner, Knut (1499) | Lost 0-2 | -181500 |
| 3extended | 351 | Urban, Lexx (1500) | Won 2-1 | +181518 |
| 4extended | 242 | Mattes, Sebastian (1557) | Won 2-0 | +181536 |
| 5extended | 76 | Pascoli, Mario (1724) | Lost 1-2 | -141522 |
| 6extended | 263 | Meaney, Alan (1493) | Lost 0-2 | -191503 |
| average opponent: 1545record: 3-3 | new rating: 1503 | |||