Van Der Waerden, Jaap
Current rating: 1521
Record: 3-2
| Grand Prix Rotterdam 2009 (CON limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 110 | Vries De, Edwin (1500) | Won 2-0 | +181518 |
| 2sealed | 113 | Le Montagner, Mathieu (1642) | Lost 1-2 | -161502 |
| 3sealed | 141 | Alvarez Jorge, Gabriel (1576) | Lost 0-2 | -161486 |
| 4sealed | 229 | Stricker, Martijn (1481) | Won 2-0 | +181504 |
| 5sealed | 202 | Helgason, Egill (1467) | Won 2-1 | +171521 |
| average opponent: 1533record: 3-2 | new rating: 1521 | |||