Ratz, Derek
Current rating: 1398
Record: 1-7
| Grand Prix Toronto 2013 (THS limited) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 436 | Robinson, Adam (1654) | Lost 0-2 | -141431 |
| 2sealed | 522 | Chesnais, Patrick (1465) | Lost 0-2 | -171414 |
| 3sealed | 620 | Goldfarb, Mathew (1528) | Lost 0-2 | -161398 |
| average opponent: 1549record: 0-3 | new rating: 1398 | |||
| Grand Prix Toronto 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 224 | Webb, Brandon (1500) | Lost 0-2 | -181482 |
| 2modern | 294 | Ng, Edward (1482) | Lost 1-2 | -181464 |
| 3modern | 428 | Melanson, Ryan (1463) | Won 2-0 | +181482 |
| 4modern | 349 | Hale, Bryan (1431) | Lost 0-2 | -191463 |
| 5modern | 403 | Manuel, Jonny (1469) | Lost 0-2 | -181445 |
| average opponent: 1469record: 1-4 | new rating: 1445 | |||