Prayoonthien, Nonthasa
Current rating: 1417
Record: 2-7
| Grand Prix Bangkok 2013 (DGM limited) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 134 | Koh, Kai Che (1500) | Won 2-0 | +191488 |
| 2sealed | 142 | Booncharoen, Rittikorn (1492) | Lost 1-2 | -181470 |
| 3sealed | 147 | Ng, Yung Sern (1485) | Lost 1-2 | -181452 |
| 4sealed | 321 | Pongsiripoj, Khunat (1480) | Lost 0-2 | -171435 |
| 5sealed | 314 | Singwongwatana, Sinwon (1461) | Lost 0-2 | -181417 |
| average opponent: 1484record: 1-4 | new rating: 1417 | |||
| Grand Prix Bangkok 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 36 | Asinas, Rudi Jason (1499) | Lost 1-2 | -181482 |
| 2sealed | 98 | Van Cleave, Trey (1796) | Won 2-0 | +241506 |
| 3sealed | 82 | Jerasakarenon, Perapat (1499) | Lost 0-2 | -191487 |
| 4sealed | 187 | Uyanont, Vuttawat (1479) | Lost 1-2 | -181469 |
| average opponent: 1568record: 1-3 | new rating: 1469 | |||