Achariyaviriya, Witthawin
Current rating: 1418
Record: 1-7
| Regional Championships Singapore 2023 Cycle 4 (pioneer) | starting rating: 1461 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 6 | Lip, Quinton (1778) | Lost 0-2 | -121449 |
| 2pioneer | 67 | Hoon, Kelvin (1759) | Lost 0-2 | -131436 |
| 3pioneer | 80 | Primicias, James Joash (1445) | Lost 0-2 | -181418 |
| average opponent: 1661record: 0-3 | new rating: 1418 | |||
| Regional Championships Singapore 2022 (pioneer) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 11 | Dungan, Conrad (1637) | Won 2-0 | +201520 |
| 2pioneer | 1 | Yang, Joshua (1859) | Lost 1-2 | -121508 |
| 3pioneer | 45 | Lim, Zhong Yi (1918) | Lost 0-2 | -101498 |
| 4pioneer | 55 | Ang, Glenn (1499) | Lost 1-2 | -181480 |
| 5pioneer | 56 | Primicias, James Joash (1459) | Lost 1-2 | -191461 |
| average opponent: 1674record: 1-4 | new rating: 1461 | |||