Koh, Mark Hsien Loong
Current rating: 1466
| Grand Prix Bangkok 2013 (DGM limited) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 163 | Vichaphund, Sav (1535) | Lost 0-2 | -171485 |
| 2sealed | 261 | Eing Yung, Lee (1439) | Lost 0-2 | -191466 |
| 3sealed | 311 | Singwongwatana, Sinwon (1463) | Won 2-1 | +181484 |
| 4sealed | 288 | Henry, Anthony (1480) | Lost 0-2 | -181466 |
| top | average opponent: 1480record: 1-3 | new rating: 1466 | ||
| Grand Prix Singapore 2013 (RTR limited) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 121 | Kwang, Patrick (1500) | Won 2-0 | +181516 |
| 2sealed | 173 | Schafer, Ross (1697) | Lost 0-2 | -151501 |
| 3sealed | 267 | Leonardo, Edward (1539) | Won 2-1 | +191520 |
| 4sealed | 240 | Lee, Robert (1557) | Lost 0-2 | -181502 |
| top | average opponent: 1573record: 2-2 | new rating: 1502 | ||
| Grand Prix Singapore 2011 (NPH standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 93 | Sirichokchatchawan, Wa (1500) | Won 2-0 | +181518 |
| 2standard | 1 | Kwek, Shane (1518) | Lost 0-2 | -181500 |
| 3standard | 124 | Mendoza, Paul (1625) | Won 2-0 | +201520 |
| 4standard | 157 | Kusakabe, Shuichi (1505) | Won 2-0 | +181538 |
| 5standard | 95 | Lv, Jiachong (1327) | Lost 1-2 | -221516 |
| 6standard | 130 | Ng, Chong Leng (1495) | Lost 0-2 | -181498 |
| top | average opponent: 1495record: 3-3 | new rating: 1498 | ||