Koh, Chien Shen
Current rating: 1394
Record: 2-8
| Grand Prix Singapore 2009 (extended) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 103 | Lim, Han Tiong (1500) | Lost 1-2 | -181445 |
| 2extended | 114 | Gho, Delvin (1501) | Lost 1-2 | -171428 |
| 3extended | 126 | Pang, Kok Meng (1463) | Lost 0-2 | -171411 |
| 4extended | 173 | Guevara, Mark (1445) | Lost 1-2 | -171394 |
| average opponent: 1477record: 0-4 | new rating: 1394 | |||
| Grand Prix Singapore 2007 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 120 | Woo, Jason (1500) | Lost 0-2 | -181482 |
| 3extended | 124 | Chia, Bing Hong (1507) | Lost 1-2 | -181464 |
| 4extended | 161 | Cho, Zheng Heng (1428) | Won 2-0 | +181482 |
| 5extended | 145 | Thian, Tony Tai Kwong (1483) | Lost 0-2 | -181464 |
| 6extended | 138 | See, Joeshin (1423) | Lost 0-2 | -191445 |
| 7extended | 129 | Tan, Wei Hao Joshua (1426) | Won 2-0 | +181463 |
| average opponent: 1461record: 2-4 | new rating: 1463 | |||