Ong, Weiwah
Current rating: 1584
Record: 22-19
| Grand Prix Singapore 2013 (RTR limited) | starting rating: 1615 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 74 | Cohun, Benson (1650) | Lost 1-2 | -181597 |
| 2sealed | 314 | Gamboa, Djohar (1474) | Won 2-1 | +161613 |
| 3sealed | 197 | Khaw, Chong Lam (1511) | Won 2-0 | +161629 |
| 4sealed | 198 | Nah, Kelvin (1519) | Lost 1-2 | -201609 |
| 5sealed | 244 | How, Wilfred (1553) | Lost 1-2 | -191590 |
| 6sealed | 266 | Goh, Daniel (1483) | Lost 1-2 | -201570 |
| 7sealed | 249 | Phanpakorn, Dolpipop (1538) | Won 2-0 | +181588 |
| 8sealed | 212 | Yin, Zhen Yao (1495) | Lost 1-2 | -201568 |
| 9sealed | 211 | Madin, Azrin (1441) | Won 2-0 | +161584 |
| top | average opponent: 1518record: 4-5 | new rating: 1584 | ||
| Grand Prix Singapore 2009 (extended) | starting rating: 1512 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 51 | Heng, Chye Hwee (1472) | Lost 0-2 | -191493 |
| 3extended | 107 | Erlangga, Reza (1499) | Won 2-0 | +181511 |
| 4extended | 116 | Lau, Wilfred (1537) | Won 2-1 | +181529 |
| 5extended | 69 | Chua, James (1558) | Lost 0-2 | -171512 |
| 6extended | 71 | Lim, Shaun (1517) | Won 2-1 | +181530 |
| 7extended | 63 | Pepper, Patrick (1561) | Won 2-0 | +191549 |
| 8extended | 47 | Yang, Joshua (1829) | Won 2-1 | +231572 |
| 9extended | 34 | Arita, Ryuichi (1907) | Lost 1-2 | -131559 |
| 10extended | 35 | Shi, Xiang (1568) | Lost 0-2 | -171542 |
| 11extended | 35 | Aw Yeong, Weng Kwong (1544) | Won 2-1 | +181560 |
| 12extended | 32 | Guo, Wei (1579) | Won 2-1 | +181578 |
| 13extended | 26 | Bautista, Giovanni Ala (1599) | Won 2-0 | +181596 |
| 14extended | 21 | Cheng, Gabriel (1605) | Won 2-1 | +191615 |
| top | average opponent: 1598record: 9-4 | new rating: 1615 | ||
| Grand Prix Singapore 2007 (extended) | starting rating: 1514 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 38 | Shi, Xiang (1537) | Won 2-0 | +191533 |
| 5extended | 11 | Tan, David (1589) | Won 2-0 | +191552 |
| 6extended | 7 | Ruel, Antoine (1821) | Lost 0-2 | -131539 |
| 7extended | 11 | Leong, Felix (1844) | Lost 0-2 | -131526 |
| 8extended | 26 | Tan, Gary Gui Ping (1722) | Lost 0-2 | -141512 |
| top | average opponent: 1703record: 2-3 | new rating: 1512 | ||
| Grand Prix Singapore 2005 (extended) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 39 | Leong, Felix (1536) | Lost 0-2 | -161429 |
| 3extended | 104 | Rangsan, Janrangsee (1499) | Won 2-1 | +191448 |
| 4extended | 87 | Phungprachit, Pulperm (1487) | Won 2-0 | +191467 |
| 5extended | 86 | Lau, Wilfred (1537) | Won 2-0 | +191486 |
| 6extended | 52 | Salvin, Jean Charles (1832) | Lost 0-2 | -121474 |
| 7extended | 64 | Lee, Jason Lay Boon (1600) | Won 2-0 | +211495 |
| 8extended | 42 | Chun, Bo Ruad (1588) | Won 2-1 | +191514 |
| top | average opponent: 1582record: 5-2 | new rating: 1514 | ||
| Grand Prix Singapore 2003 (LGN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 35 | Tay, Kah Meng Bernard (1500) | Lost 1-2 | -181482 |
| 2sealed | 61 | Hiu, Choon Pien (1419) | Won 2-0 | +171499 |
| 3sealed | 74 | Lee, Clemence (1499) | Lost 0-2 | -181481 |
| 4sealed | 103 | Hakeem, Luqman (1482) | Lost 1-2 | -181463 |
| 5sealed | 103 | Chong, Kelvin (1445) | Won 2-0 | +181481 |
| 6sealed | 86 | Lim, Leslie (1512) | Lost 1-2 | -181463 |
| 7sealed | 82 | Ang, Guang Rong (1481) | Lost 0-2 | -181445 |
| top | average opponent: 1477record: 2-5 | new rating: 1445 | ||