Ong, Meng Koon
Current rating: 1351
Record: 11-21-1
| Grand Prix Bangkok 2019 (ELD limited) | starting rating: 1355 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 8 | Pechsri, Adulwech (1565) | Draw 1-1 | +41359 |
| 2sealed | 183 | Duenas, John Darwin (1493) | Lost 0-2 | -161343 |
| 3sealed | 332 | Vorawatthanabuncha, Nithiwat (1486) | Won 2-1 | +211364 |
| 4sealed | 268 | Margelisch, Michael (1502) | Won 2-1 | +201384 |
| 5sealed | 179 | Nohara, Ryuuji (1487) | Lost 1-2 | -161368 |
| 6sealed | 241 | Choo, Ida Maria (1397) | Lost 1-2 | -171351 |
| top | average opponent: 1488record: 2-3-1 | new rating: 1351 | ||
| Grand Prix Singapore 2017 (XLN limited) | starting rating: 1432 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 26 | Ng, Chin Wuen (1481) | Won 2-0 | +191451 |
| 2sealed | 1 | Cruz, Marlon Kane (1521) | Lost 0-2 | -161435 |
| 3sealed | 214 | De Beule, Servaes (1595) | Won 2-1 | +211456 |
| 4sealed | 84 | Prabhata, Kynan (1551) | Lost 1-2 | -171439 |
| 5sealed | 507 | Koh, Kai Che (1656) | Lost 1-2 | -141425 |
| 6sealed | 221 | Lai, Jeremy (1482) | Lost 0-2 | -171408 |
| 7sealed | 218 | Tan, Kevin (1337) | Lost 1-2 | -191389 |
| 8sealed | 205 | Lam, Theron (1458) | Lost 1-2 | -171372 |
| 9sealed | 191 | Lei, Ngaiteng (1419) | Lost 0-2 | -171355 |
| top | average opponent: 1500record: 2-7 | new rating: 1355 | ||
| Grand Prix Manila 2017 (AKH standard) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 78 | Tan, Erikson (1428) | Won 2-0 | +171463 |
| 2standard | 1 | Carrillo, JL Nichole (1499) | Lost 1-2 | -171446 |
| 3standard | 202 | Lanuza, Gabriel (1501) | Lost 0-2 | -171429 |
| 4standard | 315 | Tan, Anthony (1482) | Lost 1-2 | -171412 |
| 5standard | 322 | Flores, Paul Dexter (1463) | Won 2-0 | +191431 |
| 6standard | 247 | Shih, Michael (1356) | Lost 1-2 | -201411 |
| 7standard | 295 | Castro, Fillip (1479) | Won 2-0 | +201431 |
| 8standard | 252 | Montelibano, Andrew (1490) | Won 2-1 | +191450 |
| 9standard | 223 | Garces, Craig Shaun (1488) | Lost 0-2 | -181432 |
| top | average opponent: 1465record: 4-5 | new rating: 1432 | ||
| Grand Prix Kuala Lumpur 2016 (KLD standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 57 | Lee, Sean (1496) | Lost 0-2 | -181482 |
| 2standard | 168 | Nilsen, Age Alexander (1378) | Won 2-0 | +161498 |
| 3standard | 243 | Jun-Tseng, Goh (1499) | Lost 0-0 | -181480 |
| 4standard | 285 | Ching, Charles (1481) | Won 2-0 | +181498 |
| 5standard | 628 | Wu, David (1598) | Won 2-1 | +201518 |
| 6standard | 123 | Wong, Tong Wee (1493) | Lost 0-2 | -191499 |
| 7standard | 213 | Johan, Jimmy (1500) | Lost 0-2 | -181481 |
| 8standard | 237 | Santorio, John Paolo (1488) | Lost 0-2 | -171464 |
| 9standard | 224 | Poh Sen, Ong (1464) | Lost 0-2 | -181446 |
| top | average opponent: 1488record: 3-6 | new rating: 1446 | ||