Umbalin, Rendell
Current rating: 1519
| Grand Prix Manila 2017 (AKH standard) | starting rating: 1554 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 23 | Tan, Anthony (1500) | Won 2-0 | +171571 |
| 2standard | 30 | Manalo, Aristotle (1711) | Lost 1-2 | -151556 |
| 3standard | 264 | Baligaya, Raymond (1507) | Lost 1-2 | -191537 |
| 4standard | 279 | Alba, Alberto Jr. (1581) | Won 2-1 | +191556 |
| 5standard | 246 | Ordonez, Alejandro (1528) | Lost 0-2 | -191537 |
| 6standard | 275 | Samaniego, Lawrence (1551) | Lost 0-2 | -181519 |
| top | average opponent: 1563record: 2-4 | new rating: 1519 | ||
| Grand Prix Manila 2015 (KTK standard) | starting rating: 1577 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 57 | Delos Trinos, Jonathan (1500) | Won 2-0 | +171594 |
| 2standard | 271 | Amado, Cesar (1535) | Won 2-0 | +161610 |
| 3standard | 44 | Ramos, Aris (1539) | Won 2-1 | +171627 |
| 4standard | 63 | Sclauzero, Joseph (1819) | Lost 1-2 | -141613 |
| 5standard | 99 | Liew Ming Wai, Kevin (1518) | Lost 0-2 | -201593 |
| 6standard | 318 | Perez, Joe (1502) | Lost 0-2 | -201573 |
| 7standard | 325 | Maceda, Max (1518) | Lost 0-2 | -191554 |
| top | average opponent: 1562record: 3-4 | new rating: 1554 | ||
| Grand Prix Singapore 2013 (RTR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 190 | Toh Sian Peng, Justin (1500) | Lost 0-2 | -181482 |
| 2sealed | 343 | Jia He, Bay (1482) | Won 2-0 | +181500 |
| 3sealed | 180 | Dela Cruz, Mark Brian (1527) | Won 2-1 | +181518 |
| 4sealed | 167 | Sim, Michael (1520) | Draw 1-1 | +11519 |
| 5sealed | 194 | Dayaday, Michael O (1542) | Won 2-0 | +181537 |
| 6sealed | 120 | Liu, Zhuoren (1519) | Won 2-1 | +181555 |
| 7sealed | 74 | Law, Albertus Hui Chin (1809) | Lost 0-2 | -141541 |
| 8sealed | 130 | Abdul Wahab, Shahrul Nizam (1534) | Won 2-1 | +181559 |
| 9sealed | 85 | Panaligan, Randy (1553) | Won 2-0 | +181577 |
| top | average opponent: 1554record: 6-2-1 | new rating: 1577 | ||