Amba, Howard
Current rating: 1535
Record: 9-7-3
| Grand Prix Manila 2008 (Lorwyn block) | starting rating: 1600 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 79 | Lim, Rey (1500) | Lost 0-2 | -201580 |
| 2block | 277 | Go, Hadrian C (1482) | Lost 0-2 | -201560 |
| 3block | 276 | Felipe, Alexander II (1464) | Won 2-0 | +161576 |
| 4block | 253 | Trinidad, Erwin (1448) | Draw 1-1 | -21574 |
| 5block | 238 | Bautista, Nino (1482) | Lost 0-2 | -201554 |
| 6block | 255 | Prangan, Eduardo Jr (1464) | Lost 0-2 | -191535 |
| average opponent: 1473record: 1-4-1 | new rating: 1535 | |||
| Grand Prix Manila 2006 (GPT limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 148 | Abug, Gabriel (1500) | Won 2-1 | +181518 |
| 2sealed | 2 | Beley, Ronnie Paul (1518) | Won 2-0 | +181536 |
| 3sealed | 34 | Ongkeco, Michael (1536) | Draw 0-0 | 01536 |
| 4sealed | 42 | Rabago, Rainier Ardine (1539) | Won 2-1 | +181554 |
| 5sealed | 22 | Sequio, John Rey (1552) | Won 2-1 | +181572 |
| 6sealed | 9 | Barretto, Anthony Glen (1572) | Draw 1-1 | 01572 |
| 7sealed | 22 | Chan, Fung Shun (1541) | Won 2-0 | +171589 |
| 8draft | 30 | Matousek, Pavel (1803) | Lost 0-2 | -141575 |
| 9draft | 12 | Dela Cruz, Ramon G (1573) | Lost 0-2 | -181557 |
| 10draft | 20 | Quiray, Ron Oliver (1528) | Lost 0-2 | -181539 |
| 11draft | 16 | Wong, Lucas (1574) | Won 2-0 | +181557 |
| 12draft | 13 | Soliveres, Roel (1538) | Won 2-0 | +181575 |
| 13draft | 7 | Oiso, Masashi (1949) | Won 2-1 | +251600 |
| average opponent: 1594record: 8-3-2 | new rating: 1600 | |||