Natasastra, Jeffry
Current rating: 1427
Record: 4-8
| Grand Prix Singapore 2001 (Invasion block) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 49 | Tan, Raymond (1500) | Lost 1-2 | -181481 |
| 2block | 70 | Loh, Chuan Han (1482) | Lost 0-2 | -181463 |
| 3block | 108 | Lim, Jeffrey (1464) | Lost 1-2 | -181445 |
| 4block | 130 | Seah, Xiang Ming (1446) | Won 2-0 | +181463 |
| 5block | 114 | Yong, Chang Wei Stanley (1464) | Lost 0-2 | -181445 |
| 6block | 123 | Amda, Arifin Bin Ali (1447) | Lost 0-2 | -181427 |
| average opponent: 1467record: 1-5 | new rating: 1427 | |||
| Grand Prix Singapore 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 16 | Lim, Ban Lee (1464) | Lost 1-2 | -191481 |
| 2extended | 51 | Soh, Joe (1482) | Won 2-1 | +181499 |
| 3extended | 63 | Liao, Rubin (1500) | Won 2-0 | +181517 |
| 4extended | 59 | Lin, Milton Jian Xiong (1466) | Lost 0-2 | -191498 |
| 5extended | 59 | Chew, Eu Jin Edmund (1533) | Won 2-0 | +191517 |
| 6extended | 59 | Jirapongtrakul, Boonchai (1518) | Lost 0-2 | -181499 |
| average opponent: 1494record: 3-3 | new rating: 1499 | |||