Ishihara, Kosuke
Current rating: 1465
Record: 2-4
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 74 | Ishii, Keisuke (1574) | Lost 1-2 | -171483 |
| 2extended | 146 | Tsukiyama, Tomokazu (1482) | Lost 1-2 | -181465 |
| 3extended | 174 | Katou, Dai (1427) | Won 2-1 | +181483 |
| 4extended | 138 | Nakaya, Makoto (1481) | Won 2-1 | +181501 |
| 5extended | 128 | Shiraishi, Naotsugu (1500) | Lost 0-2 | -181483 |
| 6extended | 130 | Vanderburg, Aaron B (1485) | Lost 1-2 | -181465 |
| average opponent: 1491record: 2-4 | new rating: 1465 | |||