Ota, Koichi
Current rating: 1467
Record: 3-5-2
| Grand Prix Kyoto 2003 (LGN limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 224 | Endo, Tadashi (1480) | Draw 1-1 | 01482 |
| 2sealed | 179 | Miyazaki, Kazuyuki (1482) | Lost 0-2 | -181464 |
| 3sealed | 257 | Saito, Takafumi (1482) | Draw 1-1 | 01464 |
| 4sealed | 277 | Nishikawa, Takahito (1582) | Won 2-0 | +201484 |
| 5sealed | 213 | Mezaki, Kouichi (1501) | Lost 0-2 | -171467 |
| average opponent: 1505record: 1-2-2 | new rating: 1467 | |||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 137 | Horii, Tokutaro (1518) | Lost 1-2 | -181482 |
| 3block | 320 | Nakachi, Yusuke (1447) | Won 2-1 | +181500 |
| 4block | 246 | Izumi, Satoru (1518) | Won 2-1 | +181518 |
| 5block | 171 | Ikeda, Takashi (1535) | Lost 1-2 | -181500 |
| 6block | 253 | Koyama, Masashi (1484) | Lost 1-2 | -181482 |
| average opponent: 1500record: 2-3 | new rating: 1482 | |||