Oka, Koichiro
Current rating: 1464
Record: 1-3
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 454 | Tajimi, Yuki (1500) | Lost 0-2 | -181482 |
| 2block | 399 | Kihara, Shinichi (1482) | Lost 1-2 | -181464 |
| 3block | 557 | Kuno, Yoshihiro (1464) | Lost 1-2 | -181446 |
| 4block | 608 | Fujiura, Masanori (1446) | Won 2-0 | +181464 |
| average opponent: 1473record: 1-3 | new rating: 1464 | |||