Matsumoto, Okimasa
Current rating: 1487
Record: 6-7
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 59 | Nishiwaki, Masato (1500) | Lost 1-2 | -171447 |
| 2block | 371 | Fujisawa, Yozo (1482) | Won 2-1 | +181465 |
| 3block | 267 | Itano, Masao (1500) | Lost 0-2 | -171448 |
| 4block | 563 | Komura, Norikazu (1481) | Won 2-0 | +191467 |
| 5block | 410 | Taru, Genki (1465) | Lost 0-2 | -181449 |
| 6block | 442 | Miyata, Tatsuya (1482) | Lost 0-2 | -181431 |
| 7block | 364 | Kaneko, Satoshi (1465) | Won 2-0 | +191450 |
| 8block | 305 | Shimura, Yasuhiko (1470) | Won 2-0 | +181468 |
| 9block | 192 | Ohnishi, Koji (1500) | Won 2-0 | +191487 |
| average opponent: 1483record: 5-4 | new rating: 1487 | |||
| Grand Prix Kyoto 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 209 | Azuma, Kiyohiko (1500) | Won 2-0 | +181518 |
| 2extended | 164 | Saka, Kenichiro (1518) | Lost 0-2 | -181500 |
| 3extended | 263 | Ohno, Tomonari (1500) | Lost 0-2 | -181482 |
| 4extended | 302 | Uda, Keisuke (1482) | Lost 0-2 | -181464 |
| average opponent: 1500record: 1-3 | new rating: 1464 | |||