Ookura, Yasuhiro
Current rating: 1574
Record: 10-6
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1542 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 412 | Arthur, Mimi (1653) | Won 2-0 | +211563 |
| 2sealed | 93 | Uzawa, Yuichi (1745) | Lost 1-2 | -151548 |
| 3sealed | 704 | Imai, Kenta (1566) | Won 2-0 | +181566 |
| 4sealed | 660 | Awane, Hiroyuki (1485) | Won 2-0 | +171583 |
| 5sealed | 267 | Iwamura, Ryouichi (1552) | Won 2-0 | +171600 |
| 6sealed | 162 | Yamazaki, Yuki (1545) | Won 2-1 | +171617 |
| 7sealed | 133 | Ohara, Wataru (1452) | Lost 0-2 | -211596 |
| 8sealed | 233 | Usami, Koji (1347) | Lost 0-2 | -221574 |
| average opponent: 1543record: 5-3 | new rating: 1574 | |||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 121 | Nishina, Akihiko (1500) | Won 2-1 | +181518 |
| 2sealed | 223 | Kondou, Masaki (1432) | Won 2-1 | +161534 |
| 3sealed | 392 | Nakanishi, Kota (1391) | Lost 0-2 | -201514 |
| 4sealed | 293 | Kobayashi, Tetsuro (1611) | Won 2-1 | +201534 |
| 5sealed | 347 | Hara, Katsuaki (1569) | Won 2-1 | +181552 |
| 6sealed | 199 | Arita, Kento (1778) | Lost 0-2 | -141538 |
| 7sealed | 431 | Komatsu, Isamu (1558) | Lost 0-2 | -171521 |
| 8sealed | 397 | Ebitani, Keisuke (1733) | Won 2-1 | +211542 |
| average opponent: 1572record: 5-3 | new rating: 1542 | |||