Okubo, Yoshihiko
Current rating: 1452
Record: 17-19
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1509 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 180 | Li, Zongze (1500) | Lost 1-2 | -181491 |
| 2standard | 440 | Hishida, Tomoya (1244) | Won 2-1 | +131504 |
| 3standard | 554 | Takashima, Ken (1536) | Lost 1-2 | -171487 |
| 4standard | 675 | Hashizume, Nobuyuki (1615) | Lost 1-2 | -161471 |
| 5standard | 779 | Muto, Takano (1465) | Won 2-1 | +181489 |
| 6standard | 668 | Hirai, Daiki (1451) | Lost 0-2 | -181471 |
| 7standard | 569 | Miki, Kenta (1446) | Lost 0-2 | -191452 |
| top | average opponent: 1465record: 2-5 | new rating: 1452 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1547 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 123 | Ishizaki, Yoshiki (1658) | Lost 1-2 | -161531 |
| 2sealed | 560 | Kitakata, Atsushi (1483) | Won 2-0 | +171548 |
| 3sealed | 925 | Tanaka, Makoto1460 (1344) | Lost 1-2 | -221526 |
| 4sealed | 932 | Nishimoto, Takuya (1565) | Lost 0-2 | -171509 |
| 5sealed | 901 | Sugisawa, Tsuyoshi (1550) | Won 2-0 | +191528 |
| 6sealed | 737 | Yamamoto, Shohei 2804 (1488) | Lost 0-2 | -191509 |
| top | average opponent: 1515record: 2-4 | new rating: 1509 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1559 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 210 | Yap, Jeffrey (1397) | Won 2-0 | +151574 |
| 2modern | 112 | Fujimoto, Kazuki (1394) | Won 2-1 | +151589 |
| 3modern | 403 | Ooba, Hideto (1411) | Lost 1-2 | -211568 |
| 4modern | 627 | Kobayashi, Kazutaka 2396 (1484) | Won 2-0 | +161584 |
| 5modern | 414 | Sugiyama, Nobukatsu (1529) | Lost 1-2 | -191565 |
| 6modern | 618 | Liu, Xuan (1715) | Lost 1-2 | -151550 |
| 7modern | 671 | Omori, Wataru (1468) | Lost 0-2 | -191531 |
| 8modern | 626 | Hanada, Keisuke (1432) | Won 2-1 | +161547 |
| top | average opponent: 1479record: 4-4 | new rating: 1547 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 83 | Kurosu, Kazuki (1439) | Won 2-0 | +171517 |
| 2standard | 240 | Matsuda, Hideyuki (1464) | Lost 0-2 | -191498 |
| 3standard | 1009 | Li, Chi (1546) | Won 2-0 | +191517 |
| 4standard | 844 | Matsumoto, Keiichiro (1416) | Won 2-0 | +161533 |
| 5standard | 311 | Yamamoto, Ryoichi (1527) | Lost 1-2 | -181515 |
| 6standard | 586 | Tazawa, Kazuho (1569) | Won 2-0 | +191534 |
| 7standard | 353 | Sato, Tatsuo (1487) | Lost 1-2 | -191515 |
| 8standard | 500 | Narita, Nobushige (1519) | Won 2-1 | +181533 |
| 9standard | 486 | Ibushi, Shotaro (1474) | Won 2-0 | +171550 |
| 10standard | 237 | Hikokubo, Shota (1556) | Won 2-0 | +181568 |
| 11standard | 132 | Kanegawa, Toshiya (1913) | Lost 1-2 | -121556 |
| 12standard | 217 | Gotou, Hiroyuki (1683) | Won 2-1 | +201576 |
| 13standard | 146 | Furuichi, Takenori (1578) | Lost 1-2 | -181558 |
| 14standard | 256 | Shibata, Hirotaka (1617) | Lost 0-2 | -161542 |
| 15standard | 246 | Michibata, Tatsuya (1529) | Won 2-1 | +171559 |
| top | average opponent: 1555record: 9-6 | new rating: 1559 | ||