Koike, Yuya
Current rating: 1482
Record: 15-17
| Grand Prix Yokohama 2019 (modern) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 3 | Tomiyama, Katsuhiko (1520) | Lost 1-2 | -171433 |
| 2modern | 793 | Nishihata, Sho (1482) | Won 2-0 | +191452 |
| 3modern | 912 | Hui, Yew Woh (1639) | Won 2-1 | +211473 |
| 4modern | 369 | Satou, Ryota8302 (1531) | Won 2-1 | +201493 |
| 5modern | 366 | Kawai, Hiroki1988 (1565) | Won 2-0 | +191512 |
| 6modern | 188 | Sato, Keisuke (1647) | Lost 0-2 | -161496 |
| 7modern | 226 | Miyabe, Kouichi (1683) | Lost 1-2 | -141482 |
| top | average opponent: 1581record: 4-3 | new rating: 1482 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1492 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 229 | Yashiro, Takeshi (1500) | Lost 0-2 | -181474 |
| 2sealed | 577 | Morii, Masahiko (1463) | Won 2-0 | +181492 |
| 3sealed | 669 | Nakayama, Makoto (1360) | Lost 1-2 | -201472 |
| 4sealed | 883 | Kounosu, Hiroaki (1169) | Won 2-0 | +121484 |
| 5sealed | 729 | Ojima, Toshiaki (1503) | Lost 0-2 | -171467 |
| 6sealed | 840 | Nakamura, Yuta9375 (1545) | Lost 0-2 | -171450 |
| top | average opponent: 1423record: 2-4 | new rating: 1450 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 709 | Yuichi, Yamamoto (1467) | Won 2-0 | +181483 |
| 2standard | 744 | Miyamoto, Syouta (1518) | Won 2-1 | +181501 |
| 3standard | 214 | Yasuda, Kimihiko (1500) | Lost 0-2 | -181483 |
| 4standard | 746 | Suzuki, Takahisa (1345) | Won 2-1 | +161499 |
| 5standard | 666 | Ito, Jin (1491) | Lost 1-2 | -181481 |
| 6standard | 566 | Yatori, Naoyuki (1586) | Won 2-1 | +201501 |
| 7standard | 379 | Kobayashi, Hisato (1533) | Won 2-0 | +181519 |
| 8standard | 405 | Naitou, Hisashi (1596) | Lost 0-2 | -161503 |
| 9standard | 427 | Ishiyama, Satoshi (1534) | Won 2-1 | +181521 |
| 10standard | 445 | Kamo, Riki (1730) | Won 2-1 | +221543 |
| 11standard | 168 | Sano, Yoshimasa (1587) | Lost 0-2 | -171526 |
| 12standard | 293 | Matsui, Yasuo (1607) | Lost 1-2 | -171509 |
| 13standard | 322 | Hirano, Aimi (1549) | Lost 1-2 | -171492 |
| top | average opponent: 1542record: 7-6 | new rating: 1492 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 509 | Atsumi, Yoshihiro (1489) | Lost 1-2 | -181482 |
| 2standard | 661 | Matsumoto, Yu (1481) | Lost 1-2 | -181464 |
| 3standard | 1170 | Tsukamoto, Tatsushi (1539) | Won 2-0 | +191483 |
| 4standard | 893 | Kawata, Yoshiaki (1474) | Won 2-0 | +181501 |
| 5standard | 920 | Anderson, Kyle (1478) | Lost 0-2 | -181483 |
| 6standard | 771 | Kurosawa, Yuuki7831 (1496) | Lost 0-2 | -181465 |
| top | average opponent: 1493record: 2-4 | new rating: 1465 | ||