Koike, Junya
Current rating: 1458
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1431 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 274 | Choumura, Shoui (1500) | Won 2-1 | +191450 |
| 2standard | 222 | Sakadani, Naoki (1518) | Won 2-1 | +191469 |
| 4standard | 240 | Kobayashi, Hiroya (1561) | Lost 1-2 | -161453 |
| 5standard | 327 | Otani, Kodai (1523) | Lost 1-2 | -171436 |
| 6standard | 545 | Okajima, Masahiro (1621) | Won 2-1 | +211457 |
| 7standard | 371 | Niitani, Nobuhide (1389) | Won 2-1 | +171474 |
| 8standard | 287 | Ino, Keita (1584) | Lost 1-2 | -161458 |
| top | average opponent: 1528record: 4-3 | new rating: 1458 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 235 | Tsurifune, Takashi (1626) | Lost 1-2 | -151465 |
| 2sealed | 776 | Tanaka, Yuki (1419) | Lost 0-2 | -191446 |
| 3sealed | 1047 | Seki, Hirotaka (1604) | Lost 0-2 | -151431 |
| top | average opponent: 1550record: 0-3 | new rating: 1431 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 177 | Deng, Yunan (1520) | Won 2-1 | +181518 |
| 2standard | 502 | Takata, Takumi (1426) | Lost 0-2 | -191499 |
| 3standard | 861 | Sano, Kaname (1497) | Draw 1-1 | 01499 |
| 4standard | 922 | Iwama, Gaku (1488) | Lost 1-2 | -191480 |
| 5standard | 1076 | Hirooka, Hideki (1423) | Won 2-0 | +171497 |
| 6standard | 857 | Itami, Toshimitsu (1528) | Lost 1-2 | -171480 |
| top | average opponent: 1480record: 2-3-1 | new rating: 1480 | ||