Koyama, Koya
Current rating: 1449
Record: 2-5
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 621 | Kobachi, Rikiya (1472) | Lost 0-2 | -191481 |
| 2standard | 777 | Yamamori, Yuki (1492) | Won 2-0 | +191500 |
| 3standard | 754 | Akita, Naoto (1457) | Lost 1-2 | -191481 |
| 4standard | 1018 | Tanaka, Kento (1639) | Won 2-0 | +211502 |
| 5standard | 821 | Tanaka, Fumiya 1717 (1465) | Lost 0-2 | -191483 |
| 6standard | 802 | Iwama, Gaku (1451) | Lost 1-2 | -181465 |
| 7standard | 763 | Touma, Takahiro (1602) | Lost 0-2 | -161449 |
| average opponent: 1511record: 2-5 | new rating: 1449 | |||