Koyama, Yutaro
Current rating: 1463
Record: 3-5
| Grand Prix Yokohama 2019 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 2 | Tanaka, Tarou (1508) | Lost 1-2 | -181482 |
| 2modern | 882 | Angelini, Roberto (1397) | Won 2-1 | +171499 |
| 3modern | 865 | Saitou, Takuya (1403) | Lost 1-2 | -201479 |
| 4modern | 851 | Nakashima, Ryo (1536) | Won 2-1 | +191498 |
| 5modern | 899 | Hara, Ryota (1508) | Won 2-0 | +181516 |
| 6modern | 491 | Kimura, Takuya (1441) | Lost 0-2 | -191497 |
| 7modern | 685 | Kobayashi, Hironori (1441) | Lost 0-2 | -191478 |
| 8modern | 632 | Tsukagoshi, Tadaki (1651) | Lost 1-2 | -151463 |
| average opponent: 1486record: 3-5 | new rating: 1463 | |||