Koshi, Takuma
Current rating: 1474
Record: 5-7
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 223 | Saito, Shinnosuke (1548) | Lost 1-2 | -161450 |
| 2standard | 629 | Hama, Shigehiro (1482) | Won 2-1 | +191469 |
| 3standard | 834 | Shimokawa, Kenzo (1500) | Lost 1-2 | -181451 |
| 4standard | 828 | Kawabata, Kenta (1477) | Won 2-0 | +191470 |
| 5standard | 568 | Imai, Kenta (1614) | Won 2-0 | +201490 |
| 6standard | 502 | Suzuki, Shoya (1588) | Lost 1-2 | -161474 |
| average opponent: 1535record: 3-3 | new rating: 1474 | |||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 820 | Gotou, Taito (1500) | Lost 1-2 | -181482 |
| 2standard | 1247 | Akiba, Takafumi (1444) | Won 2-0 | +171499 |
| 3standard | 823 | Nakamoto, Kosuke (1701) | Lost 0-2 | -141485 |
| 4standard | 1143 | Kimura, Akinari (1480) | Won 2-1 | +181503 |
| 5standard | 1080 | Koshi, Hiroto (1479) | Lost 1-2 | -191484 |
| 6standard | 1120 | Tsukamoto, Naoyuki (1488) | Lost 1-2 | -181466 |
| average opponent: 1515record: 2-4 | new rating: 1466 | |||