Arai, Kohei
Current rating: 1506
Record: 6-6
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 346 | Yamamoto, Takahiro (1744) | Won 2-0 | +231506 |
| 2sealed | 299 | Rachi, Seiya (1518) | Won 2-1 | +181524 |
| 3sealed | 332 | Onishi, Kouhei (1387) | Lost 0-2 | -211503 |
| 4sealed | 455 | Nishiura, Ryosuke (1696) | Lost 0-2 | -141489 |
| 5sealed | 822 | Fukuchi, Yutaka (1471) | Won 2-0 | +171506 |
| average opponent: 1563record: 3-2 | new rating: 1506 | |||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 407 | Moki, Hiromu (1500) | Lost 0-2 | -181482 |
| 2standard | 804 | Matsumoto, Keiichiro (1481) | Won 2-1 | +181500 |
| 3standard | 927 | Sano, Masahiko (1579) | Won 2-0 | +191519 |
| 4standard | 576 | Katayanagi, Shigehisa (1507) | Won 2-0 | +181537 |
| 5standard | 552 | Morota, Jun (1534) | Lost 0-2 | -181519 |
| 6standard | 560 | Ohkawa, Yusuke (1503) | Lost 1-2 | -181501 |
| 7standard | 961 | Akamine, Yuta (1501) | Lost 1-2 | -181483 |
| average opponent: 1515record: 3-4 | new rating: 1483 | |||