Iwabuchi, Masaki
Current rating: 1496
Record: 7-8
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1537 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 204 | Tonami, Kouhei (1500) | Lost 1-2 | -191518 |
| 2legacy | 434 | Kobayashi, Yuki9104 (1409) | Won 2-0 | +161534 |
| 3legacy | 439 | Mitsuya, Keiji (1521) | Lost 1-2 | -181516 |
| 4legacy | 634 | Ooi, Yuichi (1464) | Won 2-0 | +171533 |
| 5legacy | 515 | Sogo, Eiji (1510) | Lost 1-2 | -181515 |
| 6legacy | 497 | Sasahara, Yuta (1461) | Lost 1-2 | -191496 |
| average opponent: 1477record: 2-4 | new rating: 1496 | |||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 934 | Nagashima, Makoto (1842) | Won 2-1 | +241524 |
| 2standard | 390 | Nisigahana, Tatunori (1347) | Won 2-0 | +151539 |
| 3standard | 712 | Sato, Tatsuo (1534) | Won 2-0 | +181557 |
| 4standard | 28 | Fujimoto, Takehiro (1822) | Won 2-0 | +221579 |
| 5standard | 91 | Ozawa, Takeshi (1872) | Won 2-1 | +241603 |
| 6standard | 79 | Ishii, Taisuke (1784) | Lost 0-2 | -151588 |
| 7standard | 115 | Fukuoka, Sou (1637) | Lost 0-2 | -171571 |
| 8standard | 419 | Ohnishi, Jyunpei (1676) | Lost 0-2 | -161555 |
| 9standard | 400 | Sasaki, Tsutomu (1565) | Lost 1-2 | -181537 |
| average opponent: 1676record: 5-4 | new rating: 1537 | |||