Hamasaki, Masayuki
Current rating: 1559
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 480 | Kusajima, Ikuo (1488) | Won 2-1 | +171538 |
| 2sealed | 252 | Matsushita, Masayoshi (1534) | Won 2-0 | +181556 |
| 3sealed | 82 | Arahori, Kazuaki (1432) | Won 2-0 | +161572 |
| 4sealed | 17 | Kobayashi, Ryohei (1734) | Won 2-1 | +211593 |
| 5sealed | 2 | Naide, Kazutaka (1688) | Lost 1-2 | -171576 |
| 6sealed | 209 | Okamura, Takumi (1541) | Lost 0-2 | -181558 |
| 7sealed | 475 | Takeda, Hiroki (1565) | Won 2-1 | +181576 |
| 8sealed | 208 | Ichikawa, Shoichi (1627) | Lost 1-2 | -171559 |
| top | average opponent: 1576record: 5-3 | new rating: 1559 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1512 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 726 | Takahashi, Koji (1386) | Won 2-0 | +161528 |
| 2sealed | 160 | Sugiyama, Yuya (1889) | Lost 0-2 | -121516 |
| 3sealed | 1003 | Nakamura, Kouki 9697 (1502) | Won 2-1 | +181534 |
| 4sealed | 753 | Yokoide, Yuuta (1468) | Won 2-1 | +171551 |
| 5sealed | 376 | Matsumoto, Yuki2978 (1945) | Lost 1-2 | -111540 |
| 6sealed | 411 | Miyagawa, Takahiro (1473) | Lost 1-2 | -191521 |
| top | average opponent: 1611record: 3-3 | new rating: 1521 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 261 | Hagishima, Daijiro (1396) | Won 2-0 | +161516 |
| 2sealed | 222 | Takasugi, Tomoki (1526) | Won 2-1 | +181534 |
| 3sealed | 468 | Lipinski, Michal (1767) | Won 2-1 | +221556 |
| 4sealed | 192 | Lee, Kuangyao (1554) | Lost 0-2 | -181538 |
| 5sealed | 317 | Turtenwald, Owen (2114) | Lost 0-2 | -81530 |
| 6sealed | 418 | Koshiba, Norihiko (1419) | Won 2-1 | +161546 |
| 7sealed | 382 | Yamawaki, Satoru (1547) | Lost 1-2 | -181528 |
| 8sealed | 527 | Matsumoto, Masataka (1668) | Lost 1-2 | -161512 |
| top | average opponent: 1624record: 4-4 | new rating: 1512 | ||