Shimamura, Riku
Current rating: 1453
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1524 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 423 | Ohnishi, Jyunpei (1853) | Lost 0-2 | -121512 |
| 2sealed | 662 | Tomiyama, Shin (1360) | Lost 1-2 | -211491 |
| 3sealed | 999 | Nakayama, Ian (1501) | Lost 0-2 | -181473 |
| 4sealed | 1036 | Kobayashi, Hirotaka (1377) | Lost 0-2 | -201453 |
| top | average opponent: 1523record: 0-4 | new rating: 1453 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1572 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 180 | Hiwatashi, Yasurou (1664) | Lost 0-2 | -171555 |
| 2legacy | 600 | Yahagi, Shuhei (1453) | Lost 1-2 | -201535 |
| 3legacy | 1088 | Mizuno, Akimitsu (1244) | Won 2-0 | +131548 |
| 4legacy | 969 | Kubota, Hirofumi (1364) | Lost 1-2 | -211527 |
| 5legacy | 1021 | Yamamoto, Masashi5011 (1462) | Won 2-1 | +171544 |
| 6legacy | 990 | Murakami, Akinori (1433) | Lost 1-2 | -201524 |
| top | average opponent: 1437record: 2-4 | new rating: 1524 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 485 | Mori, Shotaro (1485) | Lost 1-2 | -181482 |
| 2sealed | 332 | Siew, Han Liang (1715) | Lost 0-2 | -141468 |
| 3sealed | 543 | Hayashi, Tatsuya (1445) | Won 2-1 | +171485 |
| 4sealed | 461 | Kasama, Junichi (1386) | Won 2-0 | +171502 |
| 5sealed | 296 | Ishikawa, Yosuke (1456) | Won 2-1 | +171519 |
| 6sealed | 203 | Tanaka, Fumiya (1512) | Won 2-0 | +181537 |
| 7sealed | 236 | Endo, Takatomo (1508) | Won 2-0 | +171554 |
| 8sealed | 67 | Kishimoto, Nobuto (1531) | Won 2-0 | +181572 |
| 9sealed | 46 | Sugaya, Hironobu (1796) | Won 2-1 | +221594 |
| 10draft | 25 | Oh, Joo Hyun (1614) | Lost 1-2 | -181576 |
| 11draft | 95 | Yamamoto, Kouhei2453 (1726) | Won 2-1 | +211597 |
| 12draft | 81 | Kato, Kazuki (1992) | Lost 0-2 | -111586 |
| 13draft | 63 | Yap, Eugene (1651) | Lost 1-2 | -171569 |
| 14draft | 5 | Kaga, Hiroyuki (1539) | Won 2-1 | +171586 |
| 15draft | 116 | Nagami, Youichi (1771) | Lost 1-2 | -141572 |
| top | average opponent: 1608record: 9-6 | new rating: 1572 | ||