Ikai, Koichiro
Current rating: 1508
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1543 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 379 | Naoi, Shingo (1527) | Won 2-1 | +181561 |
| 2sealed | 375 | Abe, Masahide (1402) | Lost 1-2 | -211540 |
| 3sealed | 784 | Ng, Meng Cheong (1722) | Won 2-0 | +211561 |
| 4sealed | 629 | Maki, Hidekazu (1573) | Lost 1-2 | -181543 |
| 5sealed | 652 | Kashiwase, Kazuya (1651) | Lost 1-2 | -161527 |
| 6sealed | 770 | Kato, Atushi (1467) | Lost 0-2 | -191508 |
| top | average opponent: 1557record: 2-4 | new rating: 1508 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1528 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 567 | Lin, Juiche (1500) | Won 2-0 | +171545 |
| 2standard | 180 | Goodo, Toshiyuki (1480) | Lost 1-2 | -191526 |
| 3standard | 709 | Abe, Michio (1545) | Won 2-1 | +181544 |
| 4standard | 420 | Ishizu, Kyohei (1484) | Won 2-0 | +171561 |
| 5standard | 245 | Kato, Jun (1570) | Lost 1-2 | -181543 |
| 6standard | 616 | Miyamoto, Yutaro (1592) | Lost 0-2 | -171526 |
| 7standard | 940 | Hayashi, Yuya (1530) | Won 2-1 | +181544 |
| 8standard | 495 | Hagiya, Ginga (1523) | Won 2-0 | +181562 |
| 9standard | 490 | Takato, Toshiyuki (1573) | Won 2-0 | +181580 |
| 10standard | 402 | Akama, Toshiki (1554) | Lost 0-2 | -181562 |
| 11standard | 377 | Kuribayashi, Takayuki (1526) | Lost 1-2 | -191543 |
| top | average opponent: 1534record: 6-5 | new rating: 1543 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2 | Miyawaki, Takeshi (1654) | Won 2-0 | +211521 |
| 2sealed | 33 | Harano, Takahiro (1651) | Won 2-1 | +201541 |
| 3sealed | 312 | Ueda, Tadahiko (1494) | Won 2-1 | +171558 |
| 4sealed | 38 | Suda, Kazuho (1522) | Won 2-0 | +181576 |
| 5sealed | 95 | Miyata, Yuuya (1729) | Won 2-0 | +201596 |
| 6sealed | 64 | Miyake, Yoshio (1632) | Lost 1-2 | -171579 |
| 7sealed | 77 | Takahashi, Jun (1512) | Lost 1-2 | -191560 |
| 8sealed | 369 | Wada, Yuki (1776) | Lost 0-2 | -141546 |
| 9sealed | 421 | Mori, Mitsuhiro (1535) | Lost 1-2 | -181528 |
| top | average opponent: 1612record: 5-4 | new rating: 1528 | ||