Mukai, Isao
Current rating: 1490
Record: 6-7
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 220 | Yoshizawa, Hiromi (1397) | Lost 1-2 | -201483 |
| 2standard | 310 | Kato, Yusuke (1482) | Won 2-0 | +181501 |
| 3standard | 252 | Koseki, Takuya (1499) | Won 2-1 | +181519 |
| 4standard | 141 | Takahashi, Kazunari (1561) | Lost 0-2 | -181501 |
| 5standard | 278 | Morita, Masahiko (1873) | Lost 1-2 | -111490 |
| average opponent: 1562record: 2-3 | new rating: 1490 | |||
| Grand Prix Niigata 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 186 | Hatakeyama, Souta (1500) | Won 2-0 | +181518 |
| 2sealed | 155 | Murase, Hiroshi (1583) | Won 2-1 | +191537 |
| 3sealed | 100 | Aono, Yoshio (1515) | Won 2-1 | +181555 |
| 4sealed | 14 | Hagiwara, Noriyuki (1638) | Lost 0-2 | -171538 |
| 5sealed | 99 | Yamasaki, Kouichi (1547) | Won 2-0 | +181556 |
| 6sealed | 74 | Wang, Ming Chee (1578) | Lost 0-2 | -171539 |
| 7sealed | 111 | Itou, Motoaki (1558) | Lost 0-2 | -181521 |
| 8sealed | 106 | Watanabe, Hayato (1484) | Lost 0-2 | -181503 |
| average opponent: 1550record: 4-4 | new rating: 1503 | |||