Ishii, Arata
Current rating: 1539
Record: 10-8
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 206 | Sasaki, Shinji (1500) | Won 2-1 | +181536 |
| 2standard | 162 | Nakayama, Yuuki (1452) | Lost 1-2 | -191517 |
| 3standard | 202 | Sasaki, Masaya (Aichi) (1499) | Won 2-1 | +171534 |
| 4standard | 217 | Igarashi, Masatoshi (1519) | Won 2-0 | +181552 |
| 5standard | 185 | Kuo, Tzu-Ching (2013) | Lost 0-2 | -101542 |
| 6standard | 143 | Fujimoto, Tomoya (1515) | Won 2-1 | +171559 |
| 7standard | 130 | Morikawa, Youhei (1496) | Lost 1-2 | -191540 |
| 8standard | 178 | SNYDER, DANIEL C (1524) | Lost 1-2 | -181522 |
| 9standard | 170 | Tajima, Kouichi (1458) | Won 2-0 | +171539 |
| average opponent: 1553record: 5-4 | new rating: 1539 | |||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 193 | Tateno, Tomoaki (1415) | Won 2-0 | +161516 |
| 2extended | 271 | Yokotsuka, Yu (1518) | Won 2-0 | +181534 |
| 3extended | 66 | Maruyama, Kentarou (1434) | Lost 1-2 | -191515 |
| 4extended | 160 | Murata, Atsushi (1547) | Won 2-1 | +181533 |
| 5extended | 155 | Motoi, Kenichi (1540) | Won 2-0 | +181551 |
| 6extended | 117 | Tagomori, Shou (1560) | Lost 0-2 | -171534 |
| 7extended | 157 | Kozakai, Yukio (1467) | Won 2-0 | +161550 |
| 8extended | 132 | Yukuhiro, Ken (1848) | Lost 1-2 | -121538 |
| 9extended | 120 | Yamazaki, Daisuke (1474) | Lost 0-2 | -201518 |
| average opponent: 1534record: 5-4 | new rating: 1518 | |||