Arai, Riki
Current rating: 1403
Record: 4-10
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1392 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 47 | Kanno, Daisuke (1499) | Lost 1-2 | -161376 |
| 2sealed | 195 | Yamamoto, Yusuke (1415) | Won 2-0 | +181394 |
| 3sealed | 209 | Ozaki, Youichirou (1439) | Lost 0-2 | -171377 |
| 4sealed | 275 | Mishima, Yuuichirou (1503) | Lost 0-2 | -161361 |
| 5sealed | 240 | Kosuga, Shuhei (1469) | Lost 0-2 | -161345 |
| 6sealed | 199 | Itou, Takanori (1409) | Won 2-1 | +191364 |
| 7sealed | 154 | Ogiyama, Shuuji (1469) | Won 2-1 | +201384 |
| 8sealed | 115 | Mochizuki, Takahito (1430) | Won 2-1 | +191403 |
| average opponent: 1454record: 4-4 | new rating: 1403 | |||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 46 | Furuya, Shinichi (1480) | Lost 0-2 | -181482 |
| 2block | 345 | Imaizumi, Hirofumi (1477) | Lost 0-2 | -181464 |
| 3block | 330 | Saito, Kakeru (1464) | Lost 0-2 | -181446 |
| 4block | 386 | Hara, Hirohide (1446) | Lost 0-2 | -181428 |
| 5block | 368 | Iida, Shingo (1429) | Lost 0-2 | -181410 |
| 6block | 340 | Tate, Yosinobu (1409) | Lost 0-2 | -181392 |
| average opponent: 1451record: 0-6 | new rating: 1392 | |||