Tanaka, Kei
Current rating: 1530
Record: 4-3-1
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1549 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 157 | Fujii, Hajime (1487) | Lost 0-2 | -191530 |
| record: 0-1 | new rating: 1530 | |||
| Grand Prix Nagoya 2004 (5DN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 185 | Matsubara, Yoshiro (1463) | Won 2-0 | +171517 |
| 2standard | 174 | Okuda, Masateru (1573) | Won 2-1 | +191536 |
| 3standard | 53 | Sugimoto, Takashi (1666) | Won 2-1 | +211557 |
| 4standard | 113 | Sugiki, Takafumi (1648) | Lost 0-2 | -171540 |
| 5standard | 98 | Douyama, Tsuyoshi (1775) | Won 2-1 | +231563 |
| 6standard | 72 | Mitsuya, Kazuhiko (1843) | Draw 1-1 | +51568 |
| 7standard | 85 | Michiba, Ryouta (1522) | Lost 0-2 | -191549 |
| average opponent: 1641record: 4-2-1 | new rating: 1549 | |||