Tachikawa, Koudai
Current rating: 1501
Record: 8-8
| Grand Prix Hong Kong 2013 (THS limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 193 | So, Paul Richard (1437) | Won 2-1 | +171498 |
| 2sealed | 141 | Lau, Oskar (1518) | Lost 0-2 | -181480 |
| 3sealed | 230 | Ng, Tung (1500) | Lost 0-2 | -171463 |
| 4sealed | 315 | Lam, Wai Hung (1465) | Won 2-0 | +181481 |
| 5sealed | 230 | Lau, Ringo (1449) | Won 2-0 | +171498 |
| 6sealed | 264 | Liu, Bojian (1502) | Lost 0-2 | -181480 |
| 7sealed | 275 | Zeng, Yi (1499) | Won 2-1 | +191499 |
| 8sealed | 158 | Sutthisakorn, Channarong (1624) | Won 2-0 | +201519 |
| 9sealed | 168 | Wright, David (1522) | Lost 1-2 | -181501 |
| average opponent: 1502record: 5-4 | new rating: 1501 | |||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 131 | Akimoto, Yoshiki (1500) | Won 2-0 | +181518 |
| 2modern | 222 | Matsuyama, Takuya (1500) | Won 2-1 | +181536 |
| 3modern | 200 | Murakami, Yuuichi (1537) | Won 2-1 | +181554 |
| 4modern | 153 | Tsuchiya, Hideaki (1586) | Lost 1-2 | -181536 |
| 5modern | 245 | Yasuda, Seita (1470) | Lost 0-2 | -191517 |
| 6modern | 299 | Shiozaki, Toshinori (1499) | Lost 1-2 | -181499 |
| 7modern | 411 | Minobe, Shinya (1503) | Lost 0-2 | -181481 |
| average opponent: 1513record: 3-4 | new rating: 1481 | |||