Tanaka, Koichiro
Current rating: 1417
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1027 | Iwanaga, Kohei (1450) | Lost 1-2 | -181415 |
| 2sealed | 1338 | Nakajima, Syuro (1468) | Won 2-0 | +191434 |
| 3sealed | 1281 | Shimamura, Hideki (1500) | Lost 0-2 | -171417 |
| top | average opponent: 1473record: 1-2 | new rating: 1417 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 651 | Tokita, Toshimi (1488) | Lost 0-2 | -171467 |
| 2standard | 791 | Takahashi, Kei (1578) | Lost 0-2 | -161451 |
| 3standard | 922 | Kubo, Yuta1677 (1464) | Lost 0-2 | -181433 |
| top | average opponent: 1510record: 0-3 | new rating: 1433 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 292 | Higashiyama, Yoshio (1500) | Won 2-1 | +181518 |
| 2sealed | 128 | Kanehira, Haruki (1433) | Lost 1-2 | -201498 |
| 3sealed | 243 | Tsuno, Takahiro (1472) | Won 2-0 | +181516 |
| 4sealed | 275 | Hagiwara, Noriyuki (1767) | Lost 0-2 | -141502 |
| 5sealed | 344 | Obata, Shiou (1504) | Lost 0-2 | -181484 |
| top | average opponent: 1535record: 2-3 | new rating: 1484 | ||