Nonaka, Masafumi
Current rating: 1486
Record: 12-12-5
| Grand Prix Nagoya 2004 (5DN standard) | starting rating: 1507 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 28 | Kamei, Masataka (1501) | Lost 0-2 | -181489 |
| 2standard | 345 | Ogasawara, Toshikazu (1484) | Won 2-0 | +171506 |
| 3standard | 326 | Tanikawa, Itaru (1362) | Lost 0-2 | -201486 |
| top | average opponent: 1449record: 1-2 | new rating: 1486 | ||
| Grand Prix Shizuoka 2003 (MRD limited) | starting rating: 1509 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 133 | Kim, Young-jun (1500) | Draw 1-1 | -11508 |
| 2sealed | 180 | Sakai, Toshinori (1465) | Lost 0-2 | -181490 |
| 3sealed | 251 | Dooley, Benjamin N (1482) | Won 2-0 | +171507 |
| 4sealed | 189 | Kondo, Takahiro (1500) | Lost 0-2 | -181489 |
| 5sealed | 210 | Kasuga, Shohei (1451) | Won 2-1 | +181507 |
| top | average opponent: 1480record: 2-2-1 | new rating: 1507 | ||
| Grand Prix Kyoto 2003 (LGN limited) | starting rating: 1509 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 8 | Sakai, Yasuki (1500) | Lost 0-2 | -181491 |
| 2sealed | 259 | Hayashi, Junsuke (1483) | Won 2-0 | +181509 |
| top | average opponent: 1491record: 1-1 | new rating: 1509 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1514 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 16 | Yanagawa, Tomoyuki (1502) | Lost 0-2 | -181496 |
| 2extended | 113 | Tanikawa, Itaru (1434) | Draw 1-1 | -11495 |
| 3extended | 152 | Sumino, Hironori (1388) | Draw 1-1 | -21493 |
| 4extended | 178 | Suzuki, Keiji (1462) | Lost 0-1 | -191474 |
| 5extended | 177 | Yamada, Yasuo (1432) | Draw 1-1 | -11473 |
| 6extended | 156 | Deyama, Hirofumi (1510) | Won 2-0 | +191492 |
| 7extended | 126 | Masamura, Ayumu (1451) | Draw 1-1 | -11491 |
| 8extended | 100 | Omori, Ken'ichirou (1464) | Won 2-0 | +181509 |
| top | average opponent: 1455record: 2-2-4 | new rating: 1509 | ||
| Grand Prix Shizuoka 2001 (ODY limited) | starting rating: 1572 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 140 | Suzuki, Toshimune (1500) | Lost 0-1 | -191553 |
| 2sealed | 255 | Nagai, Daisuke (1482) | Lost 0-2 | -201533 |
| 3sealed | 299 | Narumina, Ryoma (1464) | Lost 0-2 | -191514 |
| top | average opponent: 1482record: 0-3 | new rating: 1514 | ||
| Grand Prix Kyoto 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 83 | Yamagishi, Hajime (1500) | Won 2-1 | +181518 |
| 2extended | 147 | Yamasaki, Takao (1500) | Won 2-1 | +181536 |
| 3extended | 77 | Yoshimura, Motoki (1536) | Won 2-1 | +181554 |
| 4extended | 46 | Takezawa, Tsutomu (1519) | Lost 1-2 | -191535 |
| 5extended | 121 | Takahata, Yoichi (1536) | Lost 0-2 | -181517 |
| 6extended | 183 | Miyake, Tetsuya (1518) | Won 2-0 | +181535 |
| 7extended | 82 | Toyokawa, Yoshihiro (1535) | Won 2-1 | +181553 |
| 8extended | 68 | Okabayashi, Masanao (1600) | Won 2-0 | +191572 |
| top | average opponent: 1530record: 6-2 | new rating: 1572 | ||