Tazawa, Masaki
Current rating: 1513
Record: 30-34-1
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 348 | Katou, Shinpei (1552) | Lost 1-2 | -161447 |
| 2pioneer | 500 | Hato, Ryo (1473) | Won 2-1 | +181465 |
| 3pioneer | 432 | Takemoto, Hikaru (1629) | Won 2-1 | +211486 |
| 4pioneer | 428 | Matumura, Hirohumi (1676) | Won 2-1 | +221508 |
| 5pioneer | 253 | Feng, Yang (1625) | Won 2-1 | +201528 |
| 6pioneer | 181 | Matsubara, Takeyuki (1729) | Won 2-0 | +221550 |
| 7pioneer | 123 | Uzuki, Yushi (1512) | Lost 1-2 | -191531 |
| 8pioneer | 98 | Suzuki, Nobuya5760 (1588) | Won 2-0 | +191550 |
| 9pioneer | 122 | Kinoshita, Akira (1465) | Lost 1-2 | -201530 |
| 10pioneer | 153 | Yoshida, Yuuki (1556) | Lost 1-2 | -171513 |
| top | average opponent: 1581record: 6-4 | new rating: 1513 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1479 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 84 | Suzuki, Ryo (1513) | Lost 1-2 | -171462 |
| 2modern | 381 | Morizane, Hitoshi (1428) | Lost 0-2 | -191443 |
| 3modern | 506 | Wakisaka, Kazuya (1463) | Won 2-1 | +191462 |
| 4modern | 419 | Shin, Takahiro (1488) | Lost 0-2 | -181444 |
| 5modern | 487 | Saitou, Daisuke (1281) | Won 2-1 | +151459 |
| 6modern | 447 | Koura, Yuta (1482) | Won 2-1 | +191478 |
| 7modern | 311 | Kobayashi, Kazuto (1650) | Won 2-0 | +211499 |
| 8modern | 265 | Yasuda, Kazuki (1523) | Lost 1-2 | -181481 |
| 9modern | 244 | Shigemura, Yuji (1486) | Lost 0-2 | -181463 |
| top | average opponent: 1479record: 4-5 | new rating: 1463 | ||
| Grand Prix Bangkok 2013 (DGM limited) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 68 | Carlos, Aaron (1616) | Won 2-1 | +211506 |
| 5sealed | 28 | Takahashi, Yuta (1724) | Won 2-1 | +221528 |
| 6sealed | 23 | Jirawatanakul, Akarawa (1599) | Lost 1-2 | -171511 |
| 7sealed | 52 | Skoblov, Nikita (1627) | Lost 0-2 | -161495 |
| 8sealed | 47 | Tanaka, Akira (1632) | Lost 1-2 | -161479 |
| top | average opponent: 1640record: 2-3 | new rating: 1479 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1437 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 62 | Takahashi, Akira (1518) | Won 2-1 | +191456 |
| 3sealed | 27 | Harada, Yuuichirou (1535) | Lost 0-2 | -161440 |
| 4sealed | 230 | Ichimura, Kazunari (1513) | Won 2-1 | +191459 |
| 5sealed | 114 | Saeki, Katsuhisa (1525) | Lost 0-2 | -171442 |
| 6sealed | 273 | Igarashi, Yasutaka (1519) | Won 2-1 | +201462 |
| 7sealed | 191 | Torigoe, Seitaro (1657) | Lost 1-2 | -151447 |
| 8sealed | 303 | Yang, Shao-fu (1528) | Won 2-1 | +201467 |
| 9sealed | 294 | Tezuka, Yuuki (1508) | Won 2-1 | +181485 |
| top | average opponent: 1538record: 5-3 | new rating: 1485 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 2 | Takahashi, Daiki (1558) | Won 2-1 | +191483 |
| 3standard | 201 | Tamada, Ryoichi (1713) | Lost 1-2 | -141469 |
| 4standard | 273 | Yokote, Takeshi (1520) | Lost 0-2 | -171452 |
| 5standard | 571 | Hayashi, Hisayoshi (1502) | Won 2-0 | +191471 |
| 6standard | 316 | Nakamura, Ryota (1502) | Lost 1-2 | -171454 |
| 7standard | 485 | Kume, Takuma (1499) | Lost 0-2 | -171437 |
| top | average opponent: 1549record: 2-4 | new rating: 1437 | ||
| Grand Prix Taipei 2012 (RTR limited) | starting rating: 1452 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 3 | Lee, Simon [HKG] (1447) | Lost 1-2 | -181434 |
| 3sealed | 243 | shen, ming syun (1502) | Won 2-0 | +191453 |
| 4sealed | 154 | Mendoza, Edmond (1538) | Lost 1-2 | -161437 |
| 5sealed | 259 | Czyzewski, William (1468) | Won 2-0 | +181455 |
| 6sealed | 121 | Jaro, Ogie (1594) | Won 2-1 | +211476 |
| 7sealed | 92 | Yu, Ching Kong (1496) | Won 2-1 | +181494 |
| 8sealed | 106 | Sasaki, Yuusuke (1669) | Lost 0-2 | -151479 |
| 9sealed | 116 | Lefterov, Alexander (1600) | Lost 1-2 | -151464 |
| top | average opponent: 1539record: 4-4 | new rating: 1464 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 115 | Takahashi, Teruyoshi (1421) | Draw 1-1 | -11484 |
| 3modern | 264 | Yamashita, Hiroki (1636) | Lost 1-2 | -151469 |
| 4modern | 470 | Tamura, Tomoya (1500) | Lost 0-2 | -181451 |
| 5modern | 570 | Kosemura, Tomohiro (1463) | Won 2-1 | +181469 |
| 6modern | 453 | Satou, Masanori (1503) | Lost 0-2 | -171452 |
| top | average opponent: 1505record: 1-3-1 | new rating: 1452 | ||
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 14 | Takahashi, Yoshiyuki (1580) | Lost 0-2 | -151448 |
| 5standard | 80 | Tajima, Kenji (1471) | Won 2-0 | +181466 |
| 6standard | 101 | Kuo, Tzu-Ching (2023) | Lost 0-2 | -91457 |
| 7standard | 139 | Baba, Yasunori (1742) | Lost 0-2 | -131444 |
| 8standard | 174 | Itou, Masayoshi (1542) | Won 2-0 | +201464 |
| 9standard | 135 | Suzuki, Keisuke (1633) | Won 2-1 | +211485 |
| top | average opponent: 1665record: 3-3 | new rating: 1485 | ||
| Grand Prix Kitakyushu 2009 (ZEN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 158 | Tsunemoto, Makoto (1459) | Lost 1-2 | -181482 |
| 2sealed | 141 | Yoshimura, Yuuki (1479) | Lost 1-2 | -191463 |
| top | average opponent: 1469record: 0-2 | new rating: 1463 | ||
| Grand Prix Niigata 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 221 | SHIIYA, KIYOSHI (1500) | Lost 1-2 | -181482 |
| 2sealed | 235 | Igarashi, Jun (1478) | Won 2-0 | +181500 |
| 3sealed | 153 | Kanaya, Yoshihisa (1503) | Won 2-1 | +181518 |
| 4sealed | 137 | Suzuki, Shoichi (1563) | Lost 1-2 | -171501 |
| 5sealed | 213 | Kasuga, Takashi (1448) | Won 2-1 | +171518 |
| 6sealed | 191 | Itou, Motoaki (1540) | Lost 0-2 | -181500 |
| top | average opponent: 1506record: 3-3 | new rating: 1500 | ||