Niwa, Kohei
Current rating: 1544
Record: 58-60-1 (GP) / 4-4 (professional)
- 2001
- 2003
- 2004
- 2010
- 2011
- 2012
- 2013
- 2014
- 2015
- 2016
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 694 | Kawakami, Yoshinobu (1483) | Won 2-0 | +181503 |
| 2standard | 486 | Arita, Ryuichi (1733) | Won 2-0 | +221525 |
| 3standard | 628 | Lim, David (1535) | Won 2-1 | +181543 |
| 4standard | 132 | Itazu, Yoshihisa (1456) | Draw 1-1 | -11542 |
| 5standard | 182 | Matsunaga, Kenta (1537) | Lost 0-2 | -181524 |
| 6standard | 440 | Kyohei, Hamayama (1533) | Won 2-1 | +181542 |
| 7standard | 262 | Muramatsu, Kenichi (1552) | Lost 1-2 | -181524 |
| 8standard | 538 | Ishii, Taiyo (1537) | Won 2-1 | +181542 |
| 9standard | 340 | Iwamura, Ryouichi (1557) | Won 2-1 | +191561 |
| 10standard | 203 | Sumi, Kango (1575) | Won 2-1 | +181579 |
| 11standard | 146 | Miyaguni, Musashi (1576) | Lost 1-2 | -181561 |
| 12standard | 233 | Takayama, Kan (1640) | Lost 0-2 | -171544 |
| top | average opponent: 1559record: 7-4-1 | new rating: 1544 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 114 | Uchida, Kensuke (1440) | Won 2-1 | +161532 |
| 2standard | 275 | Hasegawa, Gaku (1729) | Won 2-1 | +221554 |
| 3standard | 470 | Taniguchi, Hiroaki (1722) | Lost 1-2 | -151539 |
| 4standard | 785 | Hirohata, Syo (1503) | Lost 1-2 | -191520 |
| 5standard | 768 | Ebihara, Hirotaka (1581) | Lost 1-2 | -171503 |
| 6standard | 821 | Watanabe, Shogo7192 (1486) | Lost 1-2 | -181485 |
| top | average opponent: 1577record: 2-4 | new rating: 1485 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1515 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 1177 | Itamura, Hirohide (1541) | Lost 0-2 | -171498 |
| 3sealed | 1084 | Masuda, Yuri (1496) | Won 2-0 | +181516 |
| 4sealed | 1054 | Hiroaki, Satou (1517) | Won 2-0 | +181534 |
| 5sealed | 938 | Ejima, Kazuki (1599) | Lost 1-2 | -171517 |
| 6sealed | 1087 | Yokoi, Hiroki (1519) | Won 2-1 | +181535 |
| 7sealed | 912 | Abe, Tooru (1476) | Lost 1-2 | -191516 |
| top | average opponent: 1525record: 3-3 | new rating: 1516 | ||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1513 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 189 | Tsumori, Youhei (1425) | Won 2-0 | +161529 |
| 3legacy | 63 | Kawano, Takahiro (1505) | Won 2-0 | +181547 |
| 4legacy | 109 | Lam, Joe (1699) | Lost 1-2 | -151532 |
| 5legacy | 134 | Hamada, Keisuke (1487) | Lost 1-2 | -191513 |
| 6legacy | 166 | Dionnet, Maxime (1407) | Won 2-1 | +161529 |
| 7legacy | 99 | Nomura, Ryosuke (1767) | Lost 1-2 | -141515 |
| top | average opponent: 1549record: 3-3 | new rating: 1515 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1564 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 635 | Iwami, Masaki (1516) | Lost 1-2 | -191545 |
| 3sealed | 691 | Ueno, Takamasa (1486) | Lost 1-2 | -191526 |
| 4sealed | 846 | Okamoto, Jin (1792) | Lost 0-2 | -131513 |
| top | average opponent: 1598record: 0-3 | new rating: 1513 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1557 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 505 | Syoujiki, Tomoya (1500) | Won 2-1 | +171574 |
| 4standard | 567 | Machida, Takatoshi (1616) | Won 2-0 | +181592 |
| 5standard | 533 | Naitou, Takashi (1739) | Won 2-0 | +211613 |
| 6standard | 503 | Miyake, Kyohei (1482) | Lost 0-2 | -201593 |
| 7standard | 527 | Terada, Tadashi (1591) | Won 2-1 | +181611 |
| 8standard | 529 | Miyauchi, Makoto (1817) | Won 2-0 | +211632 |
| 9standard | 626 | Kuo, Tzu-Ching (1862) | Lost 1-2 | -141618 |
| 10standard | 89 | Tsukagoshi, Tadaki (1651) | Lost 1-2 | -171601 |
| 11standard | 104 | Tomomura, Hitoshi (1468) | Lost 1-2 | -201581 |
| 12standard | 91 | Tsujikawa, Taiga (1665) | Lost 0-2 | -171564 |
| top | average opponent: 1639record: 5-5 | new rating: 1564 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 105 | Matsuda, Naoto (1539) | Lost 0-2 | -171482 |
| 4standard | 447 | Kanou, Yuuki (1518) | Won 2-0 | +181500 |
| 5standard | 367 | Tsukagoshi, Tadaki (1600) | Won 2-1 | +201520 |
| 6standard | 206 | Shibafuji, Shunsuke (1620) | Won 2-1 | +201540 |
| 7standard | 61 | Yokokura, Takeshi (1573) | Won 2-0 | +181558 |
| 8standard | 41 | Kuo, Tzu-Ching (1796) | Lost 0-2 | -131545 |
| 9standard | 60 | Takibana, Hitoshi (1536) | Won 2-1 | +181563 |
| 10standard | 103 | Yabuuchi, Michitarou (1598) | Won 2-0 | +181581 |
| 11standard | 42 | Arita, Kento (1708) | Lost 0-2 | -151566 |
| 12standard | 50 | Yamamoto, Kentaro (1892) | Won 2-1 | +231589 |
| 13standard | 40 | Furukawa, Hiroki (1708) | Won 0-0 | +201609 |
| 14standard | 40 | Aizawa, Yuuichi (1698) | Lost 1-2 | -161593 |
| 15standard | 52 | Jung, Dae-woong (1559) | Lost 0-2 | -191574 |
| 16standard | 54 | Jung, Tae-Wook (1582) | Lost 1-2 | -171557 |
| top | average opponent: 1638record: 8-6 | new rating: 1557 | ||
| Grand Prix Taipei 2012 (RTR limited) | starting rating: 1476 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 27 | Chang, Tao Liang (1518) | Won 2-1 | +191495 |
| 4sealed | 65 | Lai, Jin-Xun (1514) | Won 2-0 | +181513 |
| 5sealed | 8 | Tsurifune, Takashi (1495) | Won 2-1 | +181531 |
| 6sealed | 14 | Nakashima, Toshihiko (1501) | Lost 1-2 | -191512 |
| 7sealed | 35 | Jeong, Ki Myoung (1552) | Won 2-1 | +191531 |
| 8sealed | 27 | Liu, Zhueran (1611) | Lost 0-2 | -161515 |
| 9sealed | 47 | Jam, Shanron Nien Hsie (1633) | Lost 1-2 | -161499 |
| top | average opponent: 1546record: 4-3 | new rating: 1499 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 112 | Kanehira, Haruki (1431) | Won 2-1 | +171513 |
| 3modern | 17 | Hagiwara, Takeshi (1466) | Lost 0-2 | -191494 |
| 4modern | 356 | Negami, Hiroyuki (1513) | Won 2-0 | +191513 |
| 5modern | 127 | Mizutani, Yosuke (1475) | Lost 1-2 | -191494 |
| 6modern | 338 | Nikaidou, Satoshi (1517) | Lost 0-2 | -181476 |
| top | average opponent: 1481record: 2-3 | new rating: 1476 | ||
| Grand Prix Hiroshima 2011 (ISD standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 28 | Ueda, Takushi (1543) | Won 2-0 | +191501 |
| 3standard | 9 | Uchida, Momotarou (1648) | Lost 1-2 | -151486 |
| 4standard | 216 | Yuuki M., (1497) | Won 2-1 | +181504 |
| 5standard | 92 | Takagi, Takayuki (1870) | Won 2-0 | +241528 |
| 6standard | 103 | Sugita, Daichi (1571) | Lost 1-2 | -171511 |
| 7standard | 89 | Tamura, Ryo (1679) | Lost 1-2 | -151496 |
| top | average opponent: 1635record: 3-3 | new rating: 1496 | ||
| Pro Tour Nagoya 2011 (Scars block) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 164 | Kungurow, Siegfried (1492) | Lost 1-2 | -171446 |
| 2block | 118 | Kovac, Chase (1524) | Won 2-1 | +191465 |
| 3block | 100 | Stradner, Stefan (1780) | Lost 0-2 | -121453 |
| 4block | 151 | Preston, Zach (1551) | Won 2-0 | +201473 |
| 5block | 86 | Sakaguchi, Marshall (1468) | Won 2-0 | +171490 |
| 6draft | 41 | Sajgalik, Eduardo (1725) | Won 2-1 | +231513 |
| 7draft | 20 | Takagi, Takeshi (1794) | Lost 0-2 | -131500 |
| 8draft | 128 | Rovny, Robert (1521) | Lost 0-2 | -181482 |
| top | average opponent: 1607record: 4-4 | new rating: 1482 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1531 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 65 | Yamamoto, Kentaro (1853) | Lost 1-2 | -121519 |
| 3extended | 257 | Noro, Hitoshi (1500) | Lost 0-2 | -181501 |
| 4extended | 352 | Mukai, Hiroaki (1484) | Lost 0-2 | -191482 |
| 5extended | 428 | Aikawa, Shingo (1464) | Won 2-1 | +181500 |
| 6extended | 340 | Siritanaratkul, Bhavin (1480) | Lost 1-2 | -181482 |
| 7extended | 272 | Tamura, Satoshi (1465) | Lost 0-2 | -191463 |
| top | average opponent: 1541record: 1-5 | new rating: 1463 | ||
| Grand Prix Nagoya 2004 (5DN standard) | starting rating: 1535 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 38 | Yamamoto, Takao (1484) | Won 2-0 | +171552 |
| 2standard | 71 | Ogawa, Hiroyuki (1464) | Won 2-0 | +171569 |
| 3standard | 133 | Takashima, Masahide (1535) | Won 2-0 | +171586 |
| 4standard | 47 | Imura, Satoshi (1579) | Lost 1-2 | -181568 |
| 5standard | 142 | Yamaguchi, Shinya (1443) | Lost 1-2 | -201548 |
| 6standard | 177 | Syouyama, Youhei (1628) | Lost 0-2 | -171531 |
| top | average opponent: 1522record: 3-3 | new rating: 1531 | ||
| Grand Prix Sendai 2004 (DST limited) | starting rating: 1544 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 28 | Kounoike, Masaki (1506) | Won 2-0 | +171561 |
| 3sealed | 78 | Ozawa, Takahiro (1567) | Lost 1-2 | -181543 |
| 4sealed | 83 | Yanagisawa, Tadahiro (1598) | Won 2-0 | +191562 |
| 5sealed | 86 | Morita, Masahiko (2024) | Lost 1-2 | -101552 |
| 6sealed | 131 | Nomura, Eiji (1660) | Lost 0-2 | -161536 |
| 7sealed | 129 | Iwama, Yuki (1501) | Won 2-0 | +181554 |
| 8sealed | 75 | Nikkuni, Fumihito (1536) | Lost 0-2 | -191535 |
| top | average opponent: 1627record: 3-4 | new rating: 1535 | ||
| Grand Prix Shizuoka 2003 (MRD limited) | starting rating: 1565 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 33 | Watanabe, Yukitsugu (1522) | Won 2-0 | +171582 |
| 3sealed | 17 | Matsumoto, Hiroshi (1556) | Lost 1-2 | -191563 |
| 4sealed | 173 | Aizawa, Keiji (1488) | Lost 0-2 | -191544 |
| top | average opponent: 1522record: 1-2 | new rating: 1544 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1574 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 238 | Tominaga, Akira (1415) | Won 2-0 | +151589 |
| 2block | 6 | Nishioka, Kazuya (1485) | Won 2-1 | +161605 |
| 3block | 20 | Takakuwa, Minoru (1557) | Lost 0-2 | -191586 |
| 4block | 159 | Miura, Hiroyuki (1489) | Won 2-0 | +161602 |
| 5block | 53 | Shimada, Masatake (1718) | Lost 0-2 | -161586 |
| 6block | 194 | Imai, Takashi (1550) | Won 2-0 | +181604 |
| 7block | 76 | Ishiyama, Hiroki (1504) | Lost 1-2 | -201584 |
| 8block | 176 | Mori, Junpei (1519) | Lost 0-2 | -191565 |
| top | average opponent: 1530record: 4-4 | new rating: 1565 | ||
| Grand Prix Kyoto 2003 (LGN limited) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 81 | Takakuwa, Minoru (1502) | Won 2-0 | +181519 |
| 2sealed | 159 | Mochizuki, Kazuhiro (1431) | Lost 1-2 | -191500 |
| 3sealed | 226 | Numata, Yosuke (1500) | Won 2-1 | +181518 |
| 4sealed | 100 | Kobayashi, Masanori (1619) | Won 2-0 | +191537 |
| 5sealed | 99 | Kouno, Tomohiro (1523) | Lost 0-2 | -181519 |
| 6sealed | 149 | Ura, Tsuyoshi (1527) | Won 2-1 | +181537 |
| 7sealed | 80 | Yagi, Wataru (1499) | Won 2-0 | +181555 |
| 8sealed | 32 | Kubouchi, Naoki (1616) | Won 2-0 | +191574 |
| top | average opponent: 1527record: 6-2 | new rating: 1574 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 105 | Watanabe, Nobuhiko (1518) | Won 2-1 | +181518 |
| 3block | 42 | Oizaki, Takahiro (1537) | Won 2-0 | +191537 |
| 4block | 104 | Kurihara, Tomo (1535) | Lost 1-2 | -181519 |
| 5block | 113 | Yamao, Masakura (1518) | Won 2-0 | +181537 |
| 6block | 80 | Kusanagi, Kazuki (1599) | Lost 0-2 | -171520 |
| 7block | 162 | Arahori, Kazuaki (1484) | Lost 1-2 | -191501 |
| top | average opponent: 1532record: 3-3 | new rating: 1501 | ||