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Koseki, Kouta
Current rating: 1608

Grand Prix Shizuoka 2018 (legacy) (legacy) starting rating: 1600
round table opponent (rating) result Δrating
1legacy 275 Nisimoto, Takuo (1377) Won 2-0 +141614
2legacy 263 Morishima, Ryouta (1475) Lost 1-2 -211593
3legacy 543 Nisikawa, Yuuki (1483) Won 2-1 +161609
4legacy 185 Obata, Koji (1464) Won 2-0 +161625
5legacy 102 Akita, Naoto (1526) Won 2-1 +161641
6legacy 77 Kuribayashi, Takayuki (1534) Lost 1-2 -201621
7legacy 214 He, Yue 8578 (1918) Lost 1-2 -131608
top average opponent: 1540record: 4-3 new rating: 1608

Grand Prix Kobe 2017 (modern) starting rating: 1550
round table opponent (rating) result Δrating
3modern 387 Hart, Jacob (1722) Won 2-1 +211571
4modern 286 Katagiri, Shinichi (1642) Lost 0-2 -161555
5modern 459 Sakamoto, Taiga (1500) Won 2-1 +171572
6modern 211 Masuda, Hiroki (1551) Won 2-0 +171589
7modern 128 Shimizu, Ryouta (1702) Lost 1-2 -161573
8modern 324 Yamamoto, Hideaki (1575) Won 2-1 +181591
9modern 220 Nakamura, Yuki 8131 (1698) Won 2-0 +201611
10modern 68 Che, Ling (1803) Won 2-1 +221633
11modern 37 Nagumo, Kazuya (1611) Lost 0-2 -191614
12modern 188 Yamane, Yuuki (1626) Lost 0-2 -171597
13modern 216 Furukawa, Hiroki (1787) Won 2-1 +211618
14modern 128 Asai, Kyosuke (1593) Lost 1-2 -181600
top average opponent: 1651record: 7-5 new rating: 1600

Grand Prix Shizuoka 2017 (AER standard) starting rating: 1607
round table opponent (rating) result Δrating
3standard 456 Horikoshi, Takayuki (1677) Lost 1-2 -171590
4standard 716 Hashimoto, Hiromune (1488) Lost 1-2 -201570
5standard 797 Koide, Yukua (1470) Lost 1-2 -201550
top average opponent: 1545record: 0-3 new rating: 1550

Grand Prix Tokyo 2016 (SOI standard) starting rating: 1636
round table opponent (rating) result Δrating
2standard 11 Shingo, Tanaka (1561) Won 2-1 +171653
3standard 416 Shimazu, Yoshiki (1544) Lost 0-2 -201633
4standard 769 Ogawara, Youhei (1489) Lost 1-2 -211612
5standard 846 Li, Chi (1619) Lost 0-2 -181594
6standard 1206 Hisamoto, Takashi (1501) Won 2-1 +171611
7standard 1007 Kondou, Shin (1508) Won 2-0 +161627
8standard 630 Kageyama, Koki (1511) Lost 1-2 -201607
top average opponent: 1533record: 3-4 new rating: 1607

Grand Prix Nagoya 2016 (OGW limited) starting rating: 1692
round table opponent (rating) result Δrating
1sealed 60 Tanaka, Kisuke (1472) Won 2-0 +141706
2sealed 402 Akada, Yasunori (1599) Won 2-1 +161722
3sealed 361 Matsuda, Yukio (1495) Lost 1-2 -221700
4sealed 777 Masukado, Kenta (1602) Lost 1-2 -201680
5sealed 812 Suzuki, Ryo (1510) Lost 1-2 -211659
6sealed 926 Miyoshi, Nobumitsu (1391) Lost 0-2 -231636
top average opponent: 1512record: 2-4 new rating: 1636

Grand Prix Kobe 2015 (BFZ standard) starting rating: 1572
round table opponent (rating) result Δrating
1standard 234 Taniguchi, Masayoshi (1520) Lost 1-2 -191553
2standard 897 Sugimoto, Renn (1409) Won 2-1 +151568
3standard 764 Nunotani, Kousuke (1594) Won 2-0 +191587
4standard 347 Sugizaki, Shunsuke (1519) Won 2-1 +161603
5standard 312 Nagae, Nobuyasu (1508) Won 2-0 +171620
6standard 264 Senba, Kotaro (1748) Won 2-1 +201640
7standard 66 Saito, Hirotsugu (1754) Won 2-0 +201660
8standard 97 Kitaoka, Takaaki (1574) Lost 1-2 -201640
9standard 151 Higuchi, Yuma (1565) Won 2-1 +171657
10standard 144 Yamakawa, Akihiro (1529) Won 2-1 +161673
11standard 47 Okada, Motohiro (1588) Won 2-1 +161689
12standard 45 Tanaka, Akira (1760) Won 2-1 +191708
13standard 21 Tsujikawa, Taiga (1720) Won 2-0 +191727
14standard 8 Miyata, Yuuya (1694) Lost 1-2 -191708
15standard 33 Gao, Tan (1804) Lost 1-2 -161692
top average opponent: 1619record: 11-4 new rating: 1692

Grand Prix Chiba 2015 (MM2 limited) starting rating: 1539
round table opponent (rating) result Δrating
1sealed 320 Cronin, Sean (1482) Won 2-0 +171556
2sealed 137 Nanjo, Masashi (1637) Won 2-1 +191575
3sealed 107 Rosinski, Dennis (1657) Lost 1-2 -161559
4sealed 360 Sawa, Masaki (1514) Won 2-0 +171576
5sealed 208 Umezawa, Hitoshi (1490) Won 2-0 +161592
6sealed 42 Ikeda, Hiroaki (1499) Won 2-0 +171609
7sealed 80 Yamamoto, Keiichi (1594) Lost 1-2 -191590
8sealed 100 Kamei, Kento (1555) Lost 1-2 -181572
top average opponent: 1554record: 5-3 new rating: 1572

Grand Prix Shizuoka 2015 (KTK limited) starting rating: 1540
round table opponent (rating) result Δrating
1sealed 290 Kimura, Shoji (1521) Won 2-0 +171557
2sealed 41 Ishii, Kenta (1530) Won 2-0 +181575
3sealed 88 Orihara, Jun (1606) Lost 1-2 -181557
4sealed 237 Kobayashi, Atsumu (1520) Lost 0-2 -181539
top average opponent: 1544record: 2-2 new rating: 1539

Grand Prix Yokohama 2010 (extended) starting rating: 1518
round table opponent (rating) result Δrating
1extended 416 Aihara, Hironori (1377) Won 2-1 +161534
2extended 151 Hirabuki, Tomo (1521) Won 2-1 +181552
3extended 44 Kowal, Brian (1688) Lost 1-2 -161536
4extended 137 Nonaka, Kentarou (1709) Won 2-1 +211557
5extended 124 Hashimoto, Yuu (1702) Lost 0-2 -151542
6extended 284 Shimodouzono, Shintaro (1486) Won 2-0 +171559
7extended 151 Kamei, Kazuhiko (1495) Lost 0-2 -191540
top average opponent: 1568record: 4-3 new rating: 1540

Grand Prix Niigata 2009 (M10 limited) starting rating: 1500
round table opponent (rating) result Δrating
1sealed 149 Tamaki, Yuusuke (1500) Won 2-0 +181518
2sealed 121 Chao, Peter (1620) Lost 0-2 -161502
3sealed 246 Shiroza, Shinichiro (1569) Lost 0-2 -171485
4sealed 249 Okauchi, Yuuta (1408) Won 2-1 +171502
5sealed 212 Miura, Yushiro (1386) Won 2-1 +161518
6sealed 113 Tanaka, Yu (1545) Won 2-1 +181536
7sealed 141 Kobashi, Motoki (1554) Lost 0-2 -181518
top average opponent: 1512record: 4-3 new rating: 1518