Kobayashi, Jotaro
Current rating: 1750 (#3873)
Record: 47-25
| Grand Prix Yokohama 2019 (modern) | starting rating: 1707 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 707 | Sano, Yutarou (1500) | Won 2-1 | +141721 |
| 2modern | 178 | Sakurai, Koki (1468) | Won 2-0 | +141735 |
| 3modern | 469 | Suzuki, Shota 7488 (1536) | Won 2-1 | +141749 |
| 4modern | 45 | Ohashi, Gaku (1657) | Won 2-1 | +171766 |
| 5modern | 101 | Wang, Chaofan (1531) | Lost 0-2 | -221744 |
| 6modern | 273 | Fujimoto, Kousaku (1487) | Won 2-0 | +131757 |
| 7modern | 121 | Hirokawa, Tatsuya 2023 (1573) | Lost 1-2 | -211736 |
| 8modern | 246 | Kanemoto, Masaki (1558) | Won 2-1 | +141750 |
| 9modern | 139 | Suzuki, Tomohiro (1577) | Won 2-0 | +151765 |
| 10modern | 69 | Murao, Keisuke (1605) | Won 2-1 | +151780 |
| 11modern | 78 | Sakaino, Yuta (1597) | Lost 0-2 | -211759 |
| 12modern | 104 | Hashizume, Yuuya (1566) | Won 2-1 | +151774 |
| 13modern | 79 | Oshima, Shimpei (1637) | Lost 0-2 | -211753 |
| 14modern | 124 | Matsuda, Issui (1646) | Lost 1-2 | -201733 |
| 15modern | 110 | Hata, Hideaki (1687) | Won 2-1 | +171750 |
| top | average opponent: 1575record: 10-5 | new rating: 1750 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1699 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 347 | Yoshihara, Shouta (1557) | Lost 1-2 | -201679 |
| 2legacy | 575 | Cheng, Victor (1351) | Won 2-0 | +121691 |
| 3legacy | 447 | Ochi, Kensuke (1463) | Won 2-0 | +141705 |
| 4legacy | 425 | Yamamoto, Masaki 1920 (1513) | Won 2-0 | +141719 |
| 5legacy | 259 | Miyazono, Takeshi (1722) | Won 2-1 | +181737 |
| 6legacy | 162 | Aka, Shunsuke (1572) | Won 2-0 | +151752 |
| 7legacy | 22 | Marumo, Tsubasa (1529) | Lost 0-2 | -221730 |
| 8legacy | 151 | Sato, Tatsuo (1491) | Won 2-0 | +141744 |
| 9legacy | 102 | Miyamoto, Yohei (1683) | Won 2-1 | +171761 |
| 10legacy | 78 | Johnson, James (1475) | Lost 1-2 | -231738 |
| 11legacy | 58 | Nishikawa, Tatsuya (1560) | Lost 1-2 | -211717 |
| 12legacy | 79 | Sawatari, Kai (1624) | Won 2-1 | +161733 |
| 13legacy | 77 | Nagakita, Makoto (1534) | Lost 0-2 | -221711 |
| 14legacy | 86 | Mizumoto, Hirotaka (1666) | Lost 0-2 | -191692 |
| 15legacy | 86 | Yamasaki, Yuuta (1512) | Won 2-0 | +151707 |
| top | average opponent: 1550record: 9-6 | new rating: 1707 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1657 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 397 | Shimizu, Yusuke (1359) | Won 2-0 | +131670 |
| 2sealed | 574 | Takahashi, Shunsuke (1522) | Won 2-0 | +151685 |
| 3sealed | 447 | Hoshide, Naonari (1427) | Won 2-0 | +141699 |
| 4sealed | 208 | Kakinoki, Junichi (1640) | Won 2-1 | +161715 |
| 5sealed | 12 | Ueki, Junichi (1491) | Won 2-0 | +141729 |
| 6sealed | 34 | Takano, Kodai (1645) | Lost 0-2 | -191710 |
| 7sealed | 81 | Furusawa, Reona (1492) | Won 2-0 | +141724 |
| 8sealed | 35 | Oshima, Yuki (1654) | Lost 0-2 | -191705 |
| 9sealed | 229 | Minagawa, Sho (1514) | Won 2-1 | +141719 |
| 10draft | 703 | Nakano, Tatsuhito (1599) | Lost 0-2 | -201699 |
| top | average opponent: 1534record: 7-3 | new rating: 1699 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1657 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 127 | Odachi, Kentarou (1438) | Won 2-1 | +141671 |
| 2standard | 402 | Tomioka, Takahiro (1535) | Won 2-0 | +151686 |
| 3standard | 580 | Takahashi, Ryo (Saitama) (1500) | Lost 0-2 | -211665 |
| 4standard | 774 | Itou, Satoru (1612) | Won 2-1 | +171682 |
| 5standard | 276 | Chye, Yian Hsiang (1986) | Lost 0-2 | -131669 |
| 6standard | 847 | Amano, Seiichi (1419) | Won 2-1 | +141683 |
| 7standard | 393 | Heatherington, Yuuta (1541) | Won 2-1 | +151698 |
| 8standard | 388 | Kato, Jun (1563) | Lost 1-2 | -201678 |
| 9standard | 531 | Narita, Yuu (1516) | Lost 1-2 | -211657 |
| top | average opponent: 1568record: 5-4 | new rating: 1657 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1630 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1003 | Masutani, Kazuhiro (1553) | Won 2-0 | +171647 |
| 2sealed | 970 | Sasaki, Yuuki (1497) | Won 2-1 | +151662 |
| 3sealed | 978 | Miyake, Ryohei (1532) | Won 2-1 | +161678 |
| 4sealed | 825 | Motomura, Tomoya (1826) | Won 2-1 | +201698 |
| 5sealed | 801 | Yamazaki, Motohiro (1570) | Lost 1-2 | -201678 |
| 6sealed | 939 | Morita, Yo (1691) | Lost 0-2 | -181660 |
| 7sealed | 906 | Isoda, Yusuke (1356) | Won 2-0 | +131673 |
| 8sealed | 924 | Kuze, Shouta (1784) | Lost 0-2 | -161657 |
| top | average opponent: 1601record: 5-3 | new rating: 1657 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 188 | Masutani, Kazuhiro (1500) | Lost 0-2 | -181482 |
| 2modern | 404 | Sano, Shigeaki (1382) | Won 2-1 | +161498 |
| 3modern | 365 | Ogura, Tomomasa (1502) | Won 2-0 | +181516 |
| 4modern | 171 | Abe, Masahide (1441) | Won 2-0 | +171533 |
| 5modern | 166 | Asakura, Takumi (1477) | Won 2-1 | +171550 |
| 6modern | 83 | Ishida, Hiroshi (1577) | Lost 1-2 | -181532 |
| 7modern | 168 | Ishino, Takuya (1541) | Won 2-0 | +191551 |
| 8modern | 118 | Mashima, Mitsuharu (1776) | Won 2-1 | +221573 |
| 9modern | 142 | Kawamura, Kazushi (1888) | Won 2-0 | +231596 |
| 10modern | 84 | Miyagi, Moto (1568) | Won 2-0 | +181614 |
| 11modern | 62 | Ito, Genki (1619) | Lost 0-2 | -181596 |
| 12modern | 80 | Nakamura, Masato2133 (1586) | Lost 1-2 | -181578 |
| 13modern | 102 | Yamano, Tatsuto (1335) | Won 2-1 | +131591 |
| 14modern | 56 | Tashiro, Kouichi (1716) | Won 2-0 | +201611 |
| 15modern | 65 | Isayama, Yusuke (1645) | Won 2-1 | +191630 |
| top | average opponent: 1570record: 11-4 | new rating: 1630 | ||