Kubota, Sin
Current rating: 1513
Record: 21-21
| Grand Prix Yokohama 2019 (modern) | starting rating: 1510 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 457 | Itou, Taiga (1495) | Won 2-0 | +181528 |
| 2modern | 283 | Kakimoto, Yuki (1441) | Won 2-0 | +161544 |
| 3modern | 517 | Kouyama, Ryu (1481) | Won 2-0 | +171561 |
| 4modern | 179 | Sato, Tatsuo (1459) | Lost 1-2 | -201541 |
| 5modern | 178 | Kiwanont, Sukhum (1786) | Won 2-0 | +231564 |
| 6modern | 220 | Kuriyama, Takuya (1541) | Lost 1-2 | -191545 |
| 7modern | 217 | Motooka, Takahiro (1632) | Lost 0-2 | -161529 |
| 8modern | 421 | Koizumi, Yuma (1644) | Lost 1-2 | -161513 |
| top | average opponent: 1560record: 4-4 | new rating: 1513 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1472 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 690 | Mito, Kazuki (1500) | Won 2-0 | +191491 |
| 2standard | 429 | Suzuki, Takuya 1104 (1444) | Won 2-1 | +171508 |
| 3standard | 328 | Moriyama, Masahide (1651) | Won 2-0 | +201528 |
| 4standard | 267 | Hirami, Tomonori (1635) | Lost 0-2 | -161512 |
| 5standard | 398 | Satou, Wataru (1483) | Won 2-1 | +181530 |
| 6standard | 403 | Ookura, Takahiro (1485) | Won 2-1 | +171547 |
| 7standard | 241 | Martin-McEwen, Leroy (1695) | Lost 0-2 | -151532 |
| 8standard | 449 | Abe, Ryoji (1589) | Won 2-0 | +191551 |
| 9standard | 151 | Yamamoto, Tetsuji (1707) | Lost 0-2 | -151536 |
| 10standard | 179 | Nitta, Yuki (1667) | Won 2-0 | +201556 |
| 11standard | 131 | Yao, Shimeng (1804) | Lost 0-2 | -141542 |
| 12standard | 121 | Boku, Takashi (1739) | Lost 1-2 | -141528 |
| 13standard | 142 | Akai, Yusuke4836 (1498) | Won 2-1 | +171545 |
| 14standard | 110 | Tanaka, Fumiya 1717 (1534) | Lost 0-2 | -181527 |
| 15standard | 61 | Matsuda, Hideyuki (1570) | Lost 0-2 | -171510 |
| top | average opponent: 1600record: 8-7 | new rating: 1510 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1511 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 771 | Nakaigawa, Takeshi (1524) | Lost 1-2 | -171494 |
| 2sealed | 646 | Yamazaki, Hiroaki (1534) | Won 2-1 | +181512 |
| 3sealed | 887 | Saiga, Noriaki (1499) | Won 2-0 | +181530 |
| 4sealed | 347 | Kajiwara, Tomoki (1534) | Won 2-0 | +181548 |
| 5sealed | 503 | Takeda, Yoshihide (1484) | Lost 1-2 | -191529 |
| 6sealed | 603 | Kitahara, Junya (1444) | Lost 0-2 | -201509 |
| 7sealed | 618 | Takayama, Kiichiro (1433) | Lost 0-2 | -191490 |
| 8sealed | 544 | Kosaka, Yuki (1502) | Lost 0-2 | -181472 |
| top | average opponent: 1494record: 3-5 | new rating: 1472 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 466 | Osawa, Hiroaki (1485) | Lost 1-2 | -181482 |
| 2modern | 968 | Yoshimura, Motoki (1151) | Won 2-1 | +121494 |
| 3modern | 1143 | Yin, Yue (1731) | Lost 0-2 | -141480 |
| 4modern | 1171 | Kikuchi, Takashi (1294) | Won 2-1 | +151495 |
| 5modern | 877 | Yuta, Inaoka (1441) | Won 2-1 | +171512 |
| 6modern | 737 | Uehara, Masayuki (1524) | Won 2-0 | +181530 |
| 7modern | 532 | Koziol, Eric (1549) | Won 2-1 | +181548 |
| 8modern | 250 | Omonishi, Kojiro (1618) | Lost 0-2 | -161532 |
| 9modern | 385 | Chan, Andy 1391 (1538) | Won 2-0 | +181550 |
| 10modern | 218 | Paul, Benjamin (1525) | Lost 0-2 | -191531 |
| 11modern | 316 | Furusho, Kotaro (1420) | Lost 0-2 | -201511 |
| top | average opponent: 1480record: 6-5 | new rating: 1511 | ||