Kozu, Yu
Current rating: 1406
Record: 14-21
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1434 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 504 | Asada, Naoya (1462) | Lost 0-2 | -171417 |
| 2sealed | 719 | Tawada, Naoto (1500) | Lost 0-2 | -171400 |
| 3sealed | 1113 | Kato, Yusuke9880 (1518) | Won 2-1 | +211421 |
| 4sealed | 942 | Murata, Yutaka (1599) | Lost 1-2 | -151406 |
| top | average opponent: 1520record: 1-3 | new rating: 1406 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 276 | Kuroiwa, Tadayuki (1521) | Lost 0-2 | -171447 |
| 2standard | 557 | Nishimura, Hikaru (1483) | Lost 0-2 | -171430 |
| 3standard | 959 | Kuwata, Masahito (1467) | Won 2-0 | +191449 |
| 4standard | 886 | Okamoto, Katsuki (1648) | Lost 0-2 | -151434 |
| top | average opponent: 1530record: 1-3 | new rating: 1434 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 558 | Hashikami, Taisuke (1462) | Lost 0-2 | -181480 |
| 2standard | 681 | Tanabe, Masatoshi (1442) | Lost 1-2 | -191461 |
| 3standard | 1028 | Ideguchi, Yasuhiro (1493) | Won 2-1 | +181479 |
| 4standard | 906 | Kashima, Yuuki (1564) | Lost 1-2 | -161463 |
| 5standard | 957 | Wu, Yanfei (1537) | Lost 1-2 | -171446 |
| 6standard | 906 | Tanaka, Hiroto (1453) | Won 2-1 | +181464 |
| top | average opponent: 1492record: 2-4 | new rating: 1464 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1541 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 699 | Nodu, Keigo (1558) | Won 2-1 | +181559 |
| 2sealed | 48 | Isomura, Takuya (1485) | Lost 0-2 | -191540 |
| 3sealed | 889 | Boss, Matt (1609) | Lost 0-2 | -171523 |
| 4sealed | 1032 | Kaneko, Hiroto (1422) | Won 2-1 | +161539 |
| 5sealed | 555 | Sakane, Kota (1552) | Lost 1-2 | -181521 |
| 6sealed | 796 | Murakami, Mikihisa (1487) | Lost 0-2 | -181503 |
| 7sealed | 693 | Aota, Hidekazu (1462) | Won 2-1 | +171520 |
| 8sealed | 533 | Oku, Yusuke (1312) | Lost 1-2 | -221498 |
| top | average opponent: 1486record: 3-5 | new rating: 1498 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 14 | Watanabe, Tatsuma (1500) | Won 2-0 | +181518 |
| 2sealed | 348 | Ootake, Takeshi (1635) | Lost 0-2 | -161502 |
| 3sealed | 774 | Hasebe, Sho (1594) | Won 2-0 | +201522 |
| 4sealed | 591 | Kumagai, Riku (2009) | Lost 1-2 | -101512 |
| 5sealed | 783 | Fujiwara, Ryoji (1621) | Won 2-1 | +201532 |
| 6sealed | 617 | Takami, Yuta (1540) | Won 2-0 | +181550 |
| 7sealed | 232 | Urasawa, Taiji (1757) | Lost 0-2 | -141536 |
| 8sealed | 602 | Nakaya, Shinya (1546) | Won 2-1 | +181554 |
| 9sealed | 350 | Ooi, Masaki (1533) | Won 2-0 | +181572 |
| 10draft | 79 | Kitayama, Masaya (1898) | Lost 0-2 | -131559 |
| 11draft | 280 | Shoji, Hayato (1543) | Lost 0-2 | -181541 |
| 13draft | 301 | Kato, Masaaki (1530) | Won 2-0 | +181559 |
| 14draft | 179 | Lee, Taehyoung (1547) | Lost 0-2 | -181541 |
| top | average opponent: 1635record: 7-6 | new rating: 1541 | ||