Otuka, Ryutaro
Current rating: 1434
Record: 20-27-3
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1452 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 187 | Mita, Yoshihito (1451) | Lost 0-2 | -181434 |
| top | record: 0-1 | new rating: 1434 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 742 | Kuno, Takashi (1536) | Lost 0-2 | -171430 |
| 2standard | 860 | Kobayashi, Yuki9104 (1381) | Won 2-1 | +181448 |
| 3standard | 959 | Urano, Shota (1515) | Lost 1-2 | -171431 |
| 4standard | 1012 | Ogsawara, Akira (1355) | Won 2-1 | +161447 |
| 5standard | 885 | Takai, Shunichi (1501) | Won 2-1 | +191466 |
| 6standard | 514 | Matsuzaki, Eiji (1475) | Won 2-0 | +191485 |
| 7standard | 490 | Toma, Hiroto (1620) | Lost 0-2 | -161469 |
| 8standard | 538 | Ichimi, Kenji (1504) | Lost 0-2 | -171452 |
| top | average opponent: 1486record: 4-4 | new rating: 1452 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1397 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 26 | Mukai, Hiroaki (1429) | Lost 0-2 | -181379 |
| 2sealed | 610 | Watanabe, Takayuki (1456) | Lost 0-2 | -161363 |
| 3sealed | 1140 | Matsuzawa, Ryo (1467) | Won 2-1 | +201383 |
| 4sealed | 903 | Ishizaki, Yoshiki (1555) | Lost 1-2 | -151368 |
| 5sealed | 986 | Seki, Manabu (1458) | Won 2-0 | +191387 |
| 6sealed | 724 | Suzuki, Takahiro9892 (1478) | Won 2-1 | +201407 |
| 7sealed | 561 | Kosaka, Yuki (1522) | Won 2-1 | +201427 |
| 8sealed | 505 | Matsuda, Kenji (1523) | Won 2-1 | +201447 |
| top | average opponent: 1486record: 5-3 | new rating: 1447 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1380 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 1069 | Sakai, Kengo (1398) | Won 2-1 | +191399 |
| 2standard | 85 | Hung, Hsun Hao (1686) | Draw 1-1 | +51404 |
| 3standard | 749 | Miura, Kunio (1483) | Lost 0-2 | -171387 |
| 4standard | 1094 | Ando, Masato (1499) | Lost 1-2 | -161371 |
| 5standard | 1279 | Togawa, Syuuichi (1484) | Lost 0-2 | -161355 |
| 6standard | 1368 | Sumikawa, Daiki (1376) | Won 2-1 | +191374 |
| 7standard | 1151 | Nakamura, Satoshi (Chiba) (1468) | Won 2-1 | +201394 |
| 8standard | 907 | Kaneko, Toshiki (1466) | Draw 1-1 | +11395 |
| 9standard | 821 | Adachi, Naohiko (1499) | Draw 1-1 | +21397 |
| top | average opponent: 1484record: 3-3-3 | new rating: 1397 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1410 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 512 | Hirao, Takanori (1500) | Lost 1-2 | -161394 |
| 2sealed | 940 | Kondo, Yusuke (1496) | Lost 1-2 | -161378 |
| 3sealed | 1126 | Kaneko, Kentaro (1480) | Won 2-1 | +191397 |
| 4sealed | 924 | Furukawa, Takehito (1453) | Lost 1-2 | -171380 |
| top | average opponent: 1482record: 1-3 | new rating: 1380 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1403 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 248 | Yamamoto, Kouhei4542 (1500) | Won 2-0 | +201423 |
| 2sealed | 60 | Hatta, Tetsuya (1502) | Lost 1-2 | -171406 |
| 3sealed | 436 | Masuda, Ryou (1501) | Lost 0-2 | -161390 |
| 4sealed | 416 | Maejima, Yuya (1466) | Won 2-0 | +191409 |
| 5sealed | 277 | Isobe, Jyunichi (1517) | Won 2-0 | +201429 |
| 6sealed | 312 | Muraoka, Hideaki (1374) | Lost 1-2 | -191410 |
| top | average opponent: 1477record: 3-3 | new rating: 1410 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 225 | Iriki, Ryou (1594) | Lost 0-2 | -151418 |
| 2sealed | 386 | Aoki, Toshihito (1415) | Lost 0-2 | -181400 |
| 3sealed | 522 | Miki, Takatoshi (1464) | Won 2-0 | +191419 |
| 4sealed | 366 | Nakamura, Hisashi (1531) | Lost 1-2 | -161403 |
| top | average opponent: 1501record: 1-3 | new rating: 1403 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 632 | Hirose, Yoshiyuki (1532) | Lost 0-2 | -171449 |
| 3sealed | 810 | Takimoto, Yusuke (1641) | Lost 1-2 | -151434 |
| 4sealed | 878 | Endo, Shinsaku (1482) | Won 2-1 | +191453 |
| 5sealed | 788 | Nakazawa, Yusuke (1320) | Lost 0-2 | -201433 |
| top | average opponent: 1494record: 1-3 | new rating: 1433 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 134 | Maegawa, Tooru (1586) | Lost 0-2 | -161484 |
| 2standard | 327 | Yasui, Tomoyuki (1483) | Lost 1-2 | -181466 |
| 3standard | 411 | Ueda, Tadahiko (1282) | Won 2-0 | +141480 |
| 4standard | 348 | Date, Hiroshi (1535) | Lost 1-2 | -171463 |
| 5standard | 350 | Saeki, Takayuki (1462) | Won 2-0 | +181481 |
| 6standard | 277 | Sakuma, Toshimitsu (1611) | Lost 0-2 | -151466 |
| top | average opponent: 1493record: 2-4 | new rating: 1466 | ||