Obata, Shiou
Current rating: 1505
Record: 14-12-2 (GP) / 0-6 (professional)
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1507 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 138 | Tanaka, Shinichi (1500) | Won 2-0 | +181525 |
| 2sealed | 21 | Kadota, Shinichi (1497) | Lost 1-2 | -191506 |
| 3sealed | 412 | Kimura, Daisuke (1500) | Lost 0-2 | -181488 |
| 4sealed | 436 | Takimoto, Naoya (1395) | Won 2-0 | +161504 |
| 5sealed | 344 | Tanaka, Koichiro (1502) | Won 2-0 | +181522 |
| 6sealed | 178 | Aoki, Masahiro (1579) | Lost 0-2 | -171505 |
| top | average opponent: 1496record: 3-3 | new rating: 1505 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 214 | Shimizu, Yousuke (1500) | Lost 1-2 | -181469 |
| 2modern | 428 | Ohmoto, Masaya (1447) | Lost 0-2 | -191450 |
| 3modern | 626 | Ishihara, Susumu (1433) | Won 2-0 | +181468 |
| 4modern | 508 | Sone, Keiichi (1479) | Won 2-0 | +181486 |
| 5modern | 471 | Ooishi, Yutaka (1499) | Won 2-1 | +191505 |
| 6modern | 375 | Hiroyuki A., (1517) | Won 2-0 | +181523 |
| 7modern | 178 | Saito, Tomoya (1635) | Lost 0-2 | -161507 |
| top | average opponent: 1501record: 4-3 | new rating: 1507 | ||
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1362 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 79 | Murakami, Kazuya3837 (1517) | Won 2-1 | +211383 |
| 5standard | 39 | Senba, Kotaro (1644) | Draw 1-1 | +41387 |
| 6standard | 30 | Ishii, Hayato (1794) | Won 2-0 | +251412 |
| 7standard | 17 | Kimura, Takuto (1597) | Lost 0-2 | -141398 |
| 8standard | 46 | Tanigaki, Toshiyuki (1528) | Draw 1-1 | +21400 |
| 9standard | 86 | Ohno, Isao (1619) | Won 2-0 | +221422 |
| 10standard | 51 | Naka, Keiji (1534) | Won 2-1 | +201442 |
| 11standard | 32 | Tashiro, Hayato (1699) | Lost 0-2 | -131429 |
| 12standard | 45 | Saito, Tomoharu (1928) | Lost 0-2 | -101419 |
| 13standard | 52 | Nitobe, Takayuki (1620) | Won 2-1 | +221441 |
| 14standard | 36 | Harano, Takahiro (1553) | Won 2-1 | +201461 |
| 15standard | 21 | Sasaki, Yuuta (1926) | Won 2-0 | +261487 |
| top | average opponent: 1663record: 7-3-2 | new rating: 1487 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1404 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 145 | Kabeshita, Yoshito (1558) | Lost 1-2 | -151389 |
| 3extended | 347 | Ishii, Hayato (1776) | Lost 0-2 | -111378 |
| 4extended | 363 | Banba, Taiki (1487) | Lost 0-2 | -161362 |
| top | average opponent: 1607record: 0-3 | new rating: 1362 | ||
| Pro Tour Nice 2002 (TOR draft) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2draft | 53 | Le Saux, Rafael (1737) | Lost 1-2 | -141486 |
| 3draft | 106 | Major, Mike (1572) | Lost 0-2 | -161470 |
| 4draft | 149 | Ranks, Matthew (1664) | Lost 0-2 | -151455 |
| 5draft | 129 | Sighvatsson, Yngvi Omar (1429) | Lost 1-2 | -181437 |
| 6draft | 140 | Halter, James (1692) | Lost 0-2 | -141423 |
| 7draft | 119 | Horowitz, Steve (1372) | Lost 0-2 | -191404 |
| top | average opponent: 1578record: 0-6 | new rating: 1404 | ||