Sasaki, Ken
Current rating: 1526
Record: 41-39-1
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1523 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 243 | Nakajima, Hajime (1506) | Won 2-1 | +181541 |
| 2pioneer | 160 | Tsutsumi, Yukihiro (1447) | Won 2-0 | +161557 |
| 3pioneer | 186 | Itou, Masahiro1014 (1474) | Lost 0-2 | -191538 |
| 4pioneer | 501 | Saito, Shinya (1887) | Lost 0-2 | -121526 |
| 5pioneer | 461 | Yamasaki, Yuuta (1469) | Won 2-1 | +171543 |
| 6pioneer | 437 | Shimada, Masahiko (1730) | Won 2-1 | +211564 |
| 7pioneer | 327 | Suzuki, Toru (1555) | Lost 1-2 | -181546 |
| 8pioneer | 326 | Sawada, Ryo (1419) | Lost 0-2 | -201526 |
| top | average opponent: 1561record: 4-4 | new rating: 1526 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1492 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 299 | Ochi, Takushi (1419) | Lost 1-2 | -191473 |
| 2sealed | 705 | Matsushima, Tsutomu (1453) | Won 2-1 | +171490 |
| 3sealed | 737 | Takehana, Atsushi (1467) | Won 2-1 | +181508 |
| 4sealed | 534 | Yamazaki, Yuki (1508) | Lost 0-2 | -181490 |
| 5sealed | 730 | Yamamoto, Shohei 2804 (1506) | Won 2-1 | +181508 |
| 6sealed | 384 | Saito, Ryo 6701 (1582) | Lost 0-2 | -171491 |
| 7sealed | 598 | Kageyama, Taiki (1408) | Won 2-1 | +171508 |
| 8sealed | 382 | Ogura, Tomomasa (1359) | Won 2-0 | +151523 |
| top | average opponent: 1463record: 5-3 | new rating: 1523 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 742 | Shigaki, Tomoya (1509) | Lost 1-2 | -171432 |
| 2modern | 860 | Mukasa, Yoshiya (1577) | Lost 0-2 | -161416 |
| 3modern | 1150 | Ikeda, Tomohiko (1414) | Won 2-0 | +181434 |
| 4modern | 1035 | Lee, Jaeic (1461) | Won 2-0 | +191453 |
| 5modern | 876 | Takeda, Noriaki (1449) | Won 2-0 | +181471 |
| 6modern | 468 | Kobayashi, Shigeyuki (1503) | Lost 0-2 | -181453 |
| 7modern | 668 | Komizo, Isao (1506) | Won 2-0 | +191472 |
| 8modern | 433 | Itou, Manabu (1562) | Won 2-0 | +201492 |
| top | average opponent: 1498record: 5-3 | new rating: 1492 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 499 | Shibata, Takahiro (1459) | Won 2-0 | +181502 |
| 2standard | 364 | Oohashi, Toshiyuki (1734) | Lost 0-2 | -141488 |
| 3standard | 762 | Nomura, Hiroshi (1559) | Lost 1-2 | -171471 |
| 4standard | 950 | Fujii, Kento (1404) | Lost 1-2 | -191452 |
| 5standard | 964 | Tsuge, Kyohei (1461) | Won 2-0 | +181470 |
| 6standard | 783 | Ohara, Wataru (1423) | Lost 0-2 | -181452 |
| 7standard | 757 | Shiohata, Ryosuke (1379) | Lost 0-2 | -201432 |
| 8standard | 728 | Narumi, Masaru (1344) | Won 2-1 | +171449 |
| top | average opponent: 1470record: 3-5 | new rating: 1449 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1541 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 424 | Kojima, Yuki (1504) | Lost 1-2 | -181523 |
| 2sealed | 872 | Ooi, Adrian (1495) | Lost 0-2 | -191504 |
| 3sealed | 1033 | Uotsu, Atsushi (1398) | Lost 0-2 | -201484 |
| 4sealed | 1112 | Usami, Koji (1406) | Won 2-1 | +171501 |
| 5sealed | 973 | Seki, Kentaro (1665) | Lost 1-2 | -151486 |
| 6sealed | 871 | Arakawa, Tomohiro (1445) | Won 2-1 | +171503 |
| 7sealed | 728 | Kashiwa, Tomohiro (1471) | Lost 1-2 | -191484 |
| top | average opponent: 1483record: 2-5 | new rating: 1484 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 253 | Hirata, Masanari (1394) | Lost 1-2 | -211506 |
| 2sealed | 643 | Susanto, Reynandi (1469) | Lost 0-2 | -181488 |
| 3sealed | 1005 | Murahata, Hiroyuki (1484) | Won 2-0 | +171505 |
| 4sealed | 886 | Fletcher, Owen (1543) | Won 2-1 | +191524 |
| 5sealed | 765 | Toshida, Shin'ichi (1454) | Won 2-1 | +171541 |
| 6sealed | 471 | Kawakami, Kazuto (1771) | Lost 1-2 | -141527 |
| 7sealed | 649 | Saitou, Yuusuke (1553) | Lost 1-2 | -181509 |
| 8sealed | 703 | Kitajima, Ryoko (1452) | Won 2-0 | +171526 |
| 9sealed | 627 | Ehara, Daisuke (1361) | Won 2-0 | +151541 |
| top | average opponent: 1498record: 5-4 | new rating: 1541 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1546 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 645 | Omuta, Shoya (1430) | Won 2-1 | +161562 |
| 2standard | 306 | Iwaki, Tetsuya (1522) | Lost 0-2 | -191543 |
| 3standard | 798 | Akita, Naoto (1595) | Lost 1-2 | -171526 |
| 4standard | 1155 | Okamoto, Jin (1706) | Lost 0-2 | -141512 |
| 5standard | 1080 | Yabe, Tosikazu (1436) | Lost 0-2 | -201492 |
| 6standard | 1135 | Okunaga, Yuuki (1360) | Won 2-0 | +161508 |
| 7standard | 1054 | Nagata, Satoshi (1387) | Won 2-1 | +161524 |
| 8standard | 890 | Takasawa, Yuuki (1526) | Lost 1-2 | -181506 |
| 9standard | 772 | Kihara, Ryou (1672) | Won 2-0 | +211527 |
| top | average opponent: 1515record: 4-5 | new rating: 1527 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1529 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 299 | Ishino, Hiroki (1602) | Lost 0-2 | -161513 |
| 2standard | 631 | Oku, Daisaku (1371) | Won 2-0 | +151528 |
| 3standard | 676 | Tanigawa, Kenichirou (1436) | Won 2-0 | +161544 |
| 4standard | 775 | Nakamura, Yusuke9902 (1518) | Won 2-1 | +181562 |
| 5standard | 475 | Arita, Ryuichi (1755) | Lost 0-2 | -151547 |
| 6standard | 478 | Takafuji, Masato (1511) | Won 2-0 | +181565 |
| 7standard | 519 | Munekata, Yuuki (1538) | Lost 1-2 | -191546 |
| top | average opponent: 1533record: 4-3 | new rating: 1546 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1568 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 681 | Takeda, Harunobu (1603) | Lost 0-2 | -171551 |
| 2standard | 837 | Sato, Motoki (1480) | Lost 1-2 | -191532 |
| 3standard | 894 | Tsukiji, Masayuki (1462) | Won 2-0 | +161548 |
| 4standard | 842 | Watanabe, Takashi (1480) | Lost 1-2 | -191529 |
| top | average opponent: 1506record: 1-3 | new rating: 1529 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 10 | Ukita, Takashi (1500) | Won 2-1 | +171573 |
| 2block | 111 | Kiuchi, Masataka (1499) | Lost 1-2 | -191554 |
| 3block | 401 | Ebihara, Hajime (1500) | Draw 1-1 | -11553 |
| 4block | 422 | Matsubayashi, Hidetada (1483) | Won 2-0 | +171570 |
| 5block | 270 | Fukumoto, Keisuke (1518) | Won 2-0 | +171587 |
| 6block | 164 | Kobayashi, Masanori (1569) | Lost 0-2 | -191568 |
| top | average opponent: 1512record: 3-2-1 | new rating: 1568 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 162 | Toyama, Yoichi (1500) | Won 2-0 | +181518 |
| 2sealed | 10 | Houwa, Osamu (1466) | Lost 0-2 | -191499 |
| 3sealed | 158 | Nishioka, Kazuya (1501) | Won 2-0 | +181517 |
| 4sealed | 77 | Yamashita, Kohji (1518) | Won 2-1 | +181535 |
| 5sealed | 40 | Adachi, Shingo (1571) | Won 2-0 | +191554 |
| 6sealed | 45 | Nakamura, Satoshi (1696) | Lost 1-2 | -161538 |
| 7sealed | 50 | Nakamura, Tamon (1537) | Won 2-0 | +181556 |
| top | average opponent: 1541record: 5-2 | new rating: 1556 | ||