Ishitsuka, Hiroyuki
Current rating: 1509
Record: 34-37
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 345 | Tanaka, Ryou (1491) | Won 2-1 | +181501 |
| 2standard | 316 | Tanaka, Yu 6006 (1554) | Lost 1-2 | -171484 |
| 3standard | 704 | Ito, Akihiko (1505) | Won 2-1 | +181502 |
| 4standard | 452 | Honda, Rintaro (1868) | Lost 0-2 | -121490 |
| 5standard | 679 | Sato, Koji (1502) | Won 2-0 | +191509 |
| 6standard | 419 | Cho, Alex (1521) | Won 2-0 | +181527 |
| 7standard | 352 | Nakajima, Ryo (1510) | Lost 1-2 | -181509 |
| top | average opponent: 1564record: 4-3 | new rating: 1509 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1457 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 328 | Hiramitu, Ryosuke (1468) | Won 2-0 | +181475 |
| 2modern | 538 | Nakamura, Naomichi (1434) | Lost 1-2 | -191456 |
| 3modern | 914 | Hajime, Shogo (1497) | Won 2-1 | +191475 |
| 4modern | 432 | Yang, Liyan (1815) | Won 2-1 | +241499 |
| 5modern | 238 | Tanaka, Makoto (1329) | Lost 0-2 | -211478 |
| 6modern | 828 | Takano, Masato (1532) | Won 2-0 | +191497 |
| 7modern | 428 | Yamakawa, Yoshiyuki (1518) | Won 2-1 | +181515 |
| 8modern | 197 | Orimo, Yuto (1637) | Lost 0-2 | -151500 |
| 9modern | 316 | Kikuchi, Kouhei (1552) | Lost 0-2 | -171483 |
| top | average opponent: 1531record: 5-4 | new rating: 1483 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1493 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 64 | Nakaaki, Yosihara (1500) | Won 2-0 | +181511 |
| 2standard | 293 | Sakatani, Tsuyoshi (1513) | Lost 0-2 | -181493 |
| 3standard | 872 | Saito, Go (1522) | Lost 0-2 | -171476 |
| 4standard | 1168 | Takashima, Ryuichi (1528) | Lost 1-2 | -171459 |
| 5standard | 1149 | Matsuoka, Yoshiki (1472) | Lost 0-2 | -181441 |
| 6standard | 1142 | Kobayashi, Satoru (1395) | Won 2-0 | +171458 |
| 7standard | 1027 | Ota, Masahito (1428) | Lost 0-2 | -191439 |
| 8standard | 919 | Kannta, Hayashi (1415) | Won 2-1 | +181457 |
| top | average opponent: 1472record: 3-5 | new rating: 1457 | ||
| Grand Prix Kuala Lumpur 2016 (KLD standard) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 144 | Okuhara, Yuuki (1494) | Lost 1-2 | -181498 |
| 2standard | 165 | Tan, Jason (1444) | Lost 0-2 | -191479 |
| 3standard | 307 | Osman, Faadzil (1464) | Won 0-0 | +181497 |
| 4standard | 264 | Seow, Kelvin (1542) | Lost 0-2 | -181479 |
| 5standard | 312 | Jeffery, Joenathan Jeremmy (1462) | Won 2-1 | +181497 |
| 6standard | 267 | Iskandar Pino, Moazan Emran (1441) | Won 2-0 | +171514 |
| 7standard | 210 | Hasegawa, Takahiro (1397) | Won 2-0 | +161530 |
| 8standard | 183 | Lim, Jared (1524) | Lost 0-2 | -181512 |
| 9standard | 208 | Wang, Chris (1459) | Lost 1-2 | -191493 |
| top | average opponent: 1470record: 4-5 | new rating: 1493 | ||
| Grand Prix Singapore 2015 (modern) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 203 | Low, Adam (1457) | Lost 0-2 | -201516 |
| top | record: 0-1 | new rating: 1516 | ||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1432 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 71 | Kaneko, Yasuki (1518) | Lost 1-2 | -171415 |
| 3legacy | 268 | Takahashi, Akira (1589) | Won 2-1 | +211436 |
| 4legacy | 186 | Sakimoto, Shinya (1523) | Won 2-0 | +201456 |
| 5legacy | 60 | Nomura, Tsuyoshi (1598) | Won 2-1 | +201476 |
| 6legacy | 109 | Murase, Hiroshi (1892) | Lost 0-2 | -101466 |
| 7legacy | 193 | Murai, Tatsuya (1532) | Won 2-0 | +191485 |
| 8legacy | 56 | Yamamoto, Kouhei2453 (1731) | Won 2-1 | +221507 |
| 9legacy | 51 | Oshima, Takafumi (1548) | Won 2-0 | +191526 |
| 10legacy | 70 | Tsujimoto, Hideki (1745) | Lost 1-2 | -141512 |
| 11legacy | 95 | Dorsey, Brooks (1681) | Lost 0-2 | -151497 |
| 12legacy | 97 | Fukuda, Shouhei (1534) | Won 2-1 | +191516 |
| 13legacy | 95 | Watanabe, Shotaro (1489) | Won 2-0 | +171533 |
| 14legacy | 79 | Nagaro, Robert (1601) | Won 2-1 | +191552 |
| 15legacy | 61 | Hirata, Koutatsu (1626) | Lost 0-2 | -161536 |
| top | average opponent: 1615record: 9-5 | new rating: 1536 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 128 | Takano, Yuuki (1528) | Lost 1-2 | -171466 |
| 4modern | 276 | Goto, Taito2647 (1516) | Lost 0-2 | -171449 |
| 5modern | 410 | Morita, Akira (1482) | Lost 0-2 | -171432 |
| top | average opponent: 1509record: 0-3 | new rating: 1432 | ||
| Grand Prix Kuala Lumpur 2014 (THS limited) | starting rating: 1493 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 142 | Low Wye Liong, Daniel (1521) | Won 2-1 | +181511 |
| 3sealed | 16 | Wentao, Qi (1816) | Lost 1-2 | -121499 |
| 4sealed | 235 | Wang, Chih Ming (1621) | Won 2-1 | +201519 |
| 5sealed | 143 | Ng, Song Khim (1543) | Lost 0-2 | -181501 |
| 6sealed | 268 | Low, Zhi Long (1501) | Lost 0-2 | -181483 |
| top | average opponent: 1600record: 2-3 | new rating: 1483 | ||
| Grand Prix Singapore 2013 (RTR limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 133 | Bagaporo, Gil Manuel P (1550) | Won 2-0 | +201467 |
| 3sealed | 10 | Dunsford, Denny (1701) | Lost 0-2 | -141453 |
| 4sealed | 194 | Lai, Charles (1450) | Won 2-0 | +181471 |
| 5sealed | 71 | Koh, Kee Leong (1452) | Won 2-0 | +181489 |
| 6sealed | 100 | Lee, Al (1535) | Won 2-0 | +191508 |
| 7sealed | 18 | Chen, Si Jin (1598) | Lost 0-2 | -171491 |
| 8sealed | 84 | Eng, Tiang Wah (1590) | Lost 1-2 | -161475 |
| 9sealed | 94 | Shahabudin, Nur (1452) | Won 2-0 | +181493 |
| top | average opponent: 1541record: 5-3 | new rating: 1493 | ||
| Grand Prix Kobe 2008 (Lorwyn block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 124 | Umehara, Kei (1521) | Won 2-0 | +181518 |
| 2block | 201 | Sutou, Takuo (1645) | Lost 0-2 | -151503 |
| 3block | 233 | Suzuki, Masahiro (1485) | Lost 1-2 | -191484 |
| 4block | 357 | Kawaguchi, Hikaru (1400) | Lost 1-2 | -191465 |
| 5block | 335 | Tezuka, Yuuki (1453) | Lost 1-2 | -181447 |
| 6block | 297 | Takeshita, Yoshiyasu (1448) | Won 2-0 | +181465 |
| 7block | 248 | Koyama, Masashi (1495) | Lost 0-2 | -181447 |
| top | average opponent: 1492record: 2-5 | new rating: 1447 | ||