Ishibashi, Katsumi
Current rating: 1748 (#3986)
Record: 31-14-3
| Grand Prix Sendai 2004 (DST limited) | starting rating: 1735 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 174 | Shimizu, Hajime (1632) | Won 2-1 | +161751 |
| 2sealed | 21 | Suzuki, Nobuyoshi (1517) | Lost 1-2 | -221729 |
| 3sealed | 191 | Murakami, Kazuki (1500) | Won 2-0 | +141743 |
| 4sealed | 91 | Kanazawa, Naoko (1398) | Won 2-0 | +121755 |
| 5sealed | 43 | Gomersall, Sam (1768) | Lost 1-2 | -181737 |
| 6sealed | 126 | Ogura, Ryou (1564) | Lost 1-2 | -211716 |
| 7sealed | 115 | Takahashi, Kazunari (1503) | Won 2-1 | +141730 |
| 8sealed | 88 | Nose, Koji (1708) | Won 2-0 | +181748 |
| top | average opponent: 1574record: 5-3 | new rating: 1748 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1659 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 48 | Sakata, Tomoki (1518) | Won 2-0 | +161675 |
| 3block | 62 | Muramatsu, Daisuke (1530) | Won 2-1 | +151690 |
| 4block | 45 | Yokosuka, Tomohiro (1609) | Lost 0-2 | -191671 |
| 5block | 119 | Kunugi, Ryou (1502) | Lost 0-2 | -221649 |
| 6block | 150 | Mizuno, Akimitsu (1458) | Won 2-1 | +151664 |
| 7block | 138 | Saitou, Yuu (1474) | Won 2-1 | +151679 |
| 8block | 75 | Ueno, Shinichi (1583) | ID | 01679 |
| 9block | 91 | Sasahara, Yasufumi (1559) | Lost 0-2 | -211658 |
| 10block | 97 | Kochi, Daiki (1536) | Won 2-1 | +161674 |
| 11block | 80 | Kito, Takeshi (1547) | Lost 0-2 | -201654 |
| 12block | 87 | Takaishi, Yuuri (1540) | Won 2-0 | +161670 |
| 13block | 69 | Nishino, Kenta (1636) | Won 2-0 | +171687 |
| 14block | 54 | Kuroda, Yousuke (1569) | Won 2-0 | +161703 |
| 15block | 40 | Ohno, Isao (1590) | Won 2-0 | +161719 |
| 16block | 28 | Takeda, Takamichi (1617) | Won 2-0 | +161735 |
| top | average opponent: 1551record: 10-4-1 | new rating: 1735 | ||
| Grand Prix Sapporo 2002 (Odyssey block) | starting rating: 1590 | |||
| round | table | opponent (rating) | result | Δrating |
| 3block | 56 | Sato, Naoshi (1536) | Won 2-1 | +171607 |
| 4block | 44 | Asahara, Akira (1705) | Lost 0-2 | -161591 |
| 5block | 79 | Hirakawa, Kenshiro (1519) | Lost 1-2 | -201571 |
| 6block | 125 | Sugiki, Takafumi (1600) | Won 2-0 | +191590 |
| 7block | 82 | Sakurada, Kouichi (1505) | Won 2-1 | +161606 |
| 8block | 7 | Yokoyama, Tadashi (1765) | Won 2-1 | +211627 |
| 9block | 30 | Itou, Yusuke (1573) | Draw 1-1 | -11626 |
| 10block | 32 | Imai, Kimio (1516) | Won 2-1 | +161642 |
| 11block | 17 | Tsujimoto, Hideki (1680) | Won 2-0 | +191661 |
| 12block | 3 | Fukuchi, Takahiro (1620) | Lost 0-2 | -191642 |
| 13block | 5 | Akimoto, Shinichi (1580) | Won 2-1 | +171659 |
| 14block | 21 | Minami, Masashi (1662) | Draw 1-1 | 01659 |
| top | average opponent: 1605record: 7-3-2 | new rating: 1659 | ||
| Grand Prix Fukuoka 2002 (TOR limited) | starting rating: 1574 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 4 | Suzuki, Fumio (1506) | Won 2-1 | +171591 |
| 3sealed | 14 | Itou, Shin (1573) | Won 2-1 | +171608 |
| 4sealed | 13 | Lee, Sung-Bum (1436) | Won 2-1 | +151623 |
| 5sealed | 3 | Kuroda, Masashiro (1732) | Lost 0-2 | -161607 |
| 6sealed | 51 | Hojo, Naomasa (1618) | Lost 0-2 | -181589 |
| 7sealed | 75 | Ando, Reiji (1629) | Draw 1-1 | +11590 |
| top | average opponent: 1582record: 3-2-1 | new rating: 1590 | ||
| Grand Prix Shizuoka 2001 (ODY limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 182 | Tsujimura, Tsuyoshi (1556) | Won 2-1 | +191519 |
| 2sealed | 82 | Watanabe, Tomosumi (1518) | Won 2-1 | +181537 |
| 3sealed | 24 | Arahori, Kazuaki (1504) | Lost 1-2 | -191518 |
| 4sealed | 116 | Kaneko, Naoki (1501) | Won 2-0 | +181536 |
| 5sealed | 65 | Takayanagi, Michio (1539) | Won 2-1 | +181554 |
| 6sealed | 30 | Ishikawa, Ren (1646) | Lost 0-2 | -161538 |
| 7sealed | 99 | Nagato, Kazuo (1536) | Won 2-0 | +181556 |
| 8sealed | 69 | Date, Tsutomu (1554) | Won 2-1 | +181574 |
| top | average opponent: 1544record: 6-2 | new rating: 1574 | ||