Chikaoka, Kastuya
Current rating: 1498
Record: 4-4-1
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 66 | Yamada, Daiki (1452) | Draw 1-1 | -11520 |
| 2standard | 220 | Saitou, Daisuke (1479) | Lost 0-2 | -191501 |
| 3standard | 310 | Hisaki, Yuu (1393) | Won 2-0 | +161517 |
| 4standard | 283 | Sato, Genta (1486) | Lost 1-2 | -191498 |
| average opponent: 1453record: 1-2-1 | new rating: 1498 | |||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 200 | Suzuki, Kazushige (1472) | Won 2-1 | +181518 |
| 2extended | 80 | Toyota, Hiroki (1455) | Won 2-0 | +161534 |
| 3extended | 18 | Nagata, Masaya (1536) | Won 2-1 | +181552 |
| 4extended | 109 | Nakao, Munenari (1645) | Lost 0-2 | -161536 |
| 5extended | 135 | Komiya, Tadayoshi (1697) | Lost 0-2 | -151521 |
| average opponent: 1561record: 3-2 | new rating: 1521 | |||