Yamakawa, Naoya
Current rating: 1376
Record: 1-8-1
| Grand Prix Yokohama 2012 (modern) | starting rating: 1425 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 347 | Kawamura, Kento (1647) | Lost 0-2 | -141411 |
| 2modern | 522 | Shioda, Masaki (1481) | Lost 1-2 | -171394 |
| 3modern | 603 | Yauchi, Naoto (1466) | Lost 1-2 | -171377 |
| 4modern | 689 | Yamasaki, Sadaharu (1212) | Draw 1-1 | -31374 |
| 5modern | 650 | Migishiro, Ayumu (1427) | Lost 1-2 | -171357 |
| 6modern | 581 | Sakai, Ryuuichi (1428) | Won 2-0 | +191376 |
| average opponent: 1444record: 1-4-1 | new rating: 1376 | |||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 80 | Oono, Takamasa (1443) | Lost 0-2 | -191481 |
| 2extended | 434 | Koyama, Yuji (1482) | Lost 1-2 | -181463 |
| 3extended | 470 | Tanaka, Masanori (1466) | Lost 0-2 | -181445 |
| 4extended | 495 | Kobayashi, Shigehisa (1312) | Lost 0-2 | -201425 |
| average opponent: 1426record: 0-4 | new rating: 1425 | |||