Yamaguchi, Kouichi (Kanagawa
Current rating: 1449
Record: 2-5
| Grand Prix Yokohama 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 283 | Tamura, Tetsu (1500) | Lost 0-2 | -181482 |
| 2modern | 426 | Muranaka, Hiroya (1542) | Lost 1-2 | -171465 |
| 3modern | 623 | Nishio, Yuuki (1465) | Won 2-1 | +181483 |
| 4modern | 525 | Konishi, Eigo (1481) | Won 2-1 | +181501 |
| 5modern | 528 | Imai, Ayato (1643) | Lost 1-2 | -151486 |
| 6modern | 535 | Satou, Katsuya (1482) | Lost 1-2 | -181468 |
| 7modern | 444 | Kira, Ryouichi (1451) | Lost 0-2 | -191449 |
| average opponent: 1509record: 2-5 | new rating: 1449 | |||