Penilla, John R
Current rating: 1446
Record: 4-7
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 929 | Kobayashi, Yusuke(sait (1500) | Won 2-1 | +181516 |
| 2sealed | 917 | M., Kenichi (1517) | Lost 0-2 | -181498 |
| 3sealed | 917 | Ando, Koyo (1601) | Lost 1-2 | -161482 |
| 4sealed | 1069 | K., Akinori (1482) | Lost 0-2 | -181464 |
| 5sealed | 1077 | Obata, Takayuki (1464) | Lost 0-2 | -181446 |
| average opponent: 1513record: 1-4 | new rating: 1446 | |||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 242 | Minoshima, Takenori (1400) | Won 2-0 | +161516 |
| 2modern | 264 | Kabe, Kazuki (1485) | Lost 1-2 | -181498 |
| 3modern | 547 | Kamekawa, Masashi (1552) | Lost 1-2 | -171481 |
| 4modern | 589 | Kurihara, Kanou (1438) | Won 2-1 | +171498 |
| 5modern | 350 | Nakamura, Ryouta (1550) | Lost 0-2 | -171481 |
| 6modern | 455 | Hasegawa, Takao (1452) | Won 2-1 | +171498 |
| average opponent: 1480record: 3-3 | new rating: 1498 | |||