Valentine, Samuel J
Current rating: 1486
Record: 4-5
| Grand Prix London 2015 (ORI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 313 | Salmon, Robert (1447) | Lost 1-2 | -191481 |
| 2standard | 305 | Woodrow, Ruth (1524) | Lost 0-2 | -171464 |
| 3standard | 492 | Lukasik, Filip M (1464) | Lost 1-2 | -181446 |
| 4standard | 521 | Popoola, Sola (1446) | Won 2-1 | +181464 |
| 5standard | 435 | Kelly, Ross (1498) | Won 2-1 | +181482 |
| 6standard | 378 | Hernandez Segura, Jose Miguel (1536) | Won 2-1 | +191501 |
| 7standard | 267 | Montefiori, Giovanni (1666) | Lost 1-2 | -151486 |
| 8standard | 246 | Wilder, Louis (1465) | Lost 0-2 | -181468 |
| 9standard | 220 | Wojtasik, Albert (1455) | Won 2-1 | +181486 |
| average opponent: 1500record: 4-5 | new rating: 1486 | |||