Grinstead, Jamie
Current rating: 1501
Record: 12-15-1
| Grand Prix Birmingham 2017 (modern) | starting rating: 1427 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 74 | Monck, Zachary (1500) | Won 2-0 | +191446 |
| 2modern | 29 | Quinn, Fabian (1546) | Won 0-0 | +201466 |
| 3modern | 28 | Covoni, Niccolo (1647) | Lost 0-2 | -151451 |
| 4modern | 288 | Rodriguez Diaz, Miguel Angel (1606) | Won 2-1 | +211472 |
| 5modern | 233 | Widawski, Xavier (1689) | Won 2-0 | +221494 |
| 6modern | 78 | Tumber, Mark (1497) | Won 2-0 | +181512 |
| 7modern | 53 | Hofmann, Mike (1781) | Lost 1-2 | -131499 |
| 8modern | 107 | Pike, Michael (1742) | Won 2-1 | +221521 |
| 9modern | 73 | Lo Conte, Michele (1635) | Lost 0-2 | -161505 |
| 10modern | 119 | Munk, Troels (1770) | Won 2-1 | +231528 |
| 11modern | 104 | Pinto, Antonio (1769) | Lost 1-2 | -141514 |
| 12modern | 183 | Kneeshaw, Louis (1649) | Won 2-0 | +211535 |
| 13modern | 154 | D'Elia, Gerardo (1661) | Lost 1-2 | -161519 |
| 14modern | 128 | Bom, Bernard (1512) | Draw 1-1 | 01519 |
| 15modern | 154 | Berglund, Bjorn (1542) | Lost 0-2 | -181501 |
| top | average opponent: 1637record: 8-6-1 | new rating: 1501 | ||
| Grand Prix Manchester 2014 (Theros block) | starting rating: 1392 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 26 | Brewer, Tom (1529) | Won 2-1 | +211413 |
| 2block | 26 | Best, Jahnu (1517) | Won 2-1 | +201433 |
| 3block | 26 | Gerschenson, Immanuel (1633) | Lost 0-2 | -151418 |
| 4block | 26 | Perez, Victor [ESP] (1475) | Won 2-0 | +191437 |
| 5block | 26 | Teoh, Yann Lee (1556) | Won 2-0 | +201457 |
| 6block | 26 | Duarte, Carlos (1668) | Lost 0-2 | -141443 |
| 7block | 26 | Russett, Charles (1534) | Lost 1-2 | -161427 |
| top | average opponent: 1559record: 4-3 | new rating: 1427 | ||
| Grand Prix Strasbourg 2013 (legacy) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 192 | Broinger, Francis (1459) | Lost 1-2 | -181444 |
| 2legacy | 339 | Fagiani, Federico (1481) | Lost 1-2 | -171427 |
| 3legacy | 465 | Hitzhaus, Manuel (1462) | Lost 0-0 | -171410 |
| 4legacy | 632 | Omer, Sana (1444) | Lost 1-2 | -181392 |
| top | average opponent: 1461record: 0-4 | new rating: 1392 | ||
| Grand Prix London 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 304 | Ravenshear, Stuart (1541) | Lost 0-2 | -171483 |
| 2sealed | 714 | Van Hecke, Eddy (1357) | Lost 1-2 | -211462 |
| top | average opponent: 1449record: 0-2 | new rating: 1462 | ||