Birch, Samuel
Current rating: 1450
Record: 8-12
| Grand Prix Phoenix 2020 (pioneer) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 2pioneer | 179 | Williams, Paul (1649) | Lost 1-2 | -151467 |
| 3pioneer | 270 | Barnett, Zachary (1525) | Lost 1-2 | -171450 |
| top | average opponent: 1587record: 0-2 | new rating: 1450 | ||
| Grand Prix Dallas-Fort Worth 2019 (modern) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 218 | Andrup, Alex (1706) | Won 2-0 | +221510 |
| 3modern | 84 | Detiveaux, Raymond (1638) | Lost 1-2 | -161494 |
| 4modern | 330 | Deylius, Matt (1629) | Lost 0-2 | -151479 |
| 5modern | 283 | Sadler, Peyton (1495) | Won 2-0 | +181497 |
| 6modern | 177 | Wiggins, Ethan (1641) | Lost 0-2 | -151482 |
| top | average opponent: 1622record: 2-3 | new rating: 1482 | ||
| Grand Prix Washington DC 2017 (HOU standard) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 6 | Kelley, Ryan (1374) | Won 2-0 | +161479 |
| 2standard | 58 | Goldman, Joseph (1511) | Lost 0-2 | -171462 |
| 3standard | 370 | Whitmore, Chad (1499) | Won 2-0 | +191481 |
| 4standard | 437 | Amor, Martin Miguel (1610) | Lost 0-2 | -161465 |
| 5standard | 471 | Boro, Isaac (1499) | Won 2-0 | +191484 |
| 6standard | 326 | Spano, Greggory (1785) | Won 2-1 | +231507 |
| 7standard | 297 | Doerrie, Mark (1509) | Won 2-1 | +181525 |
| 8standard | 134 | Huang, Hantao (1647) | Lost 0-2 | -161509 |
| 9standard | 291 | Bishop, Alyssa (1344) | Lost 1-2 | -211488 |
| top | average opponent: 1531record: 5-4 | new rating: 1488 | ||
| Grand Prix Richmond 2017 (AKH limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 264 | Sullivan, Michael (1450) | Lost 0-2 | -191481 |
| 2sealed | 428 | Cornett, Andrew (1525) | Lost 0-2 | -171464 |
| 3sealed | 748 | Blair, William (1464) | Won 2-1 | +181482 |
| 4sealed | 630 | Robinson, Damond (1431) | Lost 0-2 | -191463 |
| top | average opponent: 1467record: 1-3 | new rating: 1463 | ||