Brieger, John
Current rating: 1616
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1649 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 585 | Romero, Tyler (1500) | Lost 1-2 | -201629 |
| 2modern | 1032 | Meadows, Zachary (1450) | Lost 1-2 | -211608 |
| 3modern | 1237 | Yue, Jen (1366) | Won 2-1 | +131621 |
| 4modern | 1064 | Prentiss, Robert (1428) | Won 2-0 | +151636 |
| 5modern | 812 | Belty, Alex (1537) | Lost 0-2 | -201616 |
| top | average opponent: 1456record: 2-3 | new rating: 1616 | ||
| Grand Prix Madison 2015 (BFZ limited) | starting rating: 1544 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 130 | Rus, Daniel (1500) | Won 2-1 | +171561 |
| 2sealed | 35 | Borthwick, Matt (1512) | Won 2-1 | +171578 |
| 3sealed | 297 | Wood, Ben (1604) | Lost 0-2 | -171561 |
| 4sealed | 312 | Oldaker, Matt (1637) | Won 2-1 | +191580 |
| 5sealed | 246 | Knoer, Vicki (1534) | Won 2-1 | +171597 |
| 6sealed | 180 | Johnson, Richard (1455) | Won 2-0 | +161613 |
| 7sealed | 116 | Williams, David A (1825) | Lost 1-2 | -141599 |
| 8sealed | 1021 | Pineda, Jake (1472) | Won 2-1 | +151614 |
| 9sealed | 119 | Baumeister, Corey (1912) | Won 2-1 | +241638 |
| 10draft | 76 | Willoughby, Ethan (1590) | Won 2-0 | +171655 |
| 11draft | 20 | Mell, Daniel (1620) | Won 2-1 | +171672 |
| 12draft | 44 | Damo da Rosa, Paulo Vitor (2039) | Lost 1-2 | -111661 |
| 13draft | 51 | Dalke, Cody (1635) | Lost 0-2 | -191642 |
| 14draft | 12 | Carlson, Lukas (1691) | Won 2-0 | +191661 |
| 15draft | 51 | Rubin, Steve (2033) | Lost 1-2 | -121649 |
| top | average opponent: 1671record: 10-5 | new rating: 1649 | ||
| Grand Prix Pittsburgh 2011 (M12 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 187 | Feliciano, Josh (1500) | Won 2-1 | +181518 |
| 3standard | 95 | Berg, Tim (1732) | Lost 0-2 | -141504 |
| 4standard | 442 | Lafleur, Thayer (1561) | Won 2-1 | +191523 |
| 5standard | 188 | Spence, Zack (1576) | Lost 0-2 | -171506 |
| 6standard | 359 | Humphries, Jake (1470) | Won 2-0 | +171523 |
| 7standard | 165 | Helms, Sterling (1537) | Won 2-0 | +181541 |
| 8standard | 188 | Peacock, Robert (1611) | Won 2-1 | +201561 |
| 9standard | 132 | Spiess, Kurt (1640) | Lost 0-2 | -171544 |
| top | average opponent: 1578record: 5-3 | new rating: 1544 | ||