Rosen, Ethan
Current rating: 1340
Record: 9-20
| Grand Prix Los Angeles 2019 (modern) | starting rating: 1356 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 264 | Sulser, Donavin (1496) | Lost 0-2 | -161340 |
| top | record: 0-1 | new rating: 1340 | ||
| Grand Prix Oakland 2019 (modern) | starting rating: 1385 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 260 | Weaver, Brandon (1499) | Lost 1-2 | -161369 |
| 2modern | 297 | Odom, Weston (1440) | Lost 1-2 | -171352 |
| 3modern | 488 | Klatt, Todd (1427) | Won 2-0 | +201372 |
| 4modern | 432 | McGlashan, Nicholas (1481) | Lost 0-2 | -161356 |
| top | average opponent: 1462record: 1-3 | new rating: 1356 | ||
| Grand Prix Las Vegas 2018 (limited) (DOM limited) | starting rating: 1400 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 193 | Godines, Carter (1483) | Lost 0-2 | -161384 |
| 2sealed | 584 | Patino, Andrew (1553) | Won 2-1 | +211405 |
| 3sealed | 580 | Bittner, Kenneth (1483) | Lost 1-2 | -171388 |
| 4sealed | 598 | Herberholz, Mark (1889) | Lost 1-2 | -91379 |
| 5sealed | 649 | Debronsky, Darin (1462) | Won 2-0 | +191398 |
| 6sealed | 527 | Sawyer, Heather (1365) | Won 2-0 | +181416 |
| 7sealed | 398 | Martinez, Ernesto (1465) | Lost 1-2 | -181398 |
| 8sealed | 336 | Cuppoletti, Brandon (1652) | Lost 0-2 | -131385 |
| top | average opponent: 1544record: 3-5 | new rating: 1385 | ||
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 155 | Haptonstall, Jayson (1500) | Lost 1-2 | -171428 |
| 2modern | 611 | Hallock, Cody (1488) | Lost 0-2 | -171411 |
| 4modern | 741 | Tracy, Ben (1484) | Won 2-0 | +191430 |
| 5modern | 626 | Shagla-McKotch, Alexander (1447) | Lost 1-2 | -181412 |
| 6modern | 627 | Ward, Johnathan (1483) | Won 2-0 | +201432 |
| 7modern | 524 | Nguyen, Michael (1572) | Lost 1-2 | -161416 |
| 8modern | 445 | Flanzer, Jason (1522) | Lost 0-2 | -161400 |
| top | average opponent: 1499record: 2-5 | new rating: 1400 | ||
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 597 | Wolff, Steafen (1500) | Won 2-0 | +181518 |
| 2sealed | 233 | Mooney, David (1520) | Lost 0-2 | -181500 |
| 3sealed | 715 | Bennett, Stephen (1556) | Lost 1-2 | -171483 |
| 4sealed | 826 | Burkart, Jonathan (1433) | Won 2-1 | +171500 |
| 5sealed | 791 | Bass, Michael (1515) | Lost 0-2 | -181482 |
| 6sealed | 832 | Larson, Zac (1440) | Lost 0-2 | -181464 |
| 7sealed | 717 | Zezula, Thomas (1431) | Lost 0-2 | -191445 |
| 8sealed | 601 | Davenport, Tatiana (1447) | Won 2-0 | +181463 |
| 9sealed | 512 | Solomon, Nick (1443) | Lost 1-2 | -181445 |
| top | average opponent: 1476record: 3-6 | new rating: 1445 | ||