Giebelhausen, Peter
Current rating: 1435
Record: 13-17
| Grand Prix Las Vegas 2019 (modern) (modern) | starting rating: 1471 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 139 | Joyce, Rufus (1468) | Won 2-1 | +171488 |
| 2modern | 176 | O'Neal, Josh (1503) | Lost 1-2 | -171471 |
| 3modern | 427 | Shakhnovich, Denis (1519) | Lost 0-2 | -171454 |
| 4modern | 644 | Baxter, Nathan (1405) | Lost 1-2 | -191435 |
| 5modern | 669 | Kopac, Matt (1384) | Lost 0-2 | -191416 |
| 6modern | 607 | Kang, Ryker (1448) | Won 2-0 | +181434 |
| 7modern | 486 | Anid, Jacob (1465) | Won 2-0 | +191453 |
| 8modern | 379 | Couturier, Joseph (1436) | Lost 1-2 | -181435 |
| top | average opponent: 1453record: 3-5 | new rating: 1435 | ||
| Grand Prix Portland 2018 (modern) | starting rating: 1523 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 484 | Seaman, Patric (1455) | Lost 0-2 | -201503 |
| 2modern | 544 | Pardue, Kenneth (1641) | Won 2-0 | +211524 |
| 3modern | 418 | Brueseke, Benjamin (1727) | Lost 1-2 | -141510 |
| 4modern | 600 | Oesterblad, Daniel (1365) | Lost 1-2 | -211489 |
| 5modern | 680 | Heinonen, Sam (1464) | Lost 0-2 | -181471 |
| top | average opponent: 1530record: 1-4 | new rating: 1471 | ||
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1522 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 712 | Gilbert, Aaron (1500) | Lost 1-2 | -191503 |
| 2modern | 627 | Childers, James (1482) | Won 2-0 | +181521 |
| 3modern | 704 | Winston, Alexander (1484) | Won 2-1 | +171538 |
| 4modern | 469 | Kusiek, James (1497) | Won 2-1 | +181556 |
| 5modern | 394 | Wong, Gary (1748) | Lost 1-2 | -151541 |
| 6modern | 336 | Wang, Paul (1514) | Won 2-0 | +181559 |
| 7modern | 334 | Cordova, Dana (1491) | Lost 1-2 | -201539 |
| 8modern | 435 | Olvera, Bryan (1614) | Lost 0-2 | -161523 |
| top | average opponent: 1541record: 4-4 | new rating: 1523 | ||
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 803 | Fabiani, Pietro (1487) | Won 2-1 | +181518 |
| 2modern | 585 | Swanson, Matthew (1441) | Won 2-1 | +161534 |
| 3modern | 444 | Vega Parra, Francisco (1555) | Lost 0-2 | -171517 |
| 4modern | 770 | Budgell, Lane (1625) | Won 2-1 | +201537 |
| 5modern | 491 | Anderson, Jamie (1483) | Lost 1-2 | -191518 |
| 6modern | 535 | Stahl, Rasmus (1641) | Won 2-1 | +201538 |
| 7modern | 466 | Lassen, Nicholas (1671) | Lost 1-2 | -161522 |
| 8modern | 622 | Sandler, Dar (1492) | Lost 0-2 | -181504 |
| 9modern | 717 | Doerfler, Justin (1502) | Won 2-1 | +181522 |
| top | average opponent: 1544record: 5-4 | new rating: 1522 | ||