Koch, Alexander
Current rating: 1472
Record: 13-16-1
| Grand Prix Seattle 2018 (standard) (RIX standard) | starting rating: 1424 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 81 | Wu, Jia (1714) | Lost 1-2 | -131411 |
| 2standard | 507 | Iosso, Keith (1504) | Lost 0-2 | -161395 |
| 3standard | 661 | Hanson, Zachary (1460) | Won 2-0 | +191414 |
| 4standard | 567 | Cook, Jacob (1589) | Won 2-1 | +211435 |
| 5standard | 503 | Crone, Jason (1566) | Won 2-0 | +211456 |
| 6standard | 413 | McKeown, Zach (1448) | Won 2-1 | +171473 |
| 7standard | 300 | Wellenkamp, Blake (1336) | Lost 1-2 | -201453 |
| 8standard | 292 | Tsypkin, Jacob (1519) | Won 2-1 | +191472 |
| top | average opponent: 1517record: 5-3 | new rating: 1472 | ||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1478 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 78 | McDowell, Rory (1500) | Lost 1-2 | -181460 |
| 2standard | 652 | Wilson, Tyler (1417) | Lost 0-2 | -181442 |
| 3standard | 688 | Howard, Brian (1464) | Lost 0-2 | -181424 |
| top | average opponent: 1460record: 0-3 | new rating: 1424 | ||
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 173 | Mick, Joel (1549) | Won 2-0 | +191500 |
| 4modern | 327 | Peters, Stephen (1921) | Lost 0-2 | -101490 |
| 5modern | 314 | Cooper, Cody (1632) | Won 2-0 | +201510 |
| 6modern | 288 | Ziccardi, Andrew (1524) | Lost 0-2 | -181492 |
| 7modern | 421 | Tai, Ben Yan Hao (1559) | Lost 1-2 | -161476 |
| 8modern | 713 | Oshie, Brian (1552) | Won 2-1 | +191495 |
| 9modern | 596 | Kouri, Nicholas (1550) | Lost 0-2 | -171478 |
| top | average opponent: 1613record: 3-4 | new rating: 1478 | ||
| Grand Prix Vancouver 2017 (modern) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 2368 | Mura, Robert (1500) | Lost 1-2 | -181499 |
| 2modern | 2446 | Brittain, Jacob (1482) | Won 2-0 | +181517 |
| 3modern | 2346 | Postlewaite, John (1519) | Lost 1-2 | -181499 |
| 4modern | 2657 | Turner-Lynch, Samuel (1509) | Lost 1-2 | -181481 |
| top | average opponent: 1502record: 1-3 | new rating: 1481 | ||
| Grand Prix Portland 2016 (EMN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 61 | Beg, Zaiem (1511) | Draw 1-1 | 01500 |
| 2standard | 383 | Accobee, Darian (1482) | Lost 0-2 | -181482 |
| 3standard | 685 | Hayes, Coty (1482) | Won 2-0 | +181500 |
| 4standard | 525 | Vasudevan, Kaushik (1524) | Lost 1-2 | -181482 |
| 5standard | 634 | Aker, Clint (1500) | Won 2-0 | +191501 |
| 6standard | 477 | Belli, Joel (1497) | Won 2-0 | +181519 |
| 7standard | 348 | De Clerck, Aaron (1459) | Won 2-0 | +171536 |
| 8standard | 244 | Boleyn, Dylan (1535) | Lost 1-2 | -191517 |
| top | average opponent: 1499record: 4-3-1 | new rating: 1517 | ||