Knaff, Ariel
Current rating: 1577
Record: 23-20-1
| Grand Prix Sacramento 2018 (M19 limited) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 347 | Quigley, Shane (1500) | Won 2-0 | +171543 |
| 2sealed | 101 | Gripkey, Hans (1563) | Won 2-0 | +191562 |
| 3sealed | 101 | Hittner, John (1500) | Won 2-0 | +161578 |
| 4sealed | 2 | Bertoncini, Alex (1757) | Lost 1-2 | -141564 |
| 5sealed | 223 | Pisano, Rob (1914) | Won 2-1 | +241588 |
| 6sealed | 80 | Sherman, Sam (1912) | Lost 0-2 | -121576 |
| 7sealed | 191 | Myers, Roger (1572) | Won 2-0 | +171593 |
| 8sealed | 73 | Isaacs, Jason (1680) | Lost 1-2 | -161577 |
| top | average opponent: 1675record: 5-3 | new rating: 1577 | ||
| Grand Prix Portland 2016 (EMN standard) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 588 | Magallanes, Luis (1480) | Lost 1-2 | -191482 |
| 2standard | 436 | Pena, Gabriel (1482) | Won 2-0 | +181500 |
| 3standard | 458 | Hawkins, Donald (1552) | Won 2-1 | +191519 |
| 4standard | 325 | Cummings, Lex (1517) | Lost 0-2 | -181501 |
| 5standard | 436 | Wallace, Paul (1433) | Lost 1-2 | -191482 |
| 6standard | 511 | Thomas, Drew (1550) | Won 2-1 | +191501 |
| 7standard | 442 | Lee, Farand (1616) | Won 2-1 | +201521 |
| 8standard | 330 | Broadstone, Benjamin (1715) | Won 2-1 | +221543 |
| 9standard | 227 | Fisher, Wilson (1596) | Lost 0-0 | -171526 |
| top | average opponent: 1549record: 5-4 | new rating: 1526 | ||
| Grand Prix Los Angeles 2016 (modern) | starting rating: 1514 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 582 | McCallum, Daniel (1564) | Won 2-1 | +191533 |
| 2modern | 306 | Doberne, David (1705) | Lost 0-2 | -151518 |
| 3modern | 721 | Nelson, Joshua (1522) | Won 2-1 | +181536 |
| 4modern | 340 | Gates, Cody (1556) | Won 2-1 | +191555 |
| 5modern | 306 | Stittsworth, Dylan (1637) | Lost 0-2 | -171538 |
| 6modern | 627 | Becker, Brett (1499) | Lost 1-2 | -191519 |
| 7modern | 706 | Nguyen, Patrick (1509) | Lost 1-2 | -181501 |
| 8modern | 668 | Hettrick, Darragh (1484) | Lost 0-2 | -181483 |
| 9modern | 565 | Manzo, Joseph (1460) | Won 2-0 | +181501 |
| top | average opponent: 1549record: 4-5 | new rating: 1501 | ||
| Grand Prix Oakland 2016 (BFZ standard) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 409 | Cheifetz, Rob (1446) | Won 2-0 | +171533 |
| 2standard | 301 | Zhang, Chenyi (1505) | Won 2-1 | +171550 |
| 3standard | 107 | Sun, Qiushi (1742) | Won 2-1 | +221572 |
| 4standard | 36 | Gonzalez, Gabriel (1555) | Draw 1-1 | -11571 |
| 5standard | 115 | Wolbers, Andrew (1467) | Lost 1-2 | -201551 |
| 6standard | 257 | Ferreira, Steven (1533) | Lost 0-2 | -181533 |
| 7standard | 385 | Nelson, Eric (1524) | Lost 1-2 | -181515 |
| 8standard | 485 | Doris, John (1513) | Lost 0-2 | -181497 |
| 9standard | 454 | Haker, Steven (1461) | Won 1-0 | +171514 |
| top | average opponent: 1528record: 4-4-1 | new rating: 1514 | ||
| Grand Prix San Diego 2015 (ORI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 234 | Balderrama, Rene (1462) | Won 2-1 | +171517 |
| 2standard | 21 | Pang, Siteng (1571) | Lost 0-2 | -171500 |
| 3standard | 577 | Ige, Andrew (1421) | Lost 0-2 | -191481 |
| 4standard | 625 | Holmes, Rayan (1482) | Won 2-1 | +181499 |
| 5standard | 386 | Arbe, John (1483) | Lost 1-2 | -181481 |
| 6standard | 517 | Alonzo, Fabian (1480) | Won 2-0 | +181499 |
| 7standard | 323 | Lebrilla, Kevin (1525) | Won 2-0 | +181517 |
| 8standard | 283 | Reed, Grant (1484) | Lost 1-2 | -191498 |
| 9standard | 242 | Toney, Andrew (1471) | Won 2-0 | +181516 |
| top | average opponent: 1487record: 5-4 | new rating: 1516 | ||