Walters, William K
Current rating: 1483
Record: 13-15
| Grand Prix Charlotte 2015 (modern) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 224 | Azpurua-Borras, Santiago (1542) | Won 2-1 | +201470 |
| 4modern | 236 | King, Byron (1562) | Lost 1-2 | -161454 |
| 5modern | 349 | W, Addi (1578) | Won 2-0 | +201474 |
| 6modern | 277 | Barkon, Daniel (1565) | Lost 0-2 | -161458 |
| 7modern | 281 | Luu, Kevin (1551) | Won 2-0 | +191477 |
| 8modern | 326 | Kovasckitz, Aaron (1537) | Won 2-0 | +191496 |
| 9modern | 265 | Phillips, Bert (1734) | Lost 1-2 | -131483 |
| top | average opponent: 1581record: 4-3 | new rating: 1483 | ||
| Grand Prix Orlando 2014 (KTK limited) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 512 | Pham, Nhi (1585) | Lost 0-2 | -161468 |
| 3sealed | 280 | Hayes, Avery (1498) | Won 2-0 | +191487 |
| 4sealed | 185 | Schoepfer, Andrew (1509) | Lost 0-0 | -181469 |
| 5sealed | 251 | Woo, Kenneth (1429) | Lost 0-2 | -191450 |
| top | average opponent: 1505record: 1-3 | new rating: 1450 | ||
| Grand Prix Washington DC 2013 (legacy) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 102 | Carroll, Franklin (1518) | Lost 0-2 | -181499 |
| 3legacy | 566 | Vaneman, Robert (1569) | Lost 0-2 | -171482 |
| 4legacy | 744 | Braddock, Matt (1502) | Won 2-0 | +181500 |
| 5legacy | 441 | Adams, Jesse (1612) | Lost 1-2 | -161484 |
| top | average opponent: 1550record: 1-3 | new rating: 1484 | ||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 86 | Rix, Justin (1518) | Lost 0-2 | -191537 |
| 3sealed | 447 | Russell, Jeremiah (1500) | Lost 1-2 | -181519 |
| 4sealed | 488 | McBratney, Rose (1483) | Won 2-0 | +171536 |
| 5sealed | 410 | Day, Christopher (1469) | Lost 1-2 | -191517 |
| top | average opponent: 1492record: 1-3 | new rating: 1517 | ||
| Grand Prix Charleston 2012 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 63 | Morton, Shannon (1500) | Won 0-0 | +181518 |
| 2standard | 34 | Nybo, Conrad (1518) | Won 2-0 | +181536 |
| 3standard | 73 | Pal, Carlos (1716) | Lost 1-2 | -151521 |
| 4standard | 198 | Reed, James (1520) | Lost 0-2 | -181503 |
| 5standard | 205 | Orlikoff, Russell (1483) | Won 2-1 | +181521 |
| 6standard | 158 | Winesburg, Kati (1466) | Won 2-1 | +171538 |
| 7standard | 124 | Mayer, Krieg (1544) | Lost 0-2 | -181520 |
| 8standard | 128 | Kersey, Jacob (1520) | Won 2-1 | +181538 |
| 9standard | 80 | Weihrauch, Jacob (1541) | Won 2-0 | +181556 |
| top | average opponent: 1534record: 6-3 | new rating: 1556 | ||