Chadbourne, Jay H
Current rating: 1441
| Grand Prix Miami 2013 (DGM standard) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 61 | Sprick, Ryan (1511) | Lost 1-2 | -171432 |
| 4standard | 198 | Tanner, Adam (1543) | Won 2-0 | +201452 |
| 5standard | 217 | Leon, Nick (1539) | Won 2-1 | +191471 |
| 6standard | 130 | Arnot, Jeff (1556) | Lost 0-2 | -161455 |
| 7standard | 157 | Cole, William (1535) | Lost 0-2 | -171438 |
| 8standard | 235 | Roberts, William R (1516) | Lost 1-2 | -161422 |
| 9standard | 225 | Hasselman, Rob (1499) | Won 2-0 | +191441 |
| top | average opponent: 1529record: 3-4 | new rating: 1441 | ||
| Grand Prix Atlantic City 2013 (RTR standard) | starting rating: 1490 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 206 | Hinkle, Charles (1759) | Won 2-1 | +231513 |
| 4standard | 113 | Arends, Randolph (1720) | Lost 1-2 | -141499 |
| 5standard | 231 | Parent, Justin (1661) | Lost 0-2 | -151484 |
| 6standard | 415 | Cody, Joey (1520) | Lost 0-2 | -181466 |
| 7standard | 384 | Rose, Phil (1479) | Lost 1-2 | -171449 |
| top | average opponent: 1628record: 1-4 | new rating: 1449 | ||
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 102 | Polschak, Yehor (1611) | Lost 0-2 | -161484 |
| 4sealed | 567 | Lindo, David (1604) | Lost 0-2 | -161468 |
| 5sealed | 486 | Brady, Jennifer (1356) | Won 2-1 | +161484 |
| 6sealed | 445 | Baldwin, Kevin A (1506) | Won 2-0 | +191503 |
| 7sealed | 201 | Ferrando, Matthew (1822) | Lost 1-2 | -131490 |
| top | average opponent: 1580record: 2-3 | new rating: 1490 | ||