Johnson, Isaac
Current rating: 1566
Record: 8-5
| Grand Prix Pittsburgh 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 48 | Williams, Keith (1535) | Won 2-0 | +191519 |
| 2sealed | 162 | Lark, Tyler (1518) | Won 2-1 | +181537 |
| 3sealed | 72 | Nielson, Steven (1500) | Won 2-1 | +171554 |
| 4sealed | 5 | Thoune, RJ (1542) | Lost 0-2 | -181536 |
| 5sealed | 274 | Mack, Shaun (1547) | Lost 1-2 | -181518 |
| 6sealed | 355 | Shay, Rich (1752) | Won 2-0 | +221540 |
| 7sealed | 207 | Garosshen, Kevin (1662) | Won 2-0 | +201560 |
| 8sealed | 165 | Li, Fabien (1752) | Won 2-1 | +221582 |
| 9sealed | 111 | Kofsky, Robert (1667) | Won 2-1 | +191601 |
| 10sealed | 377 | King, Matthew (1471) | Lost 0-2 | -201581 |
| 12draft | 6 | Newberg, Matthew (1602) | Lost 0-2 | -181563 |
| 13draft | 85 | Detwiler, Jared (1565) | Won 2-0 | +181581 |
| 14draft | 4 | Evans, Eli (1702) | Lost 0-2 | -151566 |
| average opponent: 1601record: 8-5 | new rating: 1566 | |||