Chang, Jeffrey
Current rating: 1502
Record: 7-8
| Regional Championships Atlanta 2023 (pioneer) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 297 | Slone, Ryan (1564) | Lost 1-2 | -171484 |
| 2pioneer | 634 | Donnan, Blake (1636) | Lost 0-2 | -151469 |
| 3pioneer | 595 | Sallie, Jeremy (1484) | Won 2-0 | +181487 |
| 4pioneer | 529 | Stark, Ben S (1744) | Won 2-0 | +231510 |
| 5pioneer | 347 | Miles, Adam (1657) | Won 2-1 | +211531 |
| 6pioneer | 131 | Hayden, Maxwell (1884) | Lost 1-2 | -121519 |
| 7pioneer | 353 | Dunn, Ethan (1594) | Lost 1-2 | -171502 |
| average opponent: 1652record: 3-4 | new rating: 1502 | |||
| Grand Prix Toronto 2017 (HOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 98 | Lai, Andrew (1515) | Lost 1-2 | -181482 |
| 2sealed | 485 | Ng, Albert (1375) | Won 2-0 | +161498 |
| 3sealed | 121 | Castillo, Zaryn (1672) | Won 2-0 | +211519 |
| 4sealed | 210 | Yip, Matthew (1454) | Won 2-1 | +171536 |
| 5sealed | 161 | Rasmussen, Tanner (1542) | Lost 1-2 | -181518 |
| 6sealed | 260 | Keen, Evan (1519) | Lost 1-2 | -181500 |
| 7sealed | 397 | Newell, Lauren (1587) | Won 2-1 | +201520 |
| 8sealed | 320 | Baxter, Blair (1478) | Lost 0-2 | -191501 |
| average opponent: 1518record: 4-4 | new rating: 1501 | |||