Choi, Joseph
Current rating: 1459
Record: 19-24
| Grand Prix Hong Kong 2017 (XLN limited) | starting rating: 1415 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 16 | Ng, Hon Chiu (1500) | Won 2-0 | +201435 |
| 2sealed | 11 | Furuuchi, Kaoru (1584) | Won 2-1 | +211456 |
| 3sealed | 83 | Tada, Mitsuhiro (1680) | Lost 0-2 | -141442 |
| 4sealed | 144 | McKay, Brian (1571) | Lost 1-2 | -161426 |
| 5sealed | 261 | Liu, Xiyuan (1657) | Lost 1-2 | -141412 |
| 6sealed | 240 | Cheng, Wei Ting (1638) | Won 2-1 | +221434 |
| 7sealed | 191 | Niederer, Roberto (1520) | Lost 1-2 | -161418 |
| 8sealed | 246 | Watanabe, Yuta (1647) | Won 2-1 | +221440 |
| 9sealed | 186 | Chan, Dicky (1477) | Won 2-1 | +191459 |
| top | average opponent: 1586record: 5-4 | new rating: 1459 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 173 | Nishitani, Yu 6122 (1500) | Lost 0-2 | -171416 |
| 2modern | 809 | Sakurai, Tomoya (1231) | Won 2-1 | +151431 |
| 3modern | 698 | Hayakawa, Yohei (1529) | Won 2-1 | +201451 |
| 4modern | 379 | Tokeshi, Hiroki (1450) | Lost 1-2 | -181433 |
| 5modern | 1048 | Mori, Mizuki (1484) | Lost 0-2 | -171416 |
| 6modern | 1079 | Yamasaki, Sadaharu (1270) | Lost 0-2 | -211395 |
| 7modern | 1039 | Murakami, Yuuki 5742 (1466) | Won 2-1 | +191414 |
| 8modern | 878 | Lu, Shaoan (1379) | Won 2-1 | +181432 |
| 9modern | 610 | Shigemura, Yuji (1525) | Lost 1-2 | -171415 |
| top | average opponent: 1426record: 4-5 | new rating: 1415 | ||
| Grand Prix Guangzhou 2016 (modern) | starting rating: 1435 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 122 | Wang, Gang (1512) | Lost 1-2 | -171418 |
| 2modern | 119 | Li, Yuanjun (1612) | Lost 1-2 | -141404 |
| 3modern | 253 | Wang, Xiaoliang (1463) | Lost 0-2 | -171387 |
| 4modern | 267 | Chu, Louis (1397) | Won 2-0 | +181405 |
| 5modern | 223 | Liang, Ce (1465) | Won 2-0 | +191424 |
| 6modern | 204 | Kusakabe, Kyohei (1806) | Lost 1-2 | -111413 |
| 7modern | 219 | Li, Haofeng (1466) | Lost 1-2 | -171396 |
| 8modern | 201 | Wang, Shensheng (1444) | Won 2-1 | +191415 |
| 9modern | 173 | Wang, Yitao (1449) | Won 2-0 | +181433 |
| top | average opponent: 1513record: 4-5 | new rating: 1433 | ||
| Grand Prix Taipei 2016 (SOI standard) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 150 | Tomikawa, Akihisa (1586) | Won 2-0 | +201509 |
| 2standard | 71 | Huang, Tsai-Wei (1577) | Lost 1-2 | -171492 |
| 3standard | 289 | Tseng, Yuchun (1502) | Lost 0-2 | -181474 |
| 4standard | 326 | Yang, Shao-fu (1403) | Lost 0-2 | -191455 |
| 5standard | 320 | Huang, Yiwen (1466) | Lost 0-2 | -181437 |
| 6standard | 328 | Hsu, Chris (1452) | Lost 0-2 | -181419 |
| 7standard | 321 | Jan, Mark (1285) | Won 2-0 | +161435 |
| top | average opponent: 1467record: 2-5 | new rating: 1435 | ||
| Grand Prix Hong Kong 2015 (ORI limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 223 | Ko, Ronald (1518) | Won 2-1 | +181518 |
| 2sealed | 148 | Barabona, Herbert (1626) | Lost 1-2 | -161502 |
| 3sealed | 300 | Reyes, Sinamar (1499) | Won 2-1 | +181520 |
| 4sealed | 119 | Lam, Joe (1688) | Lost 0-2 | -151505 |
| 5sealed | 208 | Yu, Tsz Hang (1600) | Lost 1-2 | -161489 |
| 6sealed | 327 | Ford, Kyle (1434) | Won 2-0 | +171506 |
| 7sealed | 209 | Ng, Chi Fai (1580) | Won 2-0 | +191525 |
| 8sealed | 40 | Jiang, Yida (1502) | Lost 1-2 | -181507 |
| 9sealed | 186 | Yang, Manxiu (1503) | Lost 0-2 | -181489 |
| top | average opponent: 1550record: 4-5 | new rating: 1489 | ||