| Chen, J | 0 | U | 193989 | Manchester University |
| Chen, Jack | 1436 | M | 311527 | Cornwall Juniors |
| Chen, Jack | 0 | M | 312447 | Cornwall * |
| Chen, Jackie | 0 | M | 259515 | Stonyhurst College |
| Chen, Jackson | 1330 | M | 312302 | Cambridgeshire Junior |
| Chen, Jamie | 0 | M | 331618 | Greater Manchester Juniors |
| Chen, Jason | 0 | M | 323423 | Cornwall * |
| Chen, Jefferson | 0 | M | 358967 | Cambridgeshire * |
| Chen, Jessica | 0 | F | 361963 | Wimbledon |
| Chen, Jessica | 0 | F | 325457 | Cornwall * |
| Chen, Jiafang | 747 | M | 361694 | Camberley Junior Chess Club |
| Chen, Jiahui | 1245 | M | 360317 | Colchester Junior |
| Chen, Jiarui | 0 | U | 327008 | China |
| Chen, Jie | 0 | M | 359427 | London SW * |
| Chen, Jim | 0 | U | 286626 | Bath University |
| Chen, Jimmy Sheng | 0 | M | 259656 | London School of Economics |
| Chen, Jinan | 0 | F | 313880 | Gosforth |
| Chen, Jinfan | 1340 | M | 302984 | Gosforth |
| Chen, Jingham | 0 | U | 320487 | St Johns School Enfield |
| Chen, Jinsheng | 0 | M | 298189 | Queens College CU |
| Chen, Jinyang | 0 | M | 361281 | Kent * |
| Chen, Jonathan | 0 | U | 321803 | United States |
| Chen, Jonny | 1227 | M | 353078 | Hereford Cathedral School |
| Chen, Joy | 0 | F | 325842 | Hampton * |
| Chen, Joyce | 0 | M | 289609 | Middlesex Juniors |
| Chen, Jun Xuan | 0 | M | 362973 | Queen Marys GS Walsall |
| Chen, Junyi | 1410 | M | 322371 | Barnet Knights |
| Chen, Justin | 0 | M | 326649 | Liverpool |
