| Abbreviation | Definition |
|---|---|
| BC | Basketball And Chess |
| BCCA | Board for Certification in Clinical Anaplastology |
| BCCA | British Correspondence Chess Association |
| BCF | Boylston Chess Foundation |
| BCF | British Chess Federation |
| BCS | Berkeley Chess School, Berkeley, California |
| BCVS | British Chess Variants Society |
| BDCA | Bradford District Chess Association |
| BF | Bobby Fischer |
| BK | Black Knight |
| BKCL | Baltimore Kids Chess League |
| BKI | Black King |
| BKN | Black Knight |
| BNASC | Bloomington Normal Area Scholastic Chess |
| BPN | Black Pawn |
| BQU | Black QUeen |
| BRK | Black Rook |
| BS | Boris Spassky |
| BUCA | British Universities Chess Association |
| BXB | Bishop Takes Bishop ( Chess) |