BOT
Chess Bot
CM
Candidate Master
CTD
Clock Time Delay
ELO
ELO rating system
FIDE
Fédération Internationale des Échecs
FM
FIDE Master
GM
Grandmaster
ICF
International Chess Federation
IM
International Master
IMSA
International Mind Sports Association
MSO
Mind Sports Organisation
PGN
Portable Game Notation
RCF
Russian Chess Federation
TCEC
Top Chess Engine Championship