https://image.lichess1.org/display?h=550&op=thumbnail&path=njswift:ublog:daAzbQ FIDE contra USCF njswift3 Mar 2022712,255 views Chess Over the board Tournament Adventures in the rules of chess It might be surprising to learn how many differences exist between the official FIDE rules and those of the US Chess Federation. Many of these are fairly minor and most of them cover details of the behavior of players and arbiters during competitions, but in some cases they involve more substantial issues, such as when a move begins and ends or what constitutes insufficient material. Ken Ballou compiled a summary of these differences. The role of the arbiter Many of the differences involve the arbiter's role in enforcing the rules. The general difference seems to be that FIDE expects the arbiter to intervene in game play, while in many cases the USCF puts the onus on players to call for intervention. We can see this difference clearly in situations that involve flagging and illegal moves. Flag
