Backgammon may be known as the game of kings, but unfortunately not all backgammon players display an aristocratic sense of chivalry at the table. Gambling seldom improves manners, while online backgammon players rarely know the basic traditions of real-world table play. For these reasons and more, a short lesson in backgammon etiquette seems appropriate.
Talking and Rolling
It's best to avoid speaking while an opponent is considering a play. Some wily players will engage in "coffeehouse," the term for chatter meant to trick a player into making a move he or she might not have made. Coffeehouse is frowned upon by backgammon etiquette. If your opponent tries to influence your move, ignore them.
The use of backgammon dice cups is expected to ensure fair rolling. Dice should be rolled onto the backgammon table on the half of the board to the rolling player's right. Dice must land flat and flush to be counted. If a dice lands on a checker or outside the board it must be re-rolled.
Some backgammon players cheat and others make mistakes. Illegal moves do occur, and there are backgammon etiquette rules to deal with them. It is highly recommended that both players remain attentive to the luxury backgammon board at all times to avoid illegal plays, be they intentional or accidental. An illegal play does not stand so long as the other player spots it before they next roll the dice. Remember that if one checker is used to play both dice, each move must be permitted and not merely the aggregate, i.e. a rolled 6 and 4 equaling 10.