To play a game, there is a certain amount of non-fun work that must be done. Players must perform both physical tasks, like shuffling cards, and mental tasks, like arithmetic. The goal of ergonomics is to restructure gameplay to minimize the amount of upkeep players need to perform.
Square grids are perhaps the most iconic type of board in board games, due to classics like chess. While hex grids are a more recent innovation, the success of Catan has made them
Effort in games should be balanced by reward. When players perform work for no reward, the game seems long, tedious, and not worth the setup. Rolling dice is work, and rolling attack dice