Residuel is played on a rather egg-shaped arrangement of rhombuses. Players take turns placing a piece of their color that covers three mutually adjacent rhombuses. When there are no moves left, the player with the higher score is the winner. The general idea behind the scoring is simple: You get 1 point per empty cell that is orthogonally adjacent to more of your pieces than your opponent's pieces. Two measures are taken to exclude all draws in as fair a manner as possible: 1: You get an extra point every time you make a placement that closes off an odd number of tied cells. (A cell is closed off when it is adjacent to no cell that can be occupied on a future turn.) This is equivalent to dividing tied cells between you in a "one for me, one for you, one for me"-fashion as they are closed off. 2: You get an extra point if your opponent has made more placements than you at the end of the game.