Sologammon is a version of backgammon that is played as a solo game against the computer.
The game starts by clicking on the fish on the left edge of the screen. The computer opponent rolls the dice automatically. When it's your turn, click on the dice in the top left. Otherwise the game runs analogously to Multiuser Backgammon.
The rating is depending on the number and position of the loser's checkers remaining in the game.