Example for a solved Fudoku
Fill balls into the empty squares so that there are exactly 3 balls in each row, 1 ball in each column, and no ball touches another. Some balls are already placed. There's only one solution.
Set a ball by clicking into an empty square.
Remove a mistaken ball by clicking on it.
By the way, the hands are goalkeeper gloves.
Select one of three levels of difficulty.
Login to keep score (check "Ich bin neu hier" at your first login).
"START" will start a new game, "LÍSUNG" means solution.
Alles klar? Then good luck!