Killer is a sudoku variant in which, instead of some of the numbers of the solution, you have a different kind of initial clue:
Killer Sudoku game
Killer Sudoku game
Go ahead and play this form of online sudoku, trying to solve them as quick as you can.
Whenever you play a rated solitaire game in Ludoteka, you are competing against other players. Up to 25 different players will play the same game, during a maximum period of two days. For more information see the solitaire games.