DKM Sudoku Multi is a multi-user challenge where you solve the same puzzle with up to four other players simultaneously. The first person to solve the puzzle wins the game. While you are solving, you can watch what cells the other players solve (not the actual value).
When solving the puzzle, all the solve aids (including checking your input) will not be available. You will not be informed of any errors (same as the daily challenge).
(Game will open in new window which you can resize or make full screen.)