How to Play Sinoku
Just like classic Sudoku. Place the characters on the grid. Each row, column and 3x3 block must contain each character once. No repeats allowed.
In the mobile version, touch a blank square then touch one of the characters to place it there.
In the desktop version of the game, click a square to select it, then press a number key to enter a character or 0 to delete.
You can save single games in the browser, and load later, as long as you haven't erased your history. It's a good idea to 'check' before you save as all answers will be fixed when you re-load the board.