A Sudoku online game is the perfect way to pass time. It is a great way to challenge your logical thinking. It is also a great way to exercise your brain. Here is an overview of three Sudoku online games.Sudoku SavantSudoku Savant is an excellent Sudoku online game. It was designed by Sapphire Software, Inc. The interface is the best one I have ever seen for an online game or for a PC or MacIntosh version for that matter.It will automatically pencil in candidates for you at your option. Clicking a candidate will toggle the candidate. Double clicking a candidate will solve the cell. There is no need to even touch your keyboard.Need a hint? The game also will provide you with four levels of hints. You can even click a button to solve the hint for you if you are stuck.Sudoku Savant provides four levels of puzzles daily. Easy, medium, hard, and expert. Like a challenge? You will have plenty at the expert level. Expect to find hard Sudoku puzzles exhibiting x-wing, swordfish, and xy-wing patterns.Another benefit you will find playing Sudoku Savant, is this game will save your incomplete game. If, for any reason you click to another page and then return to the game, your solved cells remain as you left them. Nice!Ready to play Sudoku? Search Google on the term “sudoku savant” and you will find this fun Sudoku online game.Web SudokuWeb Sudoku is another Sudoku online game. Unlike, Sudoku Savant, it doesn’t offer you the option of placing candidates automatically or manually. This is fine for simple games and for experts who love to solve Sudoku the hard way.Web Sudoku, in comparison, requires you to click on the cell you want to solve and then enter the number by typing it on your keyboard.If you leave the puzzle, and then return, Web Sudoku does not save your work. Bummer!For those who like a variation of the traditional 9×9 Sudoku puzzle, Web Sudoku offers Squiggly Sudoku online and a link to Jig SawDoku, a drag and drop 9×9 Sudoku puzzle.USA Today SudokuUSA Today Sudoku is another Sudoku online game. This game will display candidates for each cell if you desire. Clicking a naked single candidate does nothing. You have to type the number or click the cell and drag the desired number from the list.Another disadvantage of this online game is you cannot manually eliminate candidates except by solving a cell. This is a huge disadvantage. The ability to remove candidates is a tool you want to help you solve Sudoku puzzles, especially hard ones.A Sudoku online game is the perfect way to pass time. It is a great way to challenge your logical thinking. But, why not enjoy solving Sudoku puzzles with the online game that offers you the best features. I choose Sudoku Savant. Try it and decide for yourself which one you like best.All game names are property of their respective owners.