Middoku is the well known game of Sudoku (or Su Doku) for your mobile phone. It's available now for most modern devices and it's free .
The name Middoku is a contraction of the words MIDlet, which is the technical name for a piece of software such as this and Sudoku, the original name of the game.
They are quite simple, but depending on the difficulty setting, solving the puzzle can be rather tricky. The object of this game is to fill the squares with numbers from 1 to 9. Within each 3 x 3 block, each number may appear only once. The same is true for every row and for every column. The puzzle is solved when all squares are filled in, while the unique number rule is obeyed. When you start a new game, a selection of squares is already filled in.
There are two modes in which to enter the numbers: Fine and Coarse. In Fine mode, the arrow keys let you position the cursor. Press any number key to enter a value in the selected square. If the Allow Mistakes setting is set to No, you will not be able to enter an invalid value for that square. A move is invalid if the number you're trying to enter already occurs in either that 3 x 3 block, that column or that row. 0 clears the square. In Coarse mode, the number keys first select the 3 x 3 block, then they select the square, and they finally enter the number. The Fire key (usually a key positioned in the middle of a directional pad, or the 5 key) lets you switch from Fine to Coarse mode temporarily (for one move). The # key switches to and from Tag mode. When Tag mode is active, you can place up to 9 markers in each square. This allows you to tag a square for two or more possible values.
There are two aides in case you get stuck. From the Special menu (and by pressing the * key) you can choose Show Hint. The game will attempt to fill in one square. Note that this features only works for easy puzzles. If no square is filled, then the program could not help you. The other help you can get is also from the Special menu: Show all Tags. This will fill in the tags of all free squares.
It's also possible to play with a 3 x 2 block size using numbers 1 to 6. These puzzles are generally less difficult, and they can definitely be played faster. There are 1000 puzzles incorporated into the game. That's 50 for each level (for both 9 and 6 block variations).
Difficulty Level. A value from 1 (easy) to 5 (tough). A best effort is done to assure that the puzzle presented is indeed of the requested level. Occasionally, you might be surprised. Board Type. Either 3 x 3 (standard) or 3 x 2. 3 x 2 puzzles will take less time to finish. Allow Mistakes. When this is set to No, the program will prohibit moves that break the uniqueness rule. Selection Mode. You may choose Fine or Coarse. On mobile devices that don't have a directional pad, you could use Coarse. During play, you can switch from Fine to Course (and vice versa) by pressing the fire button. Tile Type. There are two types to choose from, Gray and Color. Choose the type that displays best on yout device. Sound Level. A value between 0 and 5. 5 is loudest, 0 is no sound at all.
Options while playing
The Special menu provides the following options. Reset this Puzzle. The puzzle is reset to its initial starting state. New Puzzle. A new puzzle is started. The new puzzle is of the same difficulty level. Show Hint. The program does a best effort to fill in one square for you. The algorythm that does this is far from intelligent. It only works on easy puzzles and is meant for beginners. Show All Tags. All possible numbers are filled in in all empty squards. Please note that the program uses the current situation to make its decisions. If you've made a mistake, the results from this mechanism are likely to be mistaken as well.
Quiting the game
This can be done (while playing) by going to the Quit menu. From here you have several options. You could choose to Save and Quit, or Return to the Menu. The latter abandons the running game. The former will allow you to continue the game the next time you run Middoku.
A comprehensive guide how to solve a Sudoku puzzle can be found on How Stuff Works.
There two ways to do it: Over the Air or by connecting your phone to a computer. When choosing the first method, you have to make sure that your phone is set up correctly for mobile internet. Your WAP/GPRS settings need to be correct (consult your service provider). If they are, you can surf to http://mobile.vangilz.com and select the game from the menu. Your operator will charge you a fee for the amount of bytes transferred. After you've chosen the link, you'll know how many bytes are about to come your way before they actually come. When using the computer connection method, please go to the download section of this site, and download the appropriate JAR file. Consult your phone manufacturer's instructions on how to transfer the file.
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