| A sudoku puzzle consist in a square matrix with 9 rows and 9 columns to be filled with the digits 1 to 9 in such a way that each one appears only once in a row or a column and in any of the nine (3 x 3) regions. The aim of this implementation is mainly to serve as playground for anybody wanting to improve his skills in solving this kind of puzzle. In setup mode you can fill the cells with a given sudoku puzzle by simply clicking on the corresponding digit in the cell. You can undo a set digit by clicking on it. Once you have setup the sudoku you switch to one of the three play modes. By the way you can also chose one of the preset puzzles from the dropdown list for a start. In standard mode no assistance is available, you just can continue filling in the grid cells.
| | In show candidate mode each grid cell allows you to select only digits that fulfill the rule. Last the play hint mode will suggest you the next move by highlighting a digit in one of the settable grid cells. Do not expect a hint to be provided in any circumstance because this would have lead to an excessive resource drain on the browser. You can switch freely between the play modes but beware if you switch to setup mode the current game will be lost. If you want to use it as a training ground try to solve your chosen puzzle in candidate mode. When you get lost you still can switch to hint mode to see what could be the next move. Try to find out what logic justifies the move.
Well that's all, enjoy now!
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