Tool to solve sudoku/wordoku grids (directly or step by step). Sudoku is a game whose purpose is to fill a 9x9 grid with digits (or letters, or symbols) in order to get only one per line, column and block. A bloc is a delimited portion of the grid, by defaut sub-grid 3x3.

Sudoku Solver - dCode

Tag(s) : Number Game, Solver

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Tool to solve sudoku/wordoku grids (directly or step by step). Sudoku is a game whose purpose is to fill a 9x9 grid with digits (or letters, or symbols) in order to get only one per line, column and block. A bloc is a delimited portion of the grid, by defaut sub-grid 3x3.

Make a copy/paste or type directly in cells. Letters (Wordoku) and digits are accepted.

Example: Copy the Sudoku content in the first cell (top left) `97 1 5 5 9 2 18 4 8 7 26 92 3 6 2 9 19 457 `

to get :

9 | 7 | 1 | 5 | |||||

5 | 9 | 2 | 1 | |||||

8 | 4 | |||||||

8 | ||||||||

7 | ||||||||

2 | 6 | 9 | ||||||

2 | 3 | 6 | ||||||

2 | 9 | |||||||

1 | 9 | 4 | 5 | 7 |

Software solves the Sudoku just like an human and display each step of its progress to understand.

Sometimes the reasoning stops at a step where no logical deduction can deduce at 100% the value of a box (several possible values). The solver performs a random pick among these possible values and continues, if an inconsistency occurs (the sudoku turns to have no solution) then it goes back to the step of the random pick and choose another value.

If the program indicates that there is only one possible value, it means that no other value is acceptable in the box.

dCode calculates all the solutions for the sudoku, not just the first one. To check a homemade sudoku, the solver can confirm that there is only one solution.

The first Sudoku versions are from 1979

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Source : http://www.dcode.fr/sudoku-solver

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