We fill in all the cells with numbers-candidates. Any cells that are reduced to one possible candidate are solved. Unknown squares are filled with candidates - possible solutions.

Click on Take Step to step through the solution. You can also pick examples from the list above. And then proceed by elimination, paying attention on how numbers-candidates stand in adjacent small squares. Use the 'Import a Sudoku' button or type in a Sudoku puzzle in the small board. In such a situation go to other small squares until you enter all numbers-candidates in each of them. We enter 2:Īnd we get a completely filled small square.Ībove, we considered the ideal case when each time we had a single number-candidate, but in more complex layouts there may be cases when there will not be a single number-candidate in any cell. In this case, we enter the number 4:Īgain, we have a single number-candidate. It can be entered as a solution:Īfter we entered 7, it is removed from other cells and thus new options may open when there is only one number-candidate.

GitHub - Craiting/sudokusolver: A python sudoku solver which can solve 4x4, 9x9, and 16x16 size sudoku solvers. We see here that in one cell there is a single number-candidate. A python sudoku solver which can solve 4x4, 9x9, and 16x16 size sudoku solvers. Using the note mode, enter the numbers-candidates in each empty cell, analysing which numbers may or may not be there, taking into account the rules that we discussed above. The number can occur only once in each small square 3×3Ĭhoose a small square in which as many numbers as possible are initially open. The number can appear only once in each column The number can appear only once in each line The goal of the game is to fill the empty cells with numbers from 1 to 9 so in each row, in each column and in each small 3 × 3 square, every number appears only once.Īt the beginning of the game, some of the cells are already filledīefore adding a number in a cell, check it according to the following rules: The playing field is a 9x9 square, divided into smaller squares with a side of 3 cells. Regular Sudoku gaming improve memory, mental clarity and slow the aging of brain cells. The difficulty of Sudoku depends on the number of initially filled cells and on the methods that need to be used to solve it. To solve it, you will need to concentrate, as well as use logical thinking. Sudoku is a logic puzzle game with numbers.

Sudoku 9x9 resolvidos