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Microsoft excel sudoku solver3/9/2024 ![]() ![]() Then puzzle is solved and numbers are randomly removed from the puzzle while there is still a unique solution. These blocks are independent and therefore can be filled randomly. the Fisher-Yates shuffle) is used to fill diagonal 3 x 3 blocks (as shown in Figure below). Puzzle generation is a little more interesting. There are much better algorithms out there, therefore it is not listed here (search code for for more details). The algorithm used for solving Sudoku puzzle, is simple recursion. Int sudoku = acq_sudoku_convertgrid(grid, size) ĪCQ.(sudoku, solutions, max_count) Public static int acq_sudoku_solution_count(object grid) Since we don't want Excel to show zeros, we convert int array to array of objects and replace zeros with empty strings. Elements equal to zero in this array represent empty Sudoku cells. We call it from Excel wrapper function by first checking the seed argument. The function stops counting solutions after 1024 are found. Normally, there should be only one solution, but if you manually remove digits from the puzzle, number of possible solutions goes up. ![]()
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