Friday, July 29, 2016

Backtracking — SUDOKU Solver

The objec­tive is to fill a 9×9 grid with dig­its so that each col­umn, each row, and each of the nine 3×3 sub-grids that com­pose the grid (also called “boxes”, “blocks”, “regions”, or “sub-squares”) con­tains all of the dig­its from 1 to 9. The puz­zle set­ter pro­vides a par­tially com­pleted grid, which for a well-posed puz­zle has a unique solu­tion. (Source: Wiki —

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