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monster sudoku online Sudoku competitions are held globally, where speed solvers compete to finish complex grids in the shortest time possible. smarter sudoku Advanced Sudoku solving methods involve complex patterns like X-Wing, Swordfish, and XY-Wing. These techniques are often required for hard and expert level puzzles. smarter sudoku To solve a Sudoku puzzle, one must look for cells where only one number is possible, or rows/columns/blocks where a specific number has only one possible placement.

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