Sudokuruudukot

Sudokuruudukot, commonly known as Sudoku, is a popular logic-based number puzzle game that originated in the United States but gained widespread popularity in Japan. The name "Sudoku" is derived from the Japanese phrase *suji wa dokushin ni kagiru*, meaning "the digits must remain single," reflecting the core rule of the game.

The game is played on a 9×9 grid divided into nine 3×3 subgrids. Some of the grid’s squares contain pre-filled numbers ranging from 1 to 9, while the rest are empty. The objective is to fill the empty squares with digits so that every row, column, and 3×3 subgrid contains all digits from 1 to 9 without repetition. The puzzle is solved through logical deduction rather than guesswork, making it accessible to players of all ages.

Sudokuruudukot puzzles vary in difficulty, from very easy to extremely challenging, often categorized by the number of pre-filled numbers. Beginners typically start with easier puzzles, while experienced solvers may attempt advanced or "killer Sudoku" variants, which incorporate additional constraints or arithmetic operations.

The game’s simplicity and addictive nature have contributed to its global appeal, leading to its inclusion in newspapers, mobile apps, and dedicated puzzle books. Sudoku is also recognized for its cognitive benefits, including improved problem-solving skills, concentration, and memory retention. Its minimalist design and universal accessibility have made it a staple in recreational mathematics and a favorite pastime worldwide.