数独

Sudoku is a 9x9 grid game where players must fill in the numbers 1-9 without repeating them in each row, column, and 3x3 3x3 grid. The system randomly generates puzzles with missing numbers and supports features such as selecting and filling in missing numbers, error messages, and resetting. It uses logic to solve puzzles, has simple rules, and offers both casual and intellectually stimulating benefits.