Sudoku

Rules

• Fill the 9x9 grid with numbers 1-9
• Each row must contain all digits from 1 to 9 without repetition
• Each column must contain all digits from 1 to 9 without repetition
• Each 3x3 box must contain all digits from 1 to 9 without repetition

Controls

• Click a cell to select it (or use arrow keys to navigate)
• Click a number or press 1-9 on your keyboard to fill the cell
• Click the eraser or press 0/Backspace/Delete to clear a cell
• New Game generates a new puzzle at the selected difficulty
• Check Solution highlights errors in your current attempt
• Show Solution reveals the complete solution

Difficulty Levels

• Easy: 40-45 numbers pre-filled
• Medium: 30-35 numbers pre-filled
• Hard: 25-28 numbers pre-filled