• Use arrow keys or WASD to navigate
• Type 1-9 to input numbers
• Press Delete or Backspace to clear
Rules:
• Fill each row with numbers 1-9
• Fill each column with numbers 1-9
• Fill each 3×3 box with numbers 1-9
• No duplicates in any row, column, or box
Features:
• Notes mode: Add small notes in cells
• Error highlighting shows conflicts
💡 Use notes mode to keep track of possibilities!