Sudoku Guide

   How to Use the Board

• Tap or click any empty cell, then select a number from the pad below the puzzle to add it.

• Double-tap or double-click any empty cell, or a cell you filled to insert a hint.

• Made a mistake? Select the cell and choose one of the options:

  • Tap the red ❌ button to delete the number.

  • Tap a new number from the pad to replace it.

  • Double-tap or double-click the cell again to insert a hint.

• ⏸️ Pause the game by tapping (or clicking) the timer.

• ▶️ Resume the game by tapping (or clicking) any cell.

• 🔈 Tap (or click) the speaker icon to turn sound on or off.

• 🟦 Check (or uncheck) the box “Warn for mistakes” to show (or hide) alerts when there are five or more incorrect cells.

• On mobile, tap the double-arrow button ⏩ to open the same options menu that’s always visible in the desktop layout.

   💻 Extra Tips for Desktop Users

• Press [ F11 ] to enter full-screen mode.
• You can also use the numeric keypad (keys 1–9 and the Delete key). Select an empty cell using the mouse or touchpad, then press a key.

   Sudoku Rules

• Fill all rows, columns, and 3×3 squares

• Use numbers 1 to 9, no repeats in: each row, each column, each 3×3 block

• Use logic — no guessing needed!

• Some numbers are already placed to help you start.

   Tips:

• Start with rows, columns, or blocks that have the most numbers filled in.

• Use the process of elimination to narrow down the possibilities for each cell.

• If you’re stuck, use a hint to reveal the correct number for a specific cell.