Sudoku

Work through 100 classic Sudoku puzzles, ranging in difficulty from Easy to Master. Draw freely on the board to visualize your reasoning as you solve. No ads or in-app purchases.

Key Features:

• Color cells and possible numbers, and draw lines between them to keep track of your reasoning right on the board
• Find a challenge that suits you with difficulty ratings based on solving techniques. Built-in puzzles, puzzles you enter, and randomly generated puzzles all use the same standard
• Have the game generate more puzzles at your chosen difficulty, with six levels from Easy to Grandmaster
• Progress saves automatically, so you can take a break and pick up where you left off
• Play entirely offline — no internet connection required
• Use small numbers to mark what could go in each cell, or choose to have the game list them at the start or remove ruled-out possibilities as you fill in numbers
• Highlight matching numbers across the board to make them easier to find and compare
• Turn on optional warnings to spot repeated numbers in the same row, column, or 3×3 box
• Undo a mistaken action, or restore an action you just undid
• If you're unsure about a number you've entered, check whether it's correct, up to five times per puzzle
• Play with mouse or keyboard, whichever feels more comfortable
• Bring Sudoku puzzles you've found into the game by entering them by hand or pasting their text
• Keep puzzles in your own groups, give them names and descriptions, and arrange them however you like
• Write down your thoughts on each puzzle, and see your fastest time and how many times you've solved it
• Copy a puzzle, or your current numbers and pencil marks, as text to send to others for discussion