Learn how the app works
Read about the coach, practice tools, puzzle guarantee, screenshot import, offline access, and the decisions behind Sudoku Pilot.
Learn and practice Sudoku
Get Help With the Next Sudoku Move
Open the coach when you get stuck. Sudoku Pilot finds the logical moves available on the current board and shows the evidence for each one.
Step-by-step hintsSudoku Hints That Explain the Reasoning
Sudoku Pilot checks your board and notes, then gives the hint in four clues: the technique, a candidate, the search area, and the exact move. Stop as soon as you have enough information to continue.
Technique practiceSkip the Boring Part of Sudoku Practice
Select the Sudoku techniques you already know and run them automatically. You can spend more of the puzzle looking for techniques you are still learning, without asking the app to reveal which one comes next.
Candidate entryEnter Sudoku Candidate Notes Faster
Sudoku Pilot can fill every legal candidate, add one candidate to several cells, or leave all note entry to you. Choose the amount of help you want for the current puzzle.
Configurable controlsChange Sudoku Input and Highlight Settings
Open Preferences to change how numbers are entered and what the board highlights. Each setting is saved in your browser.
Use Sudoku Pilot your way
Import a Sudoku Puzzle From a Screenshot
Upload a screenshot of one Sudoku grid. Sudoku Pilot drafts the filled digits and pencil notes in an editable review screen. Check every cell, fix any OCR errors, and start solving.
Offline SudokuUse Sudoku Pilot Offline
Sudoku Pilot is a Progressive Web App. Open it once with a connection, then install it from your browser for an app-like icon and offline access.
Quiet, local playPlay Sudoku Without Ads or an Account
Sudoku Pilot is free. There are no ads, subscriptions, paid hints, lives, token packs, or required accounts. Optional accounts are available only for players who want cross-device sync.
Player-controlled feedbackTurn Sudoku Mistake Warnings On or Off
Sudoku Pilot starts with live mistake warnings turned off. You can test an idea, catch your own error, and continue without losing a life. Turn warnings on in Preferences if you want immediate feedback.
How the app was built
Every Generated Puzzle Can Be Solved Without Guessing
Every puzzle generated by Sudoku Pilot has one solution and a complete logical path. The app solves the puzzle with its own teaching techniques before adding it to the game.
Puzzle varietyHow Sudoku Pilot Finds Genuinely Different Puzzles
Sudoku Pilot treats digit swaps, row and column rearrangements, rotations, reflections, and transpositions as versions of the same puzzle. The catalog keeps one canonical identity for that whole family.
Puzzle difficultyRating Sudoku Difficulty
Sudoku Pilot rates each generated puzzle by solving it. Expert and Extreme puzzles need at least five separate points where easier techniques run out and a move from that level is required.
Why we built thisWhy We Built Sudoku Pilot
I kept reading about techniques such as X-Wings and Skyscrapers. Then I would open a puzzle and fail to see them. I built Sudoku Pilot to get more practice with that part.