Sudoku training that feels like a course

Master Sudoku step by step.

Sudoku Skills combines guided lessons, teaching walkthroughs, smart nudges, What-If training, OCR import, saved progress, and visible achievement badges so every puzzle helps you become a stronger solver.

Preview Sudoku School Try a puzzle now Create account

Guided lessonsUnlock skills in order Teaching walkthroughsUnderstand every step OCR and What-IfPractice from real puzzles Badges and diplomaEarn visible progress

Your next breakthrough

Learn the move, not just the answer. Sudoku School turns each puzzle into a coached practice session with smart nudges, notes, and replay tools that help the logic click.

Badges to diploma

Build from first wins to candidate logic, branching, famous puzzles, and What-If mastery as every badge moves you closer to the Sudoku Skills Diploma.

Why it feels different

Not just a solver. A training room for your Sudoku brain.

The strongest parts of the app are right up front: a guided School path, solver explanations, your own replayable solving history, spoiler-free nudges, What-If exploration, OCR scanning, stats, saves, badges, and a diploma goal.

Sudoku School

Follow a guided lesson path, unlock future skills in order, earn badges, and build toward the Sudoku Skills Diploma.

Walkthroughs that teach

Replay logical fills, nudges, successful guesses, manual moves, and final solved states so the path makes sense.

Your solving replay

Manual moves, candidate notes, and inferred explanations turn your own path into a reviewable lesson.

Smart nudges

Ask for one useful next step without surrendering the whole puzzle or spoiling the lesson.

What-If training

Explore alternate cube combinations and see how wrong paths get stuck or contradict.

OCR scan and import

Choose a Sudoku image, review recognized givens in the browser, validate, and import.

Daily Puzzle and stats

Build a daily habit, track completions, review history, and watch your solving streak grow.

Saved puzzles

Create an account to unlock Limited access for saved board state, candidate notes, and your manual replay history.

Puzzle Library

Start from blank boards, random puzzles, Daily Puzzle, and curated practice cards grouped by difficulty and tags.

Installable PWA

Install Sudoku Skills for a focused mobile experience while server-backed actions stay online and account-aware.

Print and PDF Books

Print one clean puzzle sheet or generate a full Sudoku Skills PDF Book with puzzles and matching solutions.

Choose your next challenge

The Puzzle Library is the new starting point.

Open the library from App tools to start a blank puzzle, generate a random puzzle, play the Daily Puzzle, continue with a recommendation, or choose a curated non-School practice puzzle. School lesson puzzles stay inside the guided School path so the course can preserve lesson order, progress, and badges.

Beginner practice

Build confidence with approachable generated and curated puzzles.

Intermediate logic

Practice candidate thinking, row/column/box constraints, and cleaner manual solving.

Expert What-If

Learn how the app explains branching choices without turning the board into a black box.

Access model

Start with Basic access, then grow into a training path.

Basic access lets anyone play, validate, generate a blank puzzle, generate beginner random puzzles, and play the Daily Puzzle. Limited access adds every random difficulty, Solve, Nudge, walkthroughs, saving, Saved puzzles, history, streak foundations, and statistics. Full access adds Sudoku School, badges, the Sudoku Skills Diploma, PDF Book generation, and Sudoku OCR.

Feature

Basic

Limited

Full

Play, validate, blank puzzles, beginner random puzzles, and Daily Puzzle

Included

Intermediate, Advanced, and Expert random puzzles

Included

Solve, Nudge, and walkthroughs

Included

Save, resume, history, and stats

Included

Sudoku School, badges, and Sudoku Skills Diploma

Included

PDF Book generation

Included

Sudoku OCR scan import

Included

Guided curriculum

Sudoku School gives practice a purpose.

Open the preview, see the badge path, and imagine a Sudoku course that tells you what to learn next. Lessons unlock in order, completed lessons can be reviewed, and the full path is designed to grow into Full access with advanced training and the Sudoku Skills Diploma. Dedicated lesson puzzles stay inside the School overlay so progress, badges, and review remain tied to your account.

Ordered lessons Locked future skills Reviewable walkthroughs Badges and diploma

Preview Sudoku School Create account

Collect every School badge From First Steps through the full Sudoku Skills Diploma.

First Steps

Foundation Builder

Beginner Graduate

Candidate Builder

Hidden Single Hunter

Locked Candidate Locksmith

Pair Specialist

Triple Tactician

Pattern Spotter

Fish Finder

Wing Master

Branch Explorer

What-If Navigator

Famous Finisher

Sudoku Skills Diploma

1. LearnStart with approachable lessons that make rows, columns, boxes, candidates, and simple placements feel natural.

2. PracticeUse Nudge, Restart, notes, and replay tools without the temptation to reveal the full answer.

3. UnlockFinish earlier lessons to open harder skills, famous puzzles, and advanced What-If training.

4. EarnCollect milestone badges and work toward the Sudoku Skills Diploma as the curriculum grows.

Paper solvers welcome

Print one puzzle or generate a full PDF Book.

Many Sudoku fans think best with pencil and paper. The Print action creates a single-page puzzle view, while PDF Book generation creates a server-side downloadable book of 5, 10, or 15 puzzles with a Sudoku Skills cover page, two puzzles per page, headers and footers, page numbers, and numbered solutions at the end.

One-page print view PDF Books of 5, 10, or 15 puzzles Two puzzles per page Numbered solutions included

Intermediate Logic Practice Skill level: Intermediate

PDF Books are generated server-side with puzzle pages first and compact numbered solutions at the end.

Ready to build a Sudoku habit?

Start with one puzzle. Stay for the progress.

Try the board right away, create an account when you want Limited access for saved puzzles and stats, and preview Sudoku School to see how badges and the diploma path will turn practice into a course.

Launch the app Create account