Sudoku School
Full Access members follow 58 guided lessons, unlock future skills in order, earn progress badges, and finish with the Sudoku Skills Diploma badge.
A complete guided Sudoku learning platform
Master the Grid™
Learn Sudoku through 58 guided lessons and real puzzles that naturally bring each technique into play. Create a free account with only a verified email address, then upgrade when you want the complete School, board animations, curated Library, OCR import, PDF Books, and progress badges.
58 guided lessonsBeginner basics to expert proof
30+ techniquesFish, wings, ALS, chains, and more
Verified email onlyNo payment info needed to register
Diploma badgeA final in-app achievement
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 the final badgeBuild from first wins to candidate logic, branching, famous puzzles, and What-If mastery as each milestone moves you closer to the Sudoku Skills Diploma badge.
Why it feels different
Not just a solver. A training room for your Sudoku brain.
Basic visitors can try a Beginner Random Puzzle. A free account only requires a verified email address and adds the Daily Master the Grid Puzzle, core solver, saved progress, notes, nudges, history, and statistics. Full Access adds technique board animations inside walkthroughs, the complete curated Puzzle Library, Sudoku School, OCR scanning, PDF Books, progress badges, and the final Sudoku Skills Diploma badge.
Walkthroughs that teach
Full Access members replay logical fills, careful branches, manual moves, and final solved states with timeline controls and board highlights.
Your solving replay
Manual moves, candidate notes, and guided 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
Full Access members can choose a Sudoku image, review recognized givens in the browser, validate, and import.
Daily Master the Grid and stats
Signed-in members get one Daily Master the Grid Puzzle selected for their current level, with saved progress, completion history, and streak tracking.
Technique and Effort scores
Choose puzzles with spoiler-safe 0 to 100 scores. Technique Score reflects how advanced the reasoning is, while Effort Score reflects the total solving work.
Saved puzzles
Create a free account to unlock Limited access for saved board state, candidate notes, and your manual replay history.
Puzzle Library
Full Access unlocks the curated practice Library with spoiler-safe Technique and Effort scores. Basic visitors can still try a Beginner Random Puzzle.
Installable PWA
Install Sudoku Skills for a focused mobile experience while server-backed actions stay online and account-aware.
Print and PDF Books
Limited and Full users can print one clean puzzle sheet. Full Access members can generate a 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 with your Daily Master the Grid Puzzle or a Beginner Random Puzzle demo. Limited accounts add blank boards and higher random difficulties. Full Access unlocks the complete curated non-School practice Library and recommendations. Cached Technique and Effort scores help compare puzzles without exposing the hardest technique or solve path. School lesson puzzles stay inside the Full Access School path so the course can preserve lesson order, progress, and badges.
Beginner practice
Try a generated Beginner Random Puzzle as a visitor, then upgrade to Full Access when you want curated beginner sets.
Intermediate logic
Practice candidate thinking, row/column/box constraints, and cleaner manual solving.
Score-sorted practice
Technique Score shows how advanced the reasoning is. Effort Score shows how much total work the puzzle is expected to take. Both use rounded numbers and color bands, not spoilers.
Expert What-If
Learn how the app explains branching choices without turning the board into a black box.
Access model
Register with a verified email address. Upgrade when you want the complete course.
Basic is the visitor experience with Beginner Random Puzzle access. Limited is the signed-in free solver experience and only requires a verified email address. Full Access is the monthly or annual membership for technique board animations, the complete curated Puzzle Library, Sudoku School, progress badges, the final Sudoku Skills Diploma badge, PDF Book generation, and Sudoku OCR.
Feature
Basic - Free
Limited - Free
Full - Membership
Manual entry of a puzzle with validation, and Beginner Random Puzzles
Included
Included
Included
Daily Master the Grid Puzzle
-
Included
Included
Intermediate, Advanced, and Expert Random Puzzles
-
Included
Included
Solver with sophisticated step-by-step walkthrough and technique nudges
-
Included
Included
Save, resume, history, and statistics
-
Included
Included
Technique board animations for additional insights
-
-
Included
Complete curated Puzzle Library and recommendations
-
-
Included
Sudoku School with 58 lessons from beginner basics through expert techniques
-
-
Included
Create your own PDF Book with specified difficulty level
-
-
Included
Sudoku OCR import - import a puzzle from an image, solve it instantly, do a sophisticated walkthrough
-
-
Included
Full Access membership
Monthly and annual options
Prices load from the active Stripe plan configuration so the site can reflect future pricing changes without hard-coded homepage copy.
Master the Grid™
Sudoku School gives practice a purpose.
Preview a guided curriculum course designed to turn beginners into confident solvers. Full Access members get 58 ordered lessons, completed-lesson review, advanced training, and the final Sudoku Skills Diploma badge. Each technique lesson uses a course puzzle where that idea appears naturally, so your progress, badges, and review stay tied to real solving moments.
Ordered lessons
Skill-by-skill path
Reviewable walkthroughs
Badges and Diploma badge
Collect every School badge
From First Steps through ALS, chains, What-If, famous capstones, and the final Sudoku Skills Diploma badge.
Paper solvers welcome
Print one puzzle or generate a full PDF Book.
Many Sudoku fans think best with pencil and paper. Signed-in users can print a single clean puzzle sheet, while Full Access members can generate a server-side downloadable book of 6, 12, or 18 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 6, 12, or 18 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.
Start with one puzzle. Stay for the progress.
Try a Beginner Random Puzzle as a visitor. Create a free account with only a verified email address for the core solver, saved puzzles, history, and stats. Upgrade to Full Access when you want technique board animations, 200 curated puzzles, Sudoku School, OCR import, PDF Books, progress badges, and the Sudoku Skills Diploma badge path.