# Sudoku Skills

> Sudoku Skills is a guided Sudoku learning platform for people who want to understand why Sudoku moves are safe, not just obtain answers.

## Product

- Sudoku School contains 58 guided lessons across 8 modules, from board foundations through expert techniques and What-If reasoning.
- Each technique-focused lesson uses a puzzle where the lesson technique appears on the governed curriculum solve path.
- Full Access includes the complete School, technique board animations, 200 curated non-School practice puzzles, OCR import, PDF Books, badges, and the final Sudoku Skills Diploma badge.
- Daily Master the Grid Puzzle is a personal, date-scoped puzzle for signed-in users. Same-day unfinished work resumes. When the app day changes, meaningful unfinished work is preserved automatically in Saved Puzzles before the fresh Daily is prepared; view-only state creates no Saved Puzzle, and completed Dailies remain history.
- Technique Score and Effort Score are spoiler-safe 0 to 100 measures used to compare puzzle reasoning difficulty and total solve work.
- Registration requires a verified email address. No payment information is needed to create a free account.

## Access levels

- Basic: signed-out access to Blank Puzzle, Beginner Random Puzzle, Validate, and single-puzzle printing.
- Limited: free signed-in access to all Random difficulty levels, Daily, Solve, Nudge, non-animated walkthroughs, Save/Saved Puzzles, synced progress, history, statistics, and single-puzzle printing.
- Full Access: paid monthly or annual membership adding the complete Sudoku School, technique board animations, 200 curated Library puzzles, OCR import, PDF Books, recommendations, badges, and the Sudoku Skills Diploma badge.

The Sudoku Skills Diploma is an in-app completion badge, not a formal certificate or external credential.

## Public pages

- [Home](https://sudokuskills.com/): product overview, access levels, School highlights, and feature summary.
- [Play](https://sudokuskills.com/play): Sudoku solving workspace.
- [Sudoku School](https://sudokuskills.com/school): 58-lesson syllabus, module structure, learning path, and badges.
- [Puzzle Library](https://sudokuskills.com/library): Daily, Random, Blank, and curated practice entry points.
- [Help](https://sudokuskills.com/help): user manual, solving controls, Daily behavior, School, OCR, printing, saving, and glossary.
- [PDF Book](https://sudokuskills.com/pdf-book): printable multi-puzzle book feature for Full Access.
- [OCR import](https://sudokuskills.com/ocr): image-to-puzzle import workflow for Full Access.
- [Privacy](https://sudokuskills.com/privacy): privacy practices and data handling.
- [Terms](https://sudokuskills.com/terms): service and subscription terms.

## AI-readable reference

- [Full AI-readable guide](https://sudokuskills.com/llms-full.txt): detailed product, curriculum, access, and feature reference.

## Notes for assistants and crawlers

- Use the canonical clean URLs above rather than legacy `.php` paths.
- Account, Saved Puzzles, Statistics, and the private Admin surface are user-specific or operational pages and are intentionally excluded from the public sitemap.
- Do not describe the Sudoku Skills Diploma badge as an academic, professional, or external credential.