Skip to content
VEYRAPLAYPlay
Sudoku Guides

Sudoku Guides

Explore Sudoku rules, solving strategies, techniques, terminology, and deeper reference guides.

Use these Sudoku Guides to learn the rules, solve more deliberately, or look up the exact technique that is blocking your progress.

If this is your first puzzle, start with How to Play Sudoku. If you already know the rules, use Sudoku Strategies to improve your solving routine or jump straight to the Sudoku Techniques library.

The Guides are the reference layer of VeyraPlay Sudoku: each page explains one concept in full, then connects it to related techniques and — when available — the corresponding Learn or Practice experience.

Start with the fundamentals

Build the concepts every other Sudoku guide depends on.

What Is Sudoku?

Understand the goal of the puzzle, the 9×9 grid, and why Sudoku is a logic puzzle rather than a maths test.

fundamentals · beginnerWhat Is Sudoku?Learn what Sudoku is, how the classic 9×9 grid works, what the goal is, and why the puzzle uses logic rather than arithmetic.

Sudoku Rules

Learn the core rule set for classic Sudoku: digits 1–9 across every row, column, and 3×3 box.

fundamentals · beginnerSudoku RulesLearn the core rules of classic Sudoku: place digits 1–9 so every row, column and 3×3 box contains each digit exactly once.

How to Play Sudoku

A first-puzzle guide for learning what to inspect, how to make a valid placement, and how to avoid guessing.

fundamentals · beginnerHow to Play SudokuLearn how to play Sudoku from your first scan to your first placements, with a simple beginner workflow for rows, columns and boxes.

How to Solve Sudoku

Move from the rules to a repeatable solving process: scan, place, update, eliminate, and repeat.

fundamentals · beginnerHow to Solve SudokuLearn a reliable Sudoku solving process: scan the grid, place forced digits, manage candidates and use techniques only when needed.

The Sudoku Grid

Learn the vocabulary of cells, rows, columns, boxes, units, peers, clues, and coordinates.

fundamentals · beginnerSudoku Grid ExplainedUnderstand the anatomy of a Sudoku grid, including cells, rows, columns, 3×3 boxes, units, peers, givens and coordinates.

Candidates and Pencil Marks

Understand the possible digits that remain in unsolved cells and how notes make those possibilities visible.

fundamentals · beginnerSudoku CandidatesLearn what Sudoku candidates are, how to calculate possible digits for a cell, and why candidates unlock intermediate and advanced solving.fundamentals · beginnerSudoku Pencil MarksLearn how to use pencil marks and notes in Sudoku, when to add candidates, how to update them and how to avoid over-marking the grid.

Improve your solving strategy

Technique knowledge matters, but so does knowing when to look for what.

Use the strategy guides to build a solving routine for your current level.

Beginner Sudoku Strategies

Scanning, nearly complete units, Naked Singles, Hidden Singles, and the habit of re-scanning after every placement.

Intermediate Sudoku Strategies

Accurate candidates, Locked Candidates, pairs, triples, and the shift from immediate placements to useful eliminations.

Advanced Sudoku Strategies

Fish, Wings, single-digit patterns, links, and chains organized by candidate structure instead of random searching.

strategies · beginnerBeginner Sudoku StrategiesUse scanning, missing digits, Naked Singles and Hidden Singles to build a repeatable beginner strategy for solving Sudoku logically.strategies · intermediateIntermediate Sudoku StrategiesLearn how to progress beyond Singles using candidates, Locked Candidates, Pairs, Triples and a structured intermediate solving workflow.strategies · advancedAdvanced Sudoku StrategiesLearn how advanced Sudoku solving shifts toward candidate patterns, Fish, Wings, Strong Links, Chains and disciplined search routines.

Explore Sudoku techniques

The Techniques library explains individual solving patterns in depth.

Every technique page is designed to answer four questions:

  1. What is the technique?
  2. Why does it work?
  3. How do I spot it?
  4. What should I learn or practice next?

Beginner

  • Scanning
  • Crosshatching
  • Naked Single
  • Hidden Single

Intermediate

  • Locked Candidates
  • Pointing Pairs
  • Box-Line Reduction
  • Naked Pair
  • Hidden Pair
  • Naked Triple
  • Hidden Triple

Advanced

  • X-Wing
  • Swordfish
  • XY-Wing
  • XYZ-Wing
  • W-Wing
  • Skyscraper
  • Two-String Kite
  • Strong and Weak Links

Beyond the main path

The current library already reaches advanced Fish, Wings, Coloring, Chains, and introductory uniqueness logic. More specialised Expert techniques can be added when VeyraPlay can explain and validate them at the same standard.

techniques · allSudoku TechniquesBrowse Sudoku solving techniques by level and family, from scanning and Singles to subsets, Fish, Wings, Coloring and Chains.

Learn Sudoku step by step

Guides are built for reference. Learn Sudoku turns the same concepts into a structured interactive course with short explanations, controlled board states, exercises, hints, and checkpoints.

The curriculum is designed as:

Foundations → Beginner Solving → Candidates → Intermediate Techniques → Advanced Patterns → Links & Chains → Mixed Practice

A Guide can point to the relevant lesson, while Learn can return to the full Guide whenever you want the deeper explanation.

Practice what you learn

Technique pages also define Practice hooks for the Sudoku runtime.

When controlled practice is available, a technique page can open a validated puzzle state built around the concept you are studying — from Naked Singles and Locked Candidates to X-Wings and mixed recognition.

That completes the product loop:

Understand → Learn → Practice → Play

Sudoku reference

The reference layer will also include content that does not fit into a linear course:

  • Sudoku Glossary;
  • Sudoku Logic;
  • Do You Have to Guess in Sudoku?;
  • difficulty levels and rating;
  • unique solutions;
  • Sudoku theory and mathematics;
  • puzzle generation;
  • history of Sudoku.

These pages turn the Guides surface into a genuine Sudoku knowledge base rather than a collection of isolated SEO articles.

Not sure where to start?

I have never played Sudoku Start with How to Play Sudoku.

I know the rules but get stuck Read Beginner Sudoku Strategies and learn the Singles.

Easy puzzles feel too easy Move to Intermediate Sudoku Strategies, candidates, Locked Candidates, and pairs.

I am trying to solve Hard or Expert puzzles Browse Advanced Sudoku Strategies and the advanced technique families.

I know what technique I need Go directly to Sudoku Techniques.

I want a structured course Open Learn Sudoku.

Keep exploring

Related Sudoku Guides

Fundamentals · BeginnerSudoku RulesLearn the core rules of classic Sudoku: place digits 1–9 so every row, column and 3×3 box contains each digit exactly once.Fundamentals · BeginnerHow to Play SudokuLearn how to play Sudoku from your first scan to your first placements, with a simple beginner workflow for rows, columns and boxes.Strategies · All levelsSudoku StrategiesBuild a practical Sudoku solving routine and learn how beginner, intermediate and advanced strategies fit around individual techniques.Techniques · All levelsSudoku TechniquesBrowse Sudoku solving techniques by level and family, from scanning and Singles to subsets, Fish, Wings, Coloring and Chains.Reference · All levelsSudoku GlossaryLook up Sudoku terminology from cells, boxes and candidates to Fish, Wings, Strong Links, Chains, uniqueness and advanced notation.