See the board
The lesson highlights only the row, column, box and candidates that matter.
SudokuIQ Academy
Learn Sudoku by seeing every move.
Short lessons, interactive boards, and guided practice turn Sudoku rules into solving habits. Start at lesson one or jump to the technique you need.
How it works
A board lesson, not a wall of text
Each lesson turns one logical idea into a repeatable solving process.
Follow the proof
Move forward and backward through the reason each candidate is kept or removed.
Practise the move
Open a suitable live puzzle and apply the same technique without being handed the answer.
Learning path
Build the skill in order
01Start hereSudoku RulesLearn the three rules that make every valid Sudoku move possible.02Read the boardRows, Columns and BoxesSee how every cell belongs to three connected groups at the same time.03Pencil marksCandidate NotesUse small candidate numbers to record what can still fit in an empty cell.04Solving routineScanningSearch for one number at a time instead of jumping randomly around the board.05Beginner techniqueNaked SinglesSolve a cell when its candidate list has been reduced to one number.06Beginner techniqueHidden SinglesFind the only cell in a row, column, or box that can hold a particular number.07Solve safelyCommon Sudoku MistakesRecognise guessing, missed conflicts, and unreliable notes before they derail a puzzle.08Intermediate techniqueNaked PairsLock two matching candidates into two cells and remove them from the rest of the unit.
Reference guide
Need the full Sudoku overview?
Read the complete rules and technique guide, then return to the interactive lessons for focused practice.