Fish
X-Wing
Learn the four-corner candidate pattern.
Interactive Sudoku training
Sudoku Learn Arena
Pick a technique, then learn it using Show Me, Help Me or Let Me mode.
Choose a technique
Beginner
Naked Single
Place the only candidate left in a cell.
Beginner
Hidden Single
Find the only place a digit can go in a unit.
Locked candidates
Pointing Pair
Use a box to remove candidates from a row or column.
Subsets
Naked Pair
Reserve two digits across two cells in one unit.
Wings
XY-Wing
Use a pivot and two wings to remove a candidate.
Single-digit chains
Skyscraper
Connect two strong links to find a shared removal.
Interactive lesson
Interactive Logic Theatre
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Learn Sudoku techniques by doing
The Learn Arena turns each technique into a guided board exercise. Show Me mode demonstrates the pattern step by step, Help Me gives progressively stronger prompts, and Let Me lets you identify and apply the move yourself.
Start with Naked Single and Hidden Single, then progress through Pointing Pair, Naked Pair, X-Wing, XY-Wing and Skyscraper. Each lesson keeps the relevant candidates on the grid so you can connect the written rule to the actual cells.
For the full progression and written explanations, visit the Sudoku techniques library. When you are ready to apply the ideas to a complete puzzle, the Sudoku Coach can explain the next logical step.