Technique-first Sudoku learning
Learn Sudoku, don’t just solve it.
Sudoku Coach teaches the reasoning behind each move — from singles to X-Wing — so players can recognize patterns instead of waiting for answers.
Visual example
Naked Pair: two app puzzle cells reserve two numbers
From an expert app puzzle: the two blue cells are both {8,9}; remove 8 and 9 from the other cell in the same box.
Source: bundled Sudoku Coach app puzzle · Expert · tagged Naked Single;Hidden Single;Swordfish;Pointing Pair/Triple;Naked Pair;XY-Wing
How to read this visual
Two cells reserve two numbers.
- 1 Find the pair The two blue cells contain the same two candidates.
- 2 Reserve Those two cells must use those two numbers in some order.
- 3 Remove Other cells in the same unit cannot keep either pair number.
Result: Naked Pair removes the pair numbers from other cells in the unit.
Built around technique practice
Most Sudoku apps give you puzzles. Sudoku Coach helps you isolate one technique, see why it works, and practice it repeatedly.
Recognize the pattern
Each lesson starts by showing what to look for before asking for the move.
Understand the elimination
Hints explain why a candidate can be removed or why a number must go in a cell.
Practice in context
Move from reading a technique to practicing it in guided puzzles, then return to the guide when you need deeper reasoning.
Start with these techniques
A complete core guide for the techniques currently taught in Sudoku Coach, from beginner singles to expert chains.
Single Candidate in Sudoku: How to Spot It
Learn the Single Candidate Sudoku technique: check one cell's row, column, and box until only one legal number remains.
Hidden Single in Sudoku: How to Spot It
Learn the Hidden Single Sudoku technique: when a number has only one possible position in a row, column, or box.
Candidate Notes in Sudoku: How to Use Them
Learn how to write and maintain Sudoku candidate notes so every later technique has reliable evidence.
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