GENIUS ACADEMY · 10 LEVELS

Learn Sudoku by understanding why.

Start with one-candidate deductions and progress toward chains. Each lesson gives you a pattern, a repeatable method and a direct path back to a real puzzle.

Level 1: Naked Single
One empty cell has only one legal candidate.Level 2: Hidden Single
A digit has only one possible cell inside a row, column or box.Level 3: Locked Candidates
Candidates confined to one line inside a box eliminate that digit elsewhere on the line.Level 4: Naked Pair
Two cells in a house contain the same two candidates.Level 5: Hidden Pair
Two digits occur in only the same two cells of a house.Level 6: X-Wing
A digit appears in exactly two aligned cells across two rows or columns.Level 7: XY-Wing
Three bivalue cells form a pivot and two wings that force a shared elimination.Level 8: Simple Coloring
Alternating strong links reveals contradictions or shared eliminations.Level 9: Forcing Chain
Follow linked implications until every branch proves the same result.Level 10: Genius Review
Combine techniques and explain every elimination before committing it.