How to play Sudoku

All the Sudoku's on our website can be solved with logic using these methods.


  Sudoku Rules and Terminology

Basic Solving Techniques

  Last Digit / Full House
  Hidden Singles
  Naked Singles

Solving Aids

  Using Pencil Marks
  Using Highlights

Intermediate Solving Techniques

  Locked Candidates Type 1
  Locked Candidates Type 2 (Claiming)
  Naked Pairs/ Twins
  Naked Triples
  Hidden Pairs

Advanced Solving Techniques

  X Wing
  XY Wing (aka Y Wing)

>> use checkboxes to track your progress.

Start a Random Sudoku

Easy   Medium
Hard   Evil