Mathematician Claims Breakthrough in the Sudoku Problem
Puzzled man solving 'miracle' sudoku becomes sensation
The mathematics of games and puzzles from cards to sudoku
The Math Behind Sudoku: Introduction to Sudoku
The Mathematics Behind Sudoku: Solving Strategy, Article
Mathematician Claims Breakthrough In Sudoku Puzzle
Mathematical challenge: Can you solve this ultra-complex
Challenging Fun Brain Teasers: Hard Logic Puzzles & Brain Games
Mathematics of Sudoku - Wikipedia