CRAZY SUDOKU Large Print Puzzle Book For Adults: 2018 9x9 Sudoku books; Easy, Medium, Hard Difficultly; for Sudoku lovers; 90 Challenging Puzzles (Vol.1) - Mony S. C. - 9781980568452- LibroWorld.com
One Choice Method, Solving Sudoku Puzzle Method
World Sudoku & Puzzle Championship 2018 – 4-11 November 2018, Prague, Czech Republic