Bright Champs - The name Sudoku comes from Japanese word Su (meaning 'number') and Doku (meaning 'single') but it was not invented in Japan. Sudoku originated in Switzerland and then traveled to
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Tägliches Sudoku | Coopzeitung
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Das Rätselportal | Das Rätselportal
Sudoku & Paper Games” by Jean-Marc Rastorfer (Lausanne, Switzerland) | MinXus-LynXus III
Mega Sudoku | Keesing Schweiz AG
The History of Sudoku | Play Free Sudoku, a Popular Online Puzzle Game