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Difficult level in 4 types of sudoku puzzles. 400 collection puzzles.: Lighthouse Battleship - Yajilin - Calcudoku - Tridoku. Holmes presents a ... can be printed). (Ultimate classic sudoku): Holmes, Basford: 9781794616103: Amazon.com: Books
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4 types of Sudoku puzzles of a very difficult level. 400 collection puzzles.: Lighthouse Battleship - Yajilin - Calcudoku - Tridoku. Holmes presents ... can be printed). (Ultimate classic sudoku): Holmes, Basford: 9781795204323: Amazon.com: Books
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