Sudoku: 500 Sudoku Puzzles(Easy, Medium, Hard, VeryHard)(SudokuPuzzleBook)(Volum
29,71 €
SUDOKU basics: SUDOKU PUZZLE book are made up of rows columns and boxes which all contain nine cells and contain the numbers 1 to 9 only used once. &&&&&&& There have been a number of works in recent years that have focused on solving hard Sudoku puzzles.
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