Sudoku adult puzzle game that includes 400 great adult puzzles. Solving puzzles support the brain well, improves analysis skills. These are ordinary sudoku books for adults from 6 to 6. Puzzles for sudoku are easier than from 9 to 9 but no less exciting and challenging. The 6 by 6 game is the same as in standard sudoku. All numbers must be added so that they appear only once in each...
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