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1,000 + Calcudoku sudoku 9x9: Logic puzzles hard - extreme levels Basford Holmes 9781652712480

Positive brain awesome game. Suitable for adults. 6 puzzles per page. 500 CalcuDoku sudoku puzzles 9x9 medium levels. 502 CalcuDoku sudoku puzzles 9x9

1,000 + Calcudoku sudoku 9x9: Logic puzzles medium - hard levels|Paperback

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1,000 + Calcudoku sudoku 7x7: Logic puzzles medium - hard levels

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1,000 + Calcudoku sudoku 8x8: Logic puzzles hard - extreme levels (Paperback)

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1,000 + Calcudoku sudoku 7x7: Logic puzzles hard - extreme levels (Sudoku CalcuDoku)

1,000 + Calcudoku sudoku 7x7: Logic puzzles easy - medium - hard - extreme levels (Sudoku CalcuDoku): Holmes, Basford: 9781709073847: : Books