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Kakuro and Even-Odd Sudoku: 200 Kakuro and 200 Even-Odd Sudoku Diagonal + Anti Diagonal Hard Levels Puzzles. : Kakuro 15x15 + 16x16 + 17x17 + 18x18 and 200 Sudoku Heavy Logic Puzzles. (Series #4) (Paperback) - Walmart.com
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Giles Ensor's Fantastic Pocket Puzzles: 108 Extreme Sudoku 18x18 - July 2022: Ensor, Giles: 9798839255319: Amazon.com: Books
Sudoku 18x18 - 106 leere Gitter: 1 Gitter pro Seite; 21,6 cm x 27,9 cm; 8,5" ... 9781687626837 | eBay
Basford Holmes · 200 Kakuro 17x17 + 18x18 + 19x19 + 20x20 + 200 Calcudoku Sudoku Very hard levels. (Paperback Book) (2018)
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