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Creator of puzzles - Big Book Killer Sudoku 480 Hard Puzzles (Volume 4)
Paperback
$8.99
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In Killer Sudoku, sub-regions have specified sums, and no number can be repeated within a region. This variant also called "Sums Sudoku", "Sums Number Place", "Samunamupure", "Kikagaku Nampure".
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