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Killer Sudoku: 101 Puzzles

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Killer Sudoku: 101 Puzzles - Ape, D J

Introduced by "The Times, " the British publisher who pioneered the sudoku craze, the "killer sudoku" poses a double challenge: the basic rules of sudoku still apply, but puzzles initially have no numbers showing. All that is known is the sum of the numbers inside irregular boxes, called cages, in which the classic 9 x 9 sudoku grid is subdivided. ...

Killer Sudoku: 101 Puzzles 2006, Ronin Publishing (CA), Berkeley, CA

ISBN-13: 9781579510350

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