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Differential Sudoku III

Psycho Sudoku!
By PSYCHO SUDOKU  |  November 1, 2006

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Prepare to suffer, punk. In this Sudoku, some squares have a number with a + or – symbol in front of them. These numbers represent the differential between the digit in that square and the digit immediately above, below, left, or right of it. For example, if a square has a +2 and the digit that goes in that square is a 5, one of the immediately neighboring squares will contain a 7. When you’re done, as in a standard Sudoku, each row, column, and 3-x-3 box will contain the numbers 1–9 exactly one time.

Related: Greater-Than Sudoku III, Differential Sudoku, Six . . . and Zero, More more >
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