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Prepare to suffer, kid. 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. So if a square has a +2 in it, for example, and the digit that goes into that square is a 5, that means 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. Using this knowledge and deductive reasoning, can you complete the puzzle? Well, CAN YOU?
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