Puzzle # 63: XV(-) Sudoku!
G'day! I've been sitting on this XV(-) Sudoku for quite a while now and having just re-test solved it, it's a toughie but a goodie!
Rules:
- Normal sudoku rules apply.
- XV(-) rules: 2 digits in adjacent cells separated by an X or V must sum to 10 or 5 respectively. ALL such markings are given (i.e., there is a NEGATIVE constraint).
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Enjoy, and may the cookies crumble in your favour!
CC :)
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