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Normal sudoku rules apply.
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Killer Cages: In cages, digits sum to the number in the top left corner of the cage. Digits do not repeat within a cage.
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Odd: Cells with grey circles contain odd digits.
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Kropki: Cells connected by a black circle contain digits with a 1:2 ratio. Not all possible circles are given.
Solve online:
F-puzzles,
Sudoku Pad
Author's note (contains some, though not too helpful, hints for solving the puzzle):
Dem trees throwin' shade :-)