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Normal sudoku rules apply.
Oil and Water: Each cage is either full of 'oil' (even digits), full of 'water' (odd digits), or a mix of both. In all cases, each 'row' within a cage is of just one type (oil or water). Oil floats on water, so even digits will always be in rows above odd digits in mixed cages.
Digits in cages may not repeat and cages with clues must sum to a product of 4. (e.g. a caged marked '1?' can sum to 12 or 16, '2?' 20, 24, 28) All possible cage clues are given.
Digits separated by an V or X must sum to 5 or 10 respectively. All Vs ARE given (negative constraint), however not all Xs are given.
Have fun, leave a comment if you enjoy the puzzle!
Solution code: Column 7 followed by column 8
on 12. October 2023, 14:58 by CaptZebraCakes
Superb puzzle! I really enjoyed this one, and the constraints all worked together beautifully.
on 11. October 2023, 22:54 by danmeehan91324
I tried starting this puzzle without coloring. Bad idea! Nice puzzle!
on 9. October 2023, 22:05 by Blobz
Another great "Oil and Water" puzzle. Interesting logic to discover to unravel everything.