In this Quattroquadri some Sums sum Sums, and some Sums don't sum Sums.

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BremSter solves "Broken Bounds" by Palfly Kampling.
This Quattroquadri uses an X-Sums Variant constraint.
Solve in Sven's SudokuPad WebApp: https://sudokupad.app/mk21s0vkv8


📋 Puzzle Rules:
• Quattroquadri: Fill every cell in the grid with the digits 1-9 so that there are no repeats in rows, columns, or boxes.
• X-Sums: The clues outside the grid give the sum of the first X digits, where X is the first digit seen from the clue. If X is 7 or higher the X-sums clue on the other side of the row is included (read as a number, not individual digits).
For example, if a row is 476258 left clue would be 19 and the right clue would be 51.
Clarification: even if the outside clue is not given it counts, in the example the right clue would be 51 whether or not the left clue is written.


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