Logic Masters Deutschland e.V.

This puzzle was inspired by one of Simons remarks when he solved Schrödingers Zipperlein. I saw gdc put a puzzle up inspired by the same quote about negative digits. Definitely try his out as well here

• Normal Schrödinger rules apply. Place the digits 0-9 into cells such that each digit appears once in every row, column, and box. To accommodate this, one cell in each row, column, and box is a Schrödinger cell, which contains two digits.
• Negative Schrödinger Digit: One (and only one) of the digits 1-9 in a Schrödinger cell is treated as the negative of that digit for any clues in the grid. A digit may only be a negative Schrödinger digit once in the grid and the negative Schrödinger digit must not be zero. (i.e. If the digit 5 is used as a negative Schrödinger digit, it cannot be used in another Schrödinger cell as the negative digit; though it could still be the positive Schrödinger digit)
• Thermo: Along a thermometer, digits must increase from the bulb end. Schrödinger cells on a thermometer are viewed as the sum of the two digits and can be negative.
• Killer Positive/Negative: Digits cannot repeat in a cage (including the negative Schrödinger digit) and must sum to the number in the cage's top left corner. The sums of red-colored cages should be treated as a negative number (i.e. a red cage with a 2 sum would be viewed as -2).
• Fog of War: The grid is covered in fog and placing the correct digits in the fog will reveal the surrounding cells.

Play on SudokuPad

Acknowledgements

Thanks to the CtC fan discord for testing and feedback.