Radical Rainbow
- Region sum lines
- Whisper lines
- Parity lines
- Entropic lines
- Renban lines
The brief
Normal sudoku rules apply.
Digits in thick bordered squares must be equal to the square root of the 2-digit number read from top to bottom in the corresponding cage. All squares must contain a different digit.
Every square root sign also represents a different constraint.
Parity line (red): Adjacent digits along the red line must alternate in parity (odd/even). Entropic line (peach): A set of three sequential cells along the peach line must contain a low [123], middle [456], and high [789] digit. German Whisper line (green): Adjacent digits along the green line must differ by at least 5. Renban (purple): Digits along the purple line are a set of consecutive, non-repeating digits in any order. Region Sum line (blue): Digits along the blue line sum to the same value in each 3x3 box the line passes through. Thermometer (grey): Digits along the thermometer must increase from the bulb to the tip, which are to be deduced.