Rules. Normal sudoku rules apply. Adjacent digits along the marked green lines have a difference of at least five. On the blue line, digits must have an equal sum N within each box it passes through. The sum of all numbers in a cage must match the small number printed in its corner. No number appears more than once in a cage.

Rules. Standard sudoku rules apply.
- No number can appear a knight's move away from itself under the laws of chess.
- Digits along the arrow must sum to the number in the circle (Note: there are four arrows in total, one of which is under the thermo from R3C3 to R6C6).
- Along red lines (thermo lines), digits strictly increase from the bulb.
- Along light and dark blue lines (region sum), the digits on the line have the same sum within each region it passes through (the different colors are just for distinguishing purposes).
- Along the yellow line (palindrome), digits must be read the same forwards and backward.