Logic Masters Deutschland e.V.

I decided it's time to combine my rule with other variants, starting with another one of my favourites - snake. My secondary goal (whim) was to make it symmetrical so i forced it and the result might be a bit crude. In other words i think it's fun and pretty, but i'm guessing it's too simple in some places and inconsistently tricky in one or two spots. Previous fuzzy killer puzzles:

• Loosing my precision 9 (±9)
• Loosing my precision 1 (±1)

Puzzle available in f-puzzles and Penpa+. Note: f-puzzles software won't be able to reliably check the solution because these are not standard cages, Penpa+ version has a solution check for digits.

Normal sudoku rules

• each box, column and row contains digits 1 to 9 once each

• digits cannot repeat within a cage
• number in the top left corner (if given) is the sum of digits in that cage with the first digit as it's precision; for example digits in a cage with given sum 20 (±2) add up to 18, 19, 20, 21 or 22

• Draw a snake (orthogonal path) through the grid from r1c1 to r9c9. The snake cannot touch itself.
• If a cage's sum is given the snake can only go through if digits within it add up to the number in the corner exactly; for example digit 8 is valid in a single-cell 4 (±4) cage, but in that case the snake would not be allowed to pass through it