Normal Sudoku rules apply: Place all of the digits 1-9 in each row, column and box.
Normal Knight's constraint: Cells separated by a chess Knight's move must contain different digits.
Normal Thermometers: Digits along a thermometer increase from the bulb (circle) end.
Normal Palindromes: Digits along a plain grey line form a palidrome.
Normal Killer Cages: Digits contained within dashed-line cages must sum to the number indicated in their top corner.
Normal XV clues, no negative constraint: Digits joined by a V or X must add to 5 or 10, respectively. Not all such pairs are indicated.
Puzzle link: https://f-puzzles.com/?id=yk5b6jsj
Solution code: Row 1 and Row 9 (18 digits)
on 11. September 2021, 01:30 by uvo_mod
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