Sticks And Boxes
I was inspired by @PotatoHead21's puzzle that showcases a geometric fact about any anti-knight Sudoku. I realized that a more general version of that fact is true for Sudoku X, which gave birth to the puzzle below. If you have not attempted @PotatoHead21's puzzle, the difficulty is probably 4/5 or above. Otherwise, the difficulty should be 3/5 at best.
Rules:
Normal Sudoku rules apply. Digits cannot repeat on the marked diagonals. In cages, digits must add to the number in its top-left corner. On thermometers, digits must increase from the bulb end.
Try it here.
Puzzle:
Solution code: Row 9 (left to right) and Column 9 (top to bottom); 18 digits, no spaces
on 12. November 2021, 08:28 by ICHTUES
Wow, very nice!
on 11. November 2021, 15:30 by kolot
Great observation and very nice execution of it!
on 11. November 2021, 08:19 by Phistomefel
Nice observation and puzzle! :)
on 11. November 2021, 02:05 by PotatoHead21
Wonderful puzzle with an amazing break-in. I'm very glad that my puzzle inspired you to create this one.