Recently I started to try to set some sudoku puzzles, with thermos and killer cages.
This is my fourth try, I think I managed to include a pretty tough trick, but I'm not sure if it's necessary to solve the puzzle or not.
Anyway, I'm curious about your opinions, please give it a go and share your thoughts with me. Thank you!
https://supradoku.com/play/apsFoH6GbYex
