Here is this weekend’s special – a unique and never-seen-before Killer Butterfly X
There are 4 “classic” 9×9 Sudoku puzzles inside this one. They all overlap and they all must be solved according to the rules of Sudoku and Killer Sudoku. You can use Twin Nonets solving technique for this one!
However, in contrast with the previous Killer Butterfly, this puzzle must have all numbers from 1 to 9 on ALL diagonals in the puzzle. There are 8 diagonals altogether – make sure you take good care of them.
Warning: This puzzle could be dangerous to your mental health. Do not attempt if not confident!
Have fun!
UPDATE: I had a fair number of people expressing interest and commending Butterfly puzzles, so I intend to promote them a bit more. Therefore, as of Monday January 30, expect at least 2 Butterfly (X) puzzles every week on the Daily Sudoku variants page.
Butterfly Sudoku Killer X.
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