On this page you will find a unique type of puzzle. The sudoku you need to solve is made up of all center boxes of these sudokus, in the formation you see in this picture. As a reminder, they are highlighted with a light blue color. As you can see, this Sudoku is completely clueless.
To get aquainted with this format, check the Clueless Guide, which has a few solving tips and an easy starter puzzle. If you have trouble handling this puzzle format, you can download the Clueless Helper, a program that can open these puzzles directly from this website. To check your results, go to the list of submissions.
This is Clueless Special number 677, dated 2023-05-23, rated 41 and requires N2,F3,SK.
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From last week's Clueless Special archive