Min Max the Diagonal
(Published on 21. February 2026, 20:43 by RailMan)
Normal sudoku rules apply. Place the digits 1 - 9 once in every row, column and box.
Maximums: Blue cells with arrows pointing outwards must be larger than all orthogonally connected cells.
Minimums: Green cells with arrows pointing inwards must be smaller than all orthogonally connected cells.
Thermometers: Digits must increase along a thermometer starting from the bulb.
Positive Diagonal: Digits may not repeat on the positive diagonal.
Custom Fog: Parts of the grid are covered in fog. Placing correct digits may clear the fog somewhere in the puzzle.
Solve Online : Solution Check is enabled
Solution code: Row 9
Comments
on 22. February 2026, 17:38 by nunc
Very nice, loved it!
on 22. February 2026, 10:15 by RailMan
Updated SudokuPad link with new rules
on 22. February 2026, 10:11 by RailMan
Changed the fog rule to not mention how many digits are needed to clear the fog. Sorry for my mistake.
on 22. February 2026, 07:59 by Martina
15 digits for me. Nice flow. Thank you.
on 21. February 2026, 23:15 by BG03
I too could deduce 15 digits before the fog lifted. Perhaps the rules can be reworded to remove the reference to 12 digits specifically. Something like "a certain minimum set of digits need to be deducted to clear the fog"
RailMan: Thanks for the feedback. I changed the rules to fix my mistake.
on 21. February 2026, 23:12 by Matti64
Der Nebel war nach Lösung der positiven Diagonalen verschwunden.
RailMan: Danke. Ich habe die Regeln korrigiert.
on 21. February 2026, 22:00 by anthe95
either i took a very weird solve path, or the fog is not at 12 digits ;)
RailMan: Thanks for the feedback. I changed the rules to fix my mistake.
