QuadroKropki
(Published on 27. February 2026, 22:47 by Manta-Ray)
Normal sudoku rules apply.
Kropki: Two cells separated by a small white dot contain consecutive digits.
Quads: Every large white circle contains exactly 1 digit (to be determined), which is different for each circle. This digit must appear within the 2x2 region that the circle is centred on.
QuadroKropki: Let the digit in a Quad clue be 'n'. Each large circle also acts as a 'diagonal n-kropki' for the 2x2 region centred on it.
Across one 2x2 diagonal, it acts like a black n-kropki (where one digit is 'n' times the other). Across the other diagonal, it acts like a white n-kropki (where the difference between the two cells is 'n').
For example, a potential QuadroKropki option would be:
19
63
Here, 3 would be the digit in the quad circle. 1 and 3 would be the black n-kropki diagonal (as 3 is three times larger than 1), while 6 and 9 would be the white n-kropki diagonal (as the difference between 6 and 9 is 3).
Solve on SudokuPad
Solution code: Row 8 (read left to right), followed by the Quad digit for the circle in box 3 (separated by a '-', e.g. 123456789-5)
Comments
on 5. March 2026, 07:21 by JoeyJoeJoe
04:35:17 for me - but very rewarding at the end. A little disappointing I had to bifurcate to get the solution. I was left with two choices for R3C7 but couldn't deduce which one to rule out without solving for each.
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Thanks for solving! I think you might have missed an interaction between the Quad clues in boxes 1 and 4 which would have solved the puzzle without the need to bifurcate :)
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Don't get me wrong - I was disappointed in myself - not the puzzle
