Modular Stairway
(Published on 5. February 2023, 17:22 by jcgodart)
Rules:
- Normal Sudoku rules apply.
- Global modular : every 2x2 square must contain at least one of each set of residues modulo 3, i.e. one digit from {1,4,7}, one from {2,5,8}, and one from {3,6,9}.
- Anti-Modular lines : every set of three sequential digits along a line CANNOT contain a complete set of residues modulo 3. For instance {153} is not a valid sequence, nor is {729}, but {369} is valid as well as {356} or {127}.
- Digits joined by a black dot are in the 1:2 ratio. Digits joined by a white dot are consecutive. Not all dots are given.
Play online using Sudoku Pad or F-Puzzles
In case you get stuck, here is a video solve
Solution code: Row 9
Last changed on on 8. February 2023, 09:51
Solved by Leonard Hal, Gryllulus, XeonRisq, Racteal, shangchenxi123, karen_birgitta, by81996672, Bjd, Dentones, Azumagao, lianarox, h5663454, maglcstar, DaleVandermeer, PippoForte, SKORP17
Comments
on 8. February 2023, 09:51 by jcgodart
Fixed video link
on 8. February 2023, 09:49 by jcgodart
Added examples and video
Last changed on 7. February 2023, 17:47
on 6. February 2023, 23:44 by Twan2797
I don't fully understand the anti Modular lines. Does it mean you can't have the three sets sequential on a line? Or does it mean you can't have for example 3,6 and 9 on the same line?
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It means you can't have three digits from the three sets sequential on a line. For instance 153 is not a valid sequence, nor is 729, but 369 is valid as well as 356 or 127.
