Rules:
Place the digits 1-9 once each into every row, column, and box.
Adjacent digits along a red line have different even/odd parity.
A black dot separates two digits where one is double the other.
A white dot separates two consecutive digits.
Have fun solving!
Solution code: Row 4
on 25. March 2026, 22:54 by apendleton
Agreed, I found disambiguating the bottom right corner of the puzzle pretty tricky, so probably 4* for me, but I might have missed something.
on 25. March 2026, 10:49 by Snookerfan
Fun puzzle! I experienced one hard step about the coloring in the bottom half, but I may have missed something easier. Thanks
on 24. March 2026, 09:11 by Myfyr MJ
Very nice but probably nearer 2 star difficulty for me - 24 minutes.