The sum of the digits on the red line (not including the digits in the circles) is equal to the sum of the two digits in the circles at either end of that line.
Consecutive digits on a green line must differ by at least five.
Digits on the purple lines must be consecutive but in any order.
Digits on a yellow line cannot be consecutive with any other digit on that line.
Cells connected by a difference circle must have a difference shown by the number in the circle.
Quadruple circle. The four cells joined by the quadruple circle must between them contain any number(s) in the circle
Solve online:Sudokupad.
Solution code: first row
on 10. November 2025, 20:15 by billybeth
clarified rules and put in f-puzzles version of screen
on 10. November 2025, 19:36 by AdamantChorus
When you say "The sum of the digits on the red line is equal to the sum of the two digits in the circles at either end of that line", do you mean "The sum of all but the first and last digits on the red line is equal to the sum of the two digits in the circles at either end of that line"?
Because the red line itself is in the circle cells (unlike how things like between-lines are drawn, where the line doesn't intrude into the circle).
Hi thanks for the feedback. We made the Sudoku in F-puzzles and for some reason Sudokupad changes the image??? Have put in the original F-puzzles image and clarified the rules. thanks. billybeth
on 22. October 2025, 13:23 by JVA
Very neat puzzle with cool interactions
| Difficulty: | ![]() |
| Rating: | 89 % |
| Solved: | 67 times |
| Observed: | 0 times |
| ID: | 000PI3 |