Sudoku
Normal Sudoku rules apply.
Convergence Lines
An Old Gold colored line is a Convergence Line.
Moving away from the bulb, the values along a Convergence Line converge toward the bulb value. Specifically, each successive cell must be strictly closer to the bulb value than the previous cell.
Equivalently, the absolute difference between a cell's value and the bulb value must strictly decrease at each position along the line, moving away from the bulb.
Note: Each line extending from a bulb is evaluated independently (i.e. a two-way line functions as two separate Convergence Lines sharing a bulb).
Constraint Example
Valid Convergence
Invalid Convergence
For other setters and curious solvers: A standalone companion report exploring the development, design, and logical framework of Convergence Lines is available in this PDF. (The primary discussion is spoiler-free. Puzzle-specific spoilers are confined to the final section.)
Lösungscode: Row 6, Left to Right.
am 7. August 2026, 19:50 Uhr von barnacle
Loved doing some propagation like thermometers. It felt very intuitive to me, and it was fun to work with. Very nice puzzle.
am 7. August 2026, 16:20 Uhr von ShuffBeeeell
I like the puzzle's logic, framing it on my mind as a kind of reverse thermo helped me wrap my head around it and solve in a solid time. 3 stars, very fun, thanks!
am 7. August 2026, 15:15 Uhr von Dr Logic
Super interesting ruleset, the PDF goes into a lot of detail which I like. Difficulty of 2-2.5 stars however, no deduction is difficult to spot.
Thanks for setting, excited to see what you make next :)
am 7. August 2026, 13:58 Uhr von The Pi Guy
That was absolutely magic! What an idea and what a puzzle. Loved it! ❤️ Would highly recommend.
Congratulations as well on publishing your first puzzle. :)
am 7. August 2026, 11:26 Uhr von FireShot7
Flows very nicely!
am 7. August 2026, 10:50 Uhr von wuc
Great new ruleset to me. Very approachable. Got it rather quickly how things work. 2* from solve time. Looking forward to more. Great setting thx.
am 7. August 2026, 09:20 Uhr von Chaka
Very cool idea! 2,5* for me. Thanks for setting and sharing!