20 Almost Balanced Lines
(Published on 31. May 2026, 04:22 by RockyRoer)
The Rules:
- [Sudoku] Place the digits 1-9 once each in every row, column, and 3x3 region.
- [Almost Balanced Lines]On lines, the sum of the even digits and the sum of the odd digits are almost equal - that is, they are off by one. Digits may repeat on lines if sudoku allows.
The Puzzle:
Solution code: Row 8
Comments
on 8. June 2026, 08:20 by psams
Hey, Rocky, inspired by your puzzle, I created a variant using products of odd and even digits instead of sums, off by one of course. "Dome 11 - Almost Balanced Products"
on 5. June 2026, 06:00 by peacherwu2
Absolute top notch! Especially beautiful at opening!
on 4. June 2026, 17:34 by Awedish
what a legendary eureka moment. thanks for making this puzzle!
on 4. June 2026, 16:37 by Klausku
Most beautiful break-in I‘ve seen in a long time. Thanks for 2 hours of joy.
on 3. June 2026, 05:55 by psams
Really impressed with the way you applied the ruleset to set up the break in, and arranged it in a way to draw the solver's attention. Great example of a puzzle that truly "breaks" on a key deductive step. Thanks for sharing this.
on 2. June 2026, 23:54 by Fool on Hill
The break-in is 4+ to get full value. After that it solves smoothly,. But it is such a cool and unexpected break-in that it took a while, and a break, to see it. Top rank puzzle for the break in and also for making the whole thing work.
on 2. June 2026, 21:18 by Franjo
One of the best puzzles I ever broke! I was able to find the wonderful break-in, but it took several hours until I finally realized that the break-in was even more wonderful! What a puzzle! Thank you so much for creating and sharing this masterpiece.
on 1. June 2026, 19:24 by RockyRoer
Updated difficulty to four stars -- although only the break-in is that. Afterward it should solve like a 2.5 star.
Feel free to comment if you'd like a hint
on 1. June 2026, 09:08 by Piatato
Very cool, thanks!
on 1. June 2026, 06:48 by zeniko
That‘s a very satisfying break-in you‘ve constructed here. Thanks for sharing!
on 31. May 2026, 22:58 by Dr Logic
Super cool!
