Hydrogen
(Eingestellt am 11. August 2026, 08:00 Uhr von Kaktuslav)
Rules: Normal sudoku rules apply.
Circles and pluses: Place nine circles in the grid: one in each row, column, and 3×3 box, with the circled cells forming a complete set of the digits 1–9. A digit in a cell containing a plus equals the sum of two summands: the circled digit in its row and the circled digit in its column.
Lösungscode: Row 9, with the circled digit in brackets, e.g. 123(4)56789
Kommentare
Gestern, 15:03 Uhr von puzzlepandit
Interesting concept and nice flow.
am 16. August 2026, 14:18 Uhr von Rabarberkalle
Nice. A bit tricky at first but once you grasp the concept it was quite easy from there.
am 15. August 2026, 15:06 Uhr von Agent
Great puzzle, some fresh logic and fun to solve!
am 13. August 2026, 08:01 Uhr von Crusader175
Very nice!
am 12. August 2026, 20:21 Uhr von greebug
Another beauty from Kaktuslav!
am 12. August 2026, 15:38 Uhr von highonlife
This is easily over 3* in difficulty. Close to 4.
Really beautiful concept though.
am 12. August 2026, 15:37 Uhr von highonlife
This is easily over 3* in difficulty. Close to 4.
Really beautiful concept though.
am 12. August 2026, 15:28 Uhr von amirs
Once I understood the rules, the puzzle became very smooth and fun. Before that I was shaking my head wondering how it could ever be 2*...
am 12. August 2026, 02:54 Uhr von Snookerfan
Very nice, I did not solve it the 2 star way I guess, thanks for the challenge!
am 12. August 2026, 01:25 Uhr von pmays123
This one was very tough for me to get into the right mindset, but I really enjoyed it. Great challenge. Thanks for sharing!
am 11. August 2026, 19:24 Uhr von marcmees
Great puzzle fun. 3*imo. Thanks
am 11. August 2026, 17:38 Uhr von GeorgeTheToad2
Thank you Kaktuslav for a lovely puzzle that was a treat to solve. I would agree with a 2* difficulty if you can see how to start otherwise it becomes more difficult.
am 11. August 2026, 15:25 Uhr von Kaktuslav
Clarifying that each plus corresponds to a sum of two digits.
am 11. August 2026, 13:13 Uhr von Dogfood
Loved it as always. Definitely 2* once I approached it right. Good lunch break snack.
am 11. August 2026, 11:38 Uhr von sujoyku
Awesome puzzle! I found it much harder than 2 stars, but I enjoyed it mightily. Thank you, Kaktuslav!
