Under Lock and Key
(Published on 6. February 2026, 21:51 by MSDOS)
click on image to play
This puzzle was made for Scojo's weekly prompt. The prompt redeemed by MathGuy_12, and was to create a puzzle using Sum Dots. I hope you enjoy!
Rules
Normal sudoku rules apply.
Ciphered Sum Dots: Digits in cells touching a Sum Dot sum to the value of that Sum Dot (which in this puzzle must be deduced by the solver). Dots with the same letter have the same value. Dots with different letters have different values.
Play on SudokuPad!
Solution code: Row 2 from left to right. (9 digits)
Comments
on 11. February 2026, 06:53 by PancakePie
What a fun journey! Thank you!
on 10. February 2026, 00:34 by MiguelMunoz
Elegant, but tough!
on 7. February 2026, 17:16 by Ambrose
Wonderfully satisfying!
on 7. February 2026, 16:13 by Franjo
Thank you very much for creating and sharing this lovely cryptic puzzle.
on 7. February 2026, 14:26 by Snookerfan
Excellent! Thanks
on 7. February 2026, 05:05 by vitaminz
Really nice use of both algebra and coloring!
on 7. February 2026, 00:08 by Manta-Ray
Great puzzle, lots of interesting logic!
on 6. February 2026, 23:51 by Wuschel
Very nice, thank you!
on 6. February 2026, 21:58 by Andrewsarchus
Very well placed clues. Really enjoyed this one!
on 6. February 2026, 21:58 by egubachu
Wonderful use of arithmetic and geometry! This puzzle was a joy to solve!
