Logic Masters Deutschland e.V.

X-Sum-Dots

(Published on 31. January 2026, 00:55 by Oddlyeven)

Rules: Normal Sudoku rules apply. Put the digits 1 to 9 once each into every row, column and box of the 9x9 grid.
Sum Dots: Numbers in cells (inside or outside the grid) touching a gold sum dot sum to the indicated total. Numbers may repeat if allowed by other rules. All cells outside the grid that are touched by a sum dot are X-sum clues.
X-Sums: A number N in a clue outside the grid indicates that the first X digits in the direction of the clue sum to N, where X is the digit next to the clue.

Links:
SudokuPad: https://sudokupad.app/k0d04p43yg

Solution code: Row 3, left to right (9 digits).


Solved by Calvinball, h5663454, jordanza, maniacaljackal, Crusader175, gdc, by81996672, FireTruckFuel, marcmees, Piff, cornish-john, Exigus, Silentdodo, AKernel, Snookerfan, samuel1997, palpot, sedici, nunc, killer_rectangle, samjna0049, Franjo, SKORP17, Titan29, Vodakhan , hearnicane, Nagesh, Mr_tn, Crul, ManuH, Scojo, MathGuy_12, SennyK, swnlmd
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Comments

on 31. January 2026, 20:22 by Franjo
Thank you very much for creating and sharing this awesome gem of a puzzle.

on 31. January 2026, 16:45 by Snookerfan
Very nice! I found it quite hard actually, but enjoyable. Thanks

on 31. January 2026, 15:50 by VitP
fairly easy for experts, still doable by beginners, so level 2

on 31. January 2026, 13:55 by Exigus
I found it a bit tricky but very enjoyable. Thanks!

on 31. January 2026, 12:00 by marcmees
Looks frightening at first but clues are well chosen to solve smooth. Thanks

on 31. January 2026, 07:29 by FireTruckFuel
This is the smoothest puzzle I have ever solved, hands down. Thanks to Crusader 175 for being a most recent comment just when I was scrolling the portal.

on 31. January 2026, 05:50 by Crusader175
Enjoyed solving this a lot!

Difficulty:3
Rating:92 %
Solved:34 times
Observed:0 times
ID:000R8R

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Solution code:

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