Logic Masters Deutschland e.V.

Killer - Region Sum Lines - Cave

(Eingestellt am 9. Mai 2022, 20:41 Uhr von abed hawila)

Inspiration for setting this puzzle comes from Udukos's exceptional Killer Cave puzzle.

Note: Don't be frightened by the rules of the puzzle, just read them carefully so that you don't miss any crucial parts.


- Normal Sudoku rules apply.

- Grey squares are walls and green squares are cave. Some of the cells must be colored grey so that all grey cells (the walls) are orthogonally connected to the edge and all other (green) cells form an orthogonally connected area (the cave). Grey cells may not have 2x2 blocks.

- A number in the top left corner of a cell indicates the sum of the digits that are seen from this cell looking to the north, south, east, and west. The cell with the clue counts once in this sum. Walls obstruct the view. A cell with a clue must be part of the cave. Within the field of vision of a clue, digits may not repeat.

- In addition, Grey walls act as Region Sum lines: Meaning that each wall (group of connected grey squares) must visit at least two boxes and the sum of the digits in each box must be equal.

Here you can find a smaller puzzle to illustrate how the rules work:

you can try the 6x6 puzzle: f-puzzle link

The main puzzle:

You can play the puzzle online using the following links:

f-puzzle link

CtC app

All comments and feedback are appreciated!

Hope you have fun!

Lösungscode: Row 2 Column 5

Gelöst von Jesper, Vebby, kolot, Mr.Menace, polar, Elliott810, marcmees, johnyzzh, twobear, ___, by81996672, aruvi, Agent, Playmaker6174, Niverio, KNT, fjam, amarins, Nylimb, jkuo7, maddestmonarch, wildbush7, cdwg2000, ssaper, Christounet, tlepetit, Crusader175, juventino188, SSG, harrison, Carnate, tinounou, geronimo92, Droi, pianobarry87, ns08, udukos, OGRussHood
Komplette Liste


am 24. Mai 2022, 14:58 Uhr von udukos
Awesome puzzle, Abed! Thanks :)

am 16. Mai 2022, 23:37 Uhr von Christounet
Got stuck on this a few days ago. I knew I had to come back and I was damned right ! The logic of the cave digging was so incredibly intricate and interesting. Again, a great thanks to you for your beautiful puzzles !

am 14. Mai 2022, 17:43 Uhr von Niverio
Excellent idea which is excellently executed!

am 13. Mai 2022, 20:46 Uhr von Playmaker6174
Very beautiful and gorgeous puzzle! Though the solve was challenging, every logic felt really rewarding and it made me feel more engaged to get to very end ;)

am 13. Mai 2022, 16:38 Uhr von Agent
What a creative and beautiful puzzle!
It was a marathon for me but every bit of it was well worth it. Thanks!

am 12. Mai 2022, 12:31 Uhr von aruvi
This is such a great puzzle, and the 'note' is very accurate: don't get intimidated by the rules, trust in the genius of Abed and the magic of sudoku and each subsequent step will reveal itself to you. what a masterful puzzle!!

am 12. Mai 2022, 00:10 Uhr von by81996672
great puzzle!Thank you!

am 11. Mai 2022, 09:07 Uhr von twobear
Gorgeous puzzle. Thank you!

am 11. Mai 2022, 01:37 Uhr von marcmees
great puzzle. thanks.

am 10. Mai 2022, 22:14 Uhr von Elliott810
Brilliant puzzle! Thanks:)

am 10. Mai 2022, 11:34 Uhr von polar
Lovely puzzle - thank you!

am 10. Mai 2022, 09:47 Uhr von Mr.Menace
Fantastic puzzle. Took a bit of thinking to see what is going on, but it solves very nicely!

am 10. Mai 2022, 07:31 Uhr von kolot
Another lovely puzzle from Abed Hawila with some very nice logic. Highly recommended!

Zuletzt geändert am 10. Mai 2022, 15:50 Uhr

am 10. Mai 2022, 00:45 Uhr von Vebby
Very nice! Enjoyed this creative ruleset. Thanks Abed :)

am 9. Mai 2022, 22:28 Uhr von Jesper
Great puzzle! The ruleset combination felt quite natural. Thanks, abed

Bewertung:100 %
Gelöst:38 mal
Beobachtet:1 mal


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