Trespassing Allowed
(Published on 13. August 2026, 19:27 by sujoyku)
Rules:
- Isofill: Divide the grid into 10 regions, each with 10 orthogonally connected cells. Every cell in a region should contain the same digit. All of the digits 0-9 must appear in the grid.
- Little killer: Digits on a marked diagonal must sum to the clue outside the grid.
Here you can solve the puzzle online:
Solution code: Row 5 from left to right (10 digits in total)
Comments
on 10. September 2026, 15:52 by simontherry
Very hard for me, 86 minutes, with quite some mistakes. Took me very long to understand where the pressure was
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Congratulations, simontherry, and thank you for your comment! I can get what you are saying. The lk math works quite differently than it would do in "normal sudoku".
Kind regards, sujoyku
on 30. August 2026, 17:41 by RedBarchetta
4 hours over 4 days and 4 attempts! Definitely a 5 star for me. The break-in discovery was beautiful. Very well designed and fun, thanks!
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Congratulations, RedBarchetta, and thank you for your comment! I am glad you had a fun solve. Also thanks for sharing your take on difficulty.
Kind regards, sujoyku
on 29. August 2026, 20:23 by kasperd
0uch this one was a bit harder than I anticipated.
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Thank you for commenting, kasperd! It is definitely not an easy puzzle. I hope you had a fun solve.
Kind regards, sujoyku
on 28. August 2026, 07:50 by SennyK
Such a wonderful setting from you sujoyku! Lovely unique logic with a lot of great tricks, you can tell that each single clue was crafted with the highest precision. Loved it all the way through, thank you! :-)
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You are much welcome, SennyK, thank you for your kind comment! It is great to hear you liked the logic involved and enjoyed this puzzle.
Kind regards, sujoyku
on 25. August 2026, 00:51 by KeenanN
I had a lot of trouble getting rolling but once I discovered a few more things about the unique logic of this ruleset, the beauty of this puzzle was very clear. Thanks, sujoyku!
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You are much welcome, KeenanN, thank you for your comment! I am glad that you enjoyed the puzzle.
Kind regards, sujoyku
on 24. August 2026, 23:31 by psams
Very interesting, with the first half the most difficult part by far. Thanks for setting this excellent puzzle!
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You are much welcome, psams, thank you for commenting! I am glad that you enjoyed the puzzle.
Kind regards, sujoyku
on 23. August 2026, 19:32 by mscha
Very nice! 3 stars for me. I don't get difficulty ratings on LMD; this one isn't much more difficult than The Great Divide that got 2 stars.
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Thank you for your comment, mscha! I am glad that you enjoyed the puzzle. Initially, I also had it at (high) 3*, but testing feedback suggested it was more reasonable to post it at 4. What concerns "The Great Divide", I think that one is underrated in difficulty, I still believe to be at least 3. Thanks again for sharing your thoughts!
Kind regards, sujoyku
on 20. August 2026, 18:01 by Norkas
Impressive how well you managed to execute on a theme here. It has a clear throughline, but doesn't feel anywhere near repetitive.
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Thank you for your comment, Norkas! I am glad that you liked the puzzle. I indeed tried to be thematic (also for telegraphing), so I am very happy that this came over.
Kind regards, sujoyku
on 16. August 2026, 06:43 by E1gh7
Very fun. I love this variant because it's very geometric and only a little bit arithmetic. You've done that very well here, thank you!
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Thank you for your comment, E1gh7! To me, the puzzle is a mix of both geometry (Isofill) and arithmetics (little killer). I liked the interplay of them, so it is nice to hear that you enjoyed it as well.
Kind regards, sujoyku
on 15. August 2026, 20:38 by Dogfood
Oohhhhh now I get the title. Very fun but tough, 4* for me.
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Thank you for your comment, Dogfood! I am glad you had a fun solve. Considering difficulty, I was torn between 3 and 4, but ultimately posted it at 3. Thanks for sharing your take.
Kind regards, sujoyku
on 14. August 2026, 22:22 by yuripuppies
That was so much math @.@ But I'm proud of myself for completing it, even if I relied on the calculate sums tool far too much lol
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Congratulations on the solve and thank you for your comment, yuripuppies! I hope you had a fun solve.
Kind regards, sujoyku
on 14. August 2026, 18:46 by Franjo
Vielen herzlichen Dank für dieses unglaubliche Puzzle. Ich war mehrmals überzeugt, dass ich es kaputt gemacht hatte, doch dann fand ich jedesmal einen schmalen Pfad, auf dem es weiterging. Fantastisch!
**
Sehr gern geschehen, Franjo, vielen Dank für deinen Kommentar! Es freut mich, dass Dir die Variante so gut gefallen hat.
Herzliche Grüße, sujoyku
on 14. August 2026, 18:09 by Christounet
Great! I love Isofill puzzles. Thanks :)
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You are much welcome, Christounet, thank you for your kind words!
Kind regards, sujoyku
on 14. August 2026, 12:08 by PrissyP
Thank you for this great puzzle with a very nice flow
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Thanks again for testing the puzzle, PrissyP! I am glad that you enjoyed this puzzle's flow.
Kind regards, sujoyku
on 14. August 2026, 08:24 by BigHead
Excellent puzzle, I loved the mix of math and sudoku. Isofill is a great format and shows it off wonderfully!
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Thank you, BigHead! I am glad that you enjoyed the puzzle.
Kind regards, sujoyku
on 14. August 2026, 05:30 by Atticus837
Wow! That's a very nice puzzle, and a great take on Isofill. Took me about 30 minutes all up, but every step was a delight to find.
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Thank you, Atticus837! It is great to hear you had a delightful solve.
Kind regards, sujoyku
on 13. August 2026, 22:07 by marty_sears
Exquisite setting! This was very hard for me once I got past the break-in (which was beautiful) - every cell after that felt hard-won, but ultimately fair. The logic in this felt very fresh, providing a wonderful interplay between arithmetic and geometry. Loved it
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Thank you for your comment, marty_sears! It is great to hear that you liked it.
Kind regards, sujoyku
on 13. August 2026, 20:18 by Piatato
Nice and clean, thanks!
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Thank you, Piatato! I am glad you liked the puzzle.
Kind regards, sujoyku
