Portal Gun (Fog of War)
(Published on 28. September 2025, 05:00 by Oatmeal)
Portal Gun
Rules:
- Normal sudoku rules apply.
- Portals of the same colour are linked (i.e., blue to blue and orange to orange). These portals connect exactly two cells together, with other constraints being able to traverse these portals.
- There is ONE, and ONLY ONE green German whisper line. Adjacent digits on this line must have values at least 5 apart. When traversing a portal, the German whisper line behaves the same as if it were traversing two normal cells.
- Digits along a purple Renban line form a set of consecutive digits in any order.
- Digits on a thermometer strictly increase from the bulb end.
- Digits separated by a black dot are in 1:2 ratio. Digits separated by a white dot are consecutive.
- Cells separated by a V sum to 5, cells separated by an X sum to 10.
- The grid is covered in fog. Correctly placed digits may or may not reveal fog somewhere in the puzzle. No guessing is required.
Solution code: Row 2 (left to right)
Comments
on 30. September 2025, 20:42 by Dramatiker
Nice puzzle, the portals are a cool thing. Made me re-think a lot :-)
on 28. September 2025, 22:56 by Supalea
I love Portal♥️ and I love this Sudoku♥️ thank you
on 28. September 2025, 21:24 by Myfyr MJ
Very nice puzzle, slightly harder than 1* I think.
on 28. September 2025, 17:36 by Zibl
Fun puzzle!
But I agree with jhsa, the fact that you used an image from Portal and then made the portals work differently was confusing. :)
on 28. September 2025, 16:16 by jhsa
I had to remind myself that portals in this puzzle don't work as they work in the game (and in the picture above). Into the blue, out of the orange (or the other way around).
But I guess the way it's in the puzzle is clearer for those not familiar with Portal.
Anyway, nice and fun puzzle.
Oatmeal: I had a hard time deciding which way the portals should work but ultimately chose this way as it's the least confusing in terms of puzzle flow. Next time I use portal constraints I'll stay away from Valve's portal colours :)
on 28. September 2025, 12:31 by Ndstripes
Very fun!
on 28. September 2025, 07:53 by Martina
A very nice start on a Sunday morning, thank you.
on 28. September 2025, 06:27 by Lion Crow
That was fun. Thankyou.
