The Vault
(Published on 10. August 2026, 11:42 by Nurator)
If anyone wondered what I did the last couple of month: I worked hard on a full Sudoku game called Sudoku Mansion, an upcoming game where over 50 handcrafted Variant Sudokus form one interconnected mansion, full with graphics, music and story. Check it out here:
This puzzle is taken directly out of it for you to enjoy for free :) Rules:Normal Sudoku rules apply.
Digits separated by a black dot are in a 1:2 ratio. Digits separated by a white dot are consecutive. Not all dots are given.
Dynamic Fog: Deducing the digit in the highest visible checkpoint (marked with a green square and a number) will reveal new cells and potentially a new checkpoint.
Each line follows a specific constraint type from a list of constraint. It is up to the solver to determine which line belongs to which type.
Each line constraint type may contain no repeated digits anywhere in the puzzle.
At the start of the puzzle, all lines are German Whisper Lines (Adjacent digits differ by at least 5).
Dynamic Lines: When a new checkpoint is revealed, remove the determined line types and all entered digits except those on checkpoints. You are now allowed to new line constraints.
Checkpoint 1: Additionally, the lines can now be Region Sum Lines (Box borders divide the lines into equal sums).
Checkpoint 2: Additionally, the lines can now be Modular lines (Every 3 consecutive cells along a 3-modular line must contain a complete set of residuals modulo 3. i.e: one from (3,6,9), one from (1,4,7) and one from (2,5,8)).
You have completed the puzzle when both checkpoints are revealed and the complete grid is filled.
Solution code: Row 2 (9 digits)
Comments
on 26. September 2026, 19:40 by DesertFox
I've had an idea to create a puzzle where rules are changing as you solve the game. You've done it brilliantly, so I don't have to. Thanks for the puzzle!
on 20. September 2026, 07:54 by kasperd
Initially I had read the uniqueness constraint as applying to all clue types and not just lines. I had to revert quite a lot of digits once I realized.
on 17. September 2026, 11:53 by iEtsh
Neat!
on 17. September 2026, 09:00 by AryaSV
Lovely puzzle! Was disheartening to delete all the digits every time :P But the joy of breaking in every time again was just delightful
on 17. September 2026, 08:05 by SirRanch
Some really fun logic throughout this puzzle, though the final part stumped me for a while. Excellent regardless and thank you
on 11. August 2026, 02:15 by Jaspy94
This might have been my favorite puzzle so far this year! Just about 45 minutes for me, and absolutely loved the checkpoint approach to the solve and had a great time. I think this was the first puzzle I did with that approach, so it took a few checks on the rule set during the solve for everything to click. Thank you for the awesome puzzle
on 10. August 2026, 17:01 by sparkymanu
Very very nice puzzle... it was hard (for me atleast) but so worth the time, thank you for sharing !
on 10. August 2026, 16:23 by Saltensity
What a unique idea, amazing puzzle!
on 10. August 2026, 11:52 by NEWS
Thank you very much for your puzzle and the Sudoku Mansion, Nurator! It is my pleasure to solve this whole masterpiece!
