Logic Masters Deutschland e.V.

What Number am I thinking of? (NOT 5)

(Published on 21. March 2025, 16:29 by Br1312te)

Solve on Sudokupad. The puzzle can only be solved online due to the fog mechanic.

Rules:

Pick five digits from 1-9. Place those five digits in each row, column and box.

V's: digits connected by a V must sum OR subtract to 5. For example, 2+3 or 9-4 are both valid.

Parity: digits on a grey square are even. Digits on a grey circle are odd.

Kropki dots: digits connected by a white dot are consecutive.

Fog: the grid is partially covered in fog. Placing correct digits will clear the fog. No guessing is required.

If you enjoyed this puzzle, you might enjoy this one as well:

What Number Am I Thinking Off

Love, Brigitte

Solution code: Row 3 from left to right (5 digits in total)


Solved by StefanSch, cornuto, Garizon, Archon, Fisherman, xrrx, ccotreau, kublai, SKORP17, Morla, killje, Uhu, cfunkmi, zhangying751009, schnitzl, zlotnleo, gdc, dingledork, GaviGuy, GrumpyMan, Raistlen, ... Crusader175, ole-1995a, QuiltyAsCharged, drf93, MaxSmartable, Aaravos18, zeniko, Galc127, widjo, sarabtx, BlackApolloX, Khatru, Chaossudokusplease, maiaz, bilms, pepe74287, SudokuHero, Atoro
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Comments

on 22. March 2025, 07:38 by TheNineElements
Solve Time: 8:57

I rated this 2/5 difficulty.

This was a really great puzzle! Absolutely beautiful puzzle, with such a nice logical sequence.

I agree with @Garizon that this was probably harder than 1* in terms of difficulty/complexity. My solve time was obviously very fast compared to the "average 2* sudoku", but this is obviously expected for a smaller puzzle (especially a 5*5), and the underlying logic was a bit too tricky for a 1* puzzle.

Each of the elements of the rules worked together nicely, and the way that the chosen digits were disambiguated/constrained was very nice and a really cool geometry.

I used some labeling and coloring tricks to be able to make progress at first. Figuring out how to effectively color/notate was definitely the hardest part for me, and this was probably the hardest 'aspect' of the puzzle - and is why I rated it 2* difficulty. By the time that I managed to place my first digit, the subsequent logic & fog reveal unraveled everything for me and I solved the puzzle quickly afterward.

Overall this was an excellent puzzle! It's a really good choice for a quicker solve, without any sacrifice to the beauty of the puzzle's logic.

P.S., I felt like the 'V' rules were a bit odd, but even so, they balanced out nicely with the rest of the other rules ;)

on 21. March 2025, 18:07 by Fisherman
Sweet.

on 21. March 2025, 17:37 by Garizon
With the choose your own digit constraint I found this more difficult than 1*, especially given the size of the grid. Great puzzle thank you for sharing.

Difficulty:2
Rating:89 %
Solved:63 times
Observed:4 times
ID:000MJ1

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