Logic Masters Deutschland e.V.

Foghqwhgads v2

(Published on 9. March 2023, 13:58 by ThePedallingPianist)

Joint authorship with my dad

> Play on CTC
> View sudoku on f-puzzles (SPOILER ALERT: Fog is not shown on f-puzzles, so all clues are visible)

Try a smaller practice puzzle first!

This is our revision of the original Foghqwhgads, which begins the same but takes a different path after the first handful of digits. Please see the solution guide for the original if you require help with the break in - I'm afraid you're on your own for the rest of this one though!

We made this second version for three main reasons: it avoids a somewhat bifurcatory step that existed in the original; it maintains a more consistent difficulty where the original had a few uncharacteristically "easy" deductions (sorry not sorry!); and it removes all overlapping lines and therefore the ruleset can become much more concise.

Everybody to the limit



Normal sudoku rules apply.

"Fog of war": The grid is covered in fog, which will lift to reveal clues as correct digits are entered.

"Filler": Shade some cells such that each digit in row 1 (top) indicates the count of shaded cells in its column, and each digit in column 1 (far left) indicates the count of shaded cells in its row. E.g. a 3 in r1c8 indicates that there are 3 shaded cells in column 8.

"Yin Yang": All shaded cells must form one orthogonally connected region, as must all unshaded cells, and no 2x2 square can consist of only shaded or only unshaded cells.

"Balancer lines": Along balancer lines, the sum of the digits in shaded cells equals the sum of the digits in unshaded cells. The lines do not branch or overlap.

Solution code: Row 9 (bottom row)


Solved by jalebc, Gryllulus, Snookerfan, SKORP17, bansalsaab, giladooshlon, jkuo7, Tom-dz, madhupt, wilsig, HolgerTra, wenchang, Afterthought, bodemeister, laky, lianarox, pieter888, Terrapin, sanabas, Onyx, ... CrippledLamp, saskia-daniela, Sewerin, arteful, fopkovic, Mikemerin, MaxSmartable, rich_27, dogfarts, MaNCS, halakani, Raistlen, karlmortenlunna, duckling, DylanRay, Mikkel_a, kowareta, steeto
Full list

Comments

on 23. March 2023, 09:14 by laky
The first two puzzles really help me to solve this one,so I don't think this one is very hard

on 20. March 2023, 12:18 by bodemeister
Crazy hard, amazing rule set, and brilliant logic throughout. Felt like I had to work hard for every deduction. 10/10!

on 14. March 2023, 06:11 by wenchang
Enjoyed! Very Hard! Spoiler alert!
https://youtu.be/ifcjW75iklI

on 10. March 2023, 21:39 by wilsig
Lot of fun!

on 9. March 2023, 16:23 by Snookerfan
Excellent puzzle! The revision turned it into a whole new experience. Hopefully this one will get many more solves, because it deserves it.Thank you and your father so much!

Difficulty:5
Rating:88 %
Solved:48 times
Observed:8 times
ID:000D7R

Standard puzzle Puzzle combination Puzzle variant Variant combination Shading puzzle

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