Yin Yang Yogn
(Published on 17. September 2026, 18:45 by marty_sears)
If you're interested, here's my week 2 puzzle where I impersonated Juggler.
Rules:
Normal sudoku rules apply.
YIN YANG YONG: Divide the grid into three regions of orthogonally connected cells. No 2x2 area can be entirely within one region.
TWO TRUTHFUL REGIONS AND A LIAR REGION: Clues always sit entirely within one region. For two of the regions, all of its clues tell the truth, obeying the rules listed below. However, the 3rd region is a liar region. All of the clues in the liar region break their rule.
CLUE TYPES:
• If a V sits between two digits, they sum to 5.• If a BLACK DOT sits between two digits, one is double the other.
• If a WHITE DOT sits between two digits, they are consecutive.
• If a YELLOW SQUARE sits between two digits, they are not consecutive.
• If a GREEN DIAMOND sits between two digits, they have a difference of at least 5.
• If a RED DOT sits between two digits, one is odd and the other is even.
• A digit in a CIRCLE indicates the sum of all the digits seen in the direction of its arrow that are in the same region as the circle, until the first region border is reached.
Solution code: Digits in the lying region in column 5, reading downwards
Comments
on 24. September 2026, 17:11 by Norkas
Conditional wrogn logic is up there with my favorite sudoku concepts and this was executed in a very fun way.
on 23. September 2026, 07:51 by Vythic
I had to quit and restart it later, 3 Stars is crazy lol. Very cool rules and break-in.
on 19. September 2026, 16:53 by Klausku
Brilliant puzzle, but very hard for me. Almost 4 hours. Ok, first 30 minutes I looked perplexed at the empty grid because I misread the rules (summing and counting are different). After correcting my „error“, it flowed well until mid/end-solve. I overlooked something easy and that made the logic at the end harder than it it is anyways. Brilliant setting, Marty. Who else could have set this. Thanks!
on 19. September 2026, 02:01 by Agent
Great ending!
on 18. September 2026, 21:25 by eladv
I had a real chuckle when I realized (very belatedly!) what the yellow square means inside of the Yogn region.
And the last 20% is truly a marvel -- the order in which the ambiguities unravel is really something. In particular, there are a lot of "slightly wrong" solutions that are very similar to each other, trapping naughty bifurcators such as myself.
This might be the most beautiful "endgame" I've ever seen in a sudoku.
Overall, this puzzle is so delightfully witty, there's no chance this isn't 100% pure "Made In Marty's Brain".
(It's only a Sudoku if it's made in the mad area of Marty Sears' brain, otherwise it's just a Sparkling Brain Teaser)
on 18. September 2026, 17:30 by Tortugo
Unfortunately poor Lake didn’t stand a chance against this.
Some of the clues in this puzzle were just absolutely brilliant and I have no idea how one even begins to set them. I especially loved the two yellow dots in column 1.
on 18. September 2026, 15:53 by blackjackfitz
Huzzah!
on 18. September 2026, 15:36 by mscha
Whew!
Beautiful puzzle! Very Martyesque, I'm sure nobody would be fooled.
It started out easier than I expected, but when I had almost finished the YYY, things came to a screeching halt for me. Slowely but surely I got there, though. Took me 145 minutes.
A high 4 stars for me.
Marty: woo! well done, thanks for persisting with it
on 18. September 2026, 11:08 by RichieRichWalker
Damn, I was on the wrong version AND offline. After having found 3 different valid solutions, I decided to have a look online and found out about the fix. Superb puzzle nonetheless !
on 18. September 2026, 09:09 by Saltensity
Quite a fun and clever puzzle! I have to admit it was a bit daunting to even start with YYY, but eventually some initial observations pushed me to solve it. Thank you for this puzzle (which is definitely yours!)
on 18. September 2026, 03:12 by Christounet
Ha ha ha, I guess I was working on the wrogn version of the puzzle. Until sudokupad reloaded and the good one appeared. Fun puzzle! Thanks :)
on 17. September 2026, 23:28 by marty_sears
Have made a fix to the puzzle (I forgot to include a clue in the version I published to LMD. Whoopsy! apologies for any frustration caused)
on 17. September 2026, 20:15 by Fizz
That was such a clever and fun puzzle, thanks!
on 17. September 2026, 19:53 by emoney1374
Phenomenal puzzle!
on 17. September 2026, 18:49 by ViKingPrime
This could very well be my favourite Marty puzzle (but then, I do have a softspot for shenanigans). One of the most approachable liar puzzles I've seen, too, with just that right balance of difficulty.
