A New Type Of Sudoku Line

[@PuzzleQodec]

Very happy with this feature, now Nigel has seen an easier puzzle I can go all out again haha.

[@emilywilliams3237]

haha you are hilarious, Qodec!

[@daveturner5305]

Podcast!

[@CrankyOtter]

Wondering if it’s possible to make a 9/8 or 9/7 transmission line…

[@CrankyOtter]

Ok, It could be a useless idea as a big corner L with a 1 cell serif on one end would do it. So much for feeling clever.

[@pouletbelette]

Great construction, Qodec. Very clever and elegant, as usual. Loved it, thanks.

[@TaleraxDeAvon]

7:25 Yeah, blue and O, my favorite pair of colors.

[@chris5619]

And then Simon doesn't even color the 2 blue at that point.

[@hundertzwoelf]

I love how you can tell that a video was recorded in advance, even though it's subtle! Simon usually wishes us welcome to Monday's, Tuesday's etc. edition of CrackingTheCryptic. This video is just "today's edition". Also, no news and no birthdays :D

[@WereDictionary]

I mean if Simon is opening the flood gates of him meeting the constructors... I kinda want an hour of someone asking vaguely sudoku-related questions with Simon and Phistomefel in the hot seats. Or the two of them just having a friendly meet and greet where one of them is hosting the other for a week or so and showing the other around the city. And they are just having a good time all around. I'd just like to see some genuine bonding among cool people "off the battleground".

[@Owen-zs2jm]

I DID IT!!! 56:56! I usually don't attempt the puzzles that involve parity but this one was so fun!

[@codenamevoid2421]

I just love seeing ways in which cells can only contain one digit due to the rule set, being really proud of myself for seeing it, and then Simon comes and fills the cell using sudoku of all things😂

[@LiquorStoreJon]

That's a very cool new rule! I continue to be amazed by the new rules these fantastic constructors continue to come up with!

[@PuzzleQodec]

Thanks for the compliment but I don't deserve those feathers - the constraint definitely existed before. I forgot where that was and what it was called so I guess that's not really helpful, but yeah. :)

[@HunterJE]

Love the self-reference built in to this new clue type

[@HunterJE]

29:49 You can also see the two remaining cells in box 2 are even by looking at the 5-3 line that doubles back through box 3 - it will have to be 5 odd/3 even since you can't put 5 even digits in one box, and that leaves an even and an odd in the two remaining cells in box 3, which uses up the fifth odd in row 3.

[@derekjc777]

Did anyone else spend half the video attempting to tell Simon telepathically about the two even digits in Box 2 and the location of 5 in Box 5? Good to see Simon solve this new type of puzzle, and yet infuriating witnessing him miss the obvious clues!

[@maxsilva11]

It's wild that the 5 in box 5 was deducible so early, and yet ended up being the final digit of the puzzle!

[@daneugea945]

The other thing that drives me absolutely bananas is when he doesn't pencil mark and misses blatantly obvious things that would cut his puzzle times down by a good amount. C'mon Simon just put a few pencil marks in and I PROMISE you you'll have an easier time of things.

[@thenatundi9009]

I love how I started with the eight-cell long line, but simon started with the top left corner, yet both paths led to very beautiful solves!

[@glum_hippo]

Oo I solved this way back when. Glad to see it getting an outing! Thanks Simon and Shkodec!

[@blahdelablah]

Way back when? Hasn't the puzzle only been out for 3 days? Also, is Shkodec a different name for Qodec?

[@glum_hippo]

@@blahdelablah I don’t remember when I tested it but it was quite a while ago. The testing took place long before publication. I was just being goofy with the name, Qodec is well familiar with my shenanigans EDIT: just looked it up, the puzzle was made in early February

[@blahdelablah]

@@glum_hippo Thanks for the extra info, makes more sense now. :-)

[@glum_hippo]

@@blahdelablah I do strive to make sense but usually fail.

[@davidgould9431]

18:12 "this is a very even split, isn't it?" [referring to 3,5] reminded me of the old maths joke: "two is the oddest of all primes because it's the only even one".

[@PuzzleQodec]

Haha that's funny. First time I heard it!

[@davidgould9431]

@@PuzzleQodec I should have mentioned: loved the puzzle! It took me ages (I'm learning variant sudoku as a retirement project - so far, so slow).

[@PuzzleQodec]

@@davidgould9431 Either way it's good for the brain. Keeps it from aging a bit. :)

[@chocolateboy300]

I got it in 53 minutes. This was a really fun ruleset to figure out. Coloring made it easy to see what was happening. I hope more setters do more puzzles with this ruleset. Great Puzzle!

[@TheCandyManCanToday]

1 hour and 40 minutes, pretty proud for a newish player who doesn't even bother taking on puzzles that take Simon an hour or more

[@PavlaH]

I always struggle watching parity shading videos. For some reason, my brain associates even digits with warm colours and odd digits with cool colours. 🤯

[@noahhosking495]

Hmm I think I'm the opposite, something about the symmetry I guess gives me calm vibes

[@tomlevalley6056]

For me- Orange and Odd- both O Blue and Two rhyme, so they pair.

[@tomaszczekaj9016]

Same even digits red odd digits blue😂

[@dedebenui]

Same! Even is hot, odd is cold for me

[@harmonicaveronica]

Me too! I get that O is for Orange and Odd, but I think part of the issue is that they don't actually begin with the same vowel sound. So it only works if you're thinking orthographically and not auditoraly. But I don't visualize spelling (I actually find it quite difficult when I actively try!) so my brain doesn't mesh with it

[@Rubrickety]

This was one of my most fun solves in recent memory. As soon as I got my first real deduction, I said to myself, "I love this new ruleset already!" I haven't watched the video yet, but I'll be shocked if it doesn't feature Simon saying more or less the same. 🙂

[@emilywilliams3237]

I love Qodec puzzles, and this one might just be within my reach. I will have to give it a try, once I have forgotten some of the details of your solve, Simon. Thanks, as always, for the fun and for bringing this brilliant puzzle to the channel!

[@anaayoung9142]

We saw this rule before, I am pretty sure. This was an great puzzle so I hope they do more sudoku with this lines! 😊

[@petergerlagh9858]

Fun new puzzle type. Using line tool to mark sets of cells which contain exactly 1 odd cell was very helpful to me. 38:20

[@Paolo_De_Leva]

_"I think this is the only sudoku constructor [...] I have met in real life..."_ (Simon @0:28) Haven't you met *Tallcat* as well?

[@ericpraline1302]

What a jolly ruleset, thanks. Qodec's puzzles always seem to be graced with elegant logic.

[@inspiringsand123]

Rules: 02:43 Let's Get Cracking: 04:20 Simon's time: 38m29s Puzzle Solved: 42:49 What about this video's Top Tier Simarkisms?! Knowledge Bomb: 1x (03:41) Three In the Corner: 1x (36:08) And how about this video's Simarkisms?! Beautiful: 10x (05:30, 05:33, 11:48, 13:48, 21:14, 30:49, 32:35, 32:35, 42:48, 42:51) Ah: 9x (08:35, 13:39, 18:28, 20:06, 21:14, 23:01, 30:05, 37:14, 42:27) By Sudoku: 8x (23:03, 27:03, 30:00, 33:07, 35:37, 37:19, 39:05) In Fact: 8x (05:09, 05:11, 14:48, 18:22, 29:57, 30:39, 33:07, 38:18) Hang On: 7x (21:08, 21:08, 21:45, 24:35, 24:40) Symmetry: 7x (04:26, 04:54, 04:57, 05:15, 05:28, 43:06, 43:09) Sorry: 6x (10:38, 18:49, 20:56, 25:07, 25:55, 29:03) Clever: 4x (11:50, 11:50, 24:30, 29:31) What Does This Mean?: 4x (10:08, 12:04, 24:45, 33:33) Obviously: 3x (00:35, 09:48, 12:13) Bother: 2x (35:04, 38:36) I've Got It!: 2x (11:41, 21:14) Wow: 2x (05:09, 19:56) Pencil Mark/mark: 2x (07:36, 40:27) Stuck: 1x (22:51) Brilliant: 1x (42:45) Incredible: 1x (43:09) Ridiculous: 1x (05:57) Deadly Pattern: 1x (42:20) Gorgeous: 1x (31:09) Whoopsie: 1x (35:48) We Can Do Better Than That: 1x (17:13) Pregnant pause: 1x (10:38) Progress: 1x (06:01) Plonk: 1x (26:48) Weird: 1x (26:35) Most popular number(>9), digit and colour this video: Seventeen (10 mentions) One (84 mentions) White (7 mentions) Antithesis Battles: Even (97) - Odd (90) White (7) - Black (0) Column (19) - Row (12) FAQ: Q1: You missed something! A1: That could very well be the case! Human speech can be hard to understand for computers like me! Point out the ones that I missed and maybe I'll learn! Q2: Can you do this for another channel? A2: I've been thinking about that and wrote some code to make that possible. Let me know which channel you think would be a good fit!

[@MattYDdraig]

24:54 A really interesting new formation. Took a little while to get my head around but once it got going it flowed smoothly from one deduction to the next.

[@JohnGottschalk]

I made 1 incorrect deduction in box 9 about the arrangement of the parity and ran into a ricket, but after fixing that, it all solved itself. Your logic for the parities is frequently much simpler than mine, I know I must have spent a half hour just thinking about that 1524, and all the options for the second set in their same rows and columns to deduce which combos needed to be where.

[@w00pz4r]

The last digit Simon put in was available for a long time. Just love how we see Soduko so differently

[@dustpan5356]

I don’t think this is a new puzzle type. I seem to recall a puzzle solved on this channel that used this rule set, except the lines looked like “between lines” and the digits in the circles counted the odd/even digits in the line. EDIT: Couldn't think of it before, but found it. It's called "Parity Lines" by ExFalsoQuodlibet, and was featured in this video: kzbin.info/www/bejne/jpPXY5yVasikpqssi=CZwNeUbl-u923b50

[@RichSmith77]

Yes! I remembered that earlier puzzle while doing this one, and remembered it looking like between lines. Thank you for finding the link.

[@JohnRandomness105]

5:00 The double-Z line could have been drawn the other way without change in content. That part is still symmetric despite the drawing. The only thing breaking the symmetry is the white dot in block 1. Of course, I take the position that once a symmetry is broken, it's broken completely in Sudoku. 11:50 Once I figured that the two red cells are both 3s, I realized that with only one odd left on the line, I wouldn't put it past the setter to make that third odd another 3. It wasn't, though. It turned out to be 7.

[@yaelvercammer5468]

Again adding the slowest time, but I still won the race :D 01:33:49 very cool new rule!

[@psiphiorg]

An interesting rule set. I feel like I've seen this before, but it's definitely not a common constraint. My time for this puzzle was 34:44, solver number 6452.

[@randomjunk1977]

For the initial break-in you can also prove that the top U in box one has to be a 24 pair without getting the 3s on the end of the line that goes through the middle box. It's a bit more convoluted though. If you try to make that U a 15, then you have to get 5 odds on it since there's already 2 odds present. the white dot in R1 means that the lone even would have to be up there, so all three squares on the line in R2 are odd. You also have to put an odd on the white dot in box 3 and then because of the 789 triple in box one there has to be at least one more odd in R2 either C1 or C2. That makes five required odds in R2 so they've all been used up. Then we have the 8 cell U with it's ends in box 2, C6. We've used all our R2 odds up already, so R2C6 has to be even now. That means that the only possible combo for the ends is 26. Since, again, all the R2 odds are accounted for there must be two more evens in R2 on the line. That now means 6 evens and 2 odds on that line. Well, since, once again, all the R2 odds are used up the second odd must go on R1 but that uses up all the odds that can go on that line. Moving left there are two dominoes with a dot that must both have exactly one odd each, and then R1C1 is odd. That's only 4 odds total in R1 and no place to put a fifth. Therefore, the top U in box one cannot be a 15. Mark the U ends in box 1 as 15 and 24 appropriately and you quickly get to the exact same spot Simon is at at 13:00

[@CauchyIntegralFormula]

35m43s. I feel like we've had a parity lines puzzle on this channel before, but regardless, it's a fun exercise in chasing colors around the board

[@MarkWiseTechno]

77:21 for me today. It wasn't insanely difficult, but there were obviously parts that had me stuck for a good while. Very enjoyable puzzle.

[@codenamevoid2421]

I always love seeing ways in which digits can only be placed on boxes based on the rules, paritys etc, then seeing Simon using sudoku of all things to fill them in😂

[@MelissaW09]

Don't say youre flummoxed! You haven’t caught up to where i got stuck yet! "Oh, here we go." *sighs in relief*

[@arturocaissut1071]

Very interesting constraint. For some reason my brain had a hard time accepting that (say) an even number sitting at one of the extremes didn't necessarilly indicate the number of even numbers along the line (e.g., a 2 may actually indicate that there are 2 odd numbers), so I got confused a couple of times. Which to me makes this even more remarkable: any puzzle forcing me to suppress these wrong "instincts" is a good puzzle, in that my brain has to work a bit harder.

[@aere481]

Beautiful interaction of the lines.

[@Rach881101]

33:29 for me. Amazing puzzle!

[@enericm]

I could get going on this puzzle after Simon pointed out that the 6 line had threes on the ends, but I kept making mistakes. I think I was on try 8 or 9 by the time I finally did it without errors.

[@andrewcook4873]

Cool puzzle. It’s equal parts gratifying and frustrating when I see something that Simon doesn’t see immediately, like counting odds and evens in the middle box. Then Simon crushes my pride by seeing something that I didn’t spot at all, like that 2 which I spent ages trying to get.

[@pbush071987]

70 minutes. I missed that the 3-3 line could be resolved almost immediately like that, and managed to solve it without by taking a very complicated look at the first two rows and columns, but I got there.

[@victorfinberg8595]

took me a good hour, but i did get through. some interesting logic here, building on standard parity procedures. i did have to use a long chain to knock out the first 1 in box 1, but it was relatively straightforward after that.

[@Gonzalo_Garcia_]

10:58 for me. Very fun puzzle!!

[@GQSmoos]

I made a bad deduction early on and had to restart, but even still I got the solve in 40:10. Fun puzzle

[@daniellucas5522]

Took me a long time to see the break-in, but a lovely puzzle once I got there.

[@Laezar1]

Pretty interesting, loved it when it clicked for me that the two extremities kinda worked like a killer cage

[@carel91]

The W-pentomino of oddnest, great. That will be great music album😂

[@3Max]

Ah, this was a very fun approachable puzzle! Still took some work for me, but very fun. Thank you! Time: 01:28:16

[@katiekawaii]

Such a satisfying puzzle! Loved it.

[@linforcer]

Tried to mess around with this puzzle for a long time... had to come watch the video, as I just did not see the thing simon discovers very quickly at 11:42

[@piarittersporn]

Brilliant and very exciting puzzle

[@srwapo]

42:09, took about 10 minutes to break in and I got lucky to catch a mistake before I used it for further logic. I struggle with these, but it flowed alright after I got the break in.

[@toms7114]

I like this new rule, Parity Lines have some fun interactions.

[@TurquoizeGoldscraper]

33:17 for me - I think I first heard this rule years ago, but I haven't seen any since then.

[@trudain]

27 mins for me on the second attempt. Thanks.

[@DarkChasm]

Yeah, surprisingly simple actually. very well set, very approachable I'd say.❤❤❤

[@Hakucho64]

Needed Simon's insight at 11:40, but otherwise pretty plain sailing. Nice puzzle!

[@raysouth1952]

Great puzzle. Excellent solve. Loved it.

[@tuuurtles]

never thought I had synesthesia until now... it completely throws me off, because even numbers must be a warm color, preferably red and odd numbers must be a cool color, blue is correct!

[@frankjiang1857]

Finished in 42:10. Interesting new ruleset. I wonder if it will be another line ruleset which takes me a long time to solve :(..... Fun puzzle!

[@xyzzyx7812]

excellent new type of sudoku!

[@gatlygat]

Seriously good. Thanks Qodec!

[@selenasilverstep7981]

Simon is committing to the bit of not scanning any hidden 5

[@RoderickEtheria]

I didn't calculate the 3-3 line before I calculated that r12c6 were a 3-5 pair in some order. I did this by calculating the possible totals of odd digits between r12c1-5. If r12c3 was a 15 pair, 5 of the digits on the line plus the 7 and the 9 in b1 would produce 7 odd digits already accounted for in r12, and 3 odd digits not accounted for. If, on the other hand, there was a 24 pair in r12c3, there would be two odds on its line plus the 79 and the white kropki. This produces 5 of the 10 odd digits needed for r12. Either way, it requires a 35 pair between r12c6.

[@timmyexile8141]

Seemed to miss something huge at @14:08, 4 odds already in column 2 and 4 odds implied in column 1 means the bottom left line has 1 odd in column 1 and 1 odd in column 2, so 2 odds. You instantly know that that line has 2 and 6 on its ends. He still got there quick but in a different way.

[@palfly1864]

Hopefully you'll meet more ctc Era setters when you come to sudokucon :p

[@lake1525]

oooo I remember solving this one, absolutely lovely puzzle!

[@werefrogofassyria6609]

The Werefrog got the break in of box 1's 1245 parity by assuming the 4-2 had to be odd, then traced how many odds/evens go in, and found the 5-3 would need to be even, but also that it would be a 5-3 for total parity, so it would be odd. Thus, that paring had to be the 4-2. After doing all then, then noticed the other 6 length that needed 3s on the ends.

[@AndreAy1975]

Solved it with one hint from the video.

[@GilWright]

Hope you are ok SImon - this seems to be the second pre-canned episode.

[@Paolo_De_Leva]

The meta-logic for the *U-shaped lines* was awesome 😍 (although that was not the intended break-in logic, I guess) See reply below for details Fascinating artwork, not only due to innovative ruleset, but also to awesome setting. 👏👏👏👏👏👏👏👏

[@Paolo_De_Leva]

The digits on the tips of the *U-shaped lines* can be disambiguated independently of all the other lines. Based on elementary SET, those in *rows 1-2* must have the same number of even digits as those in *columns 1-2* ... this allows you to deduce, independently of every other clues, that *🔹1+7 = 8* cannot be used, *🔹2+6 = 8* must be in the same rows (or columns) as *1+5 = 6,* *🔹3+5 = 8* must be in the same rows (or columns) as *2+4 = 6,* which implies that the *2x2 square* in the upper left corner of the grid must contain *1 even* and *3 odd* digits. You do not need to solve for the tips in *boxes 3* and *7* (3+3 = 6) to disambiguate the tips in *box 1,* as shown by Simon, although Simon's approach is easier and probably coincides with the intended logic path.

[@travisbosco8469]

For some reason I find this ruleset particularly difficult to conceptualize. I understand the rules logically, but I can't get a "feel" for the puzzle overall. Anyway, another great solve and video, as usual, thanks!

[@AlBoulley]

Simon - you ALWAYS sound under the weather in your opening sentence. Why?

[@kenbolsen8295]

super rule-set polarity without parity and parity without polarity

[@bait6652]

Solvable even if the 2 was changed to even square...but don't think it is w/o give type....tho maybe try it as odd too see if it fails

[@margaretsinclair6697]

What’s the name of these new lines? Transmission lines?

[@adrianhead6272]

Completed in 18m23s

[@conexant51]

Wasn't there a photo posted with Simon meeting TallCat?

[@tallavi6556]

Is that Matt Parker in the thumbnail?

[@Zalaniar]

Ah, one from the backlog? Is Simon away or was he unable to do the video originally intended for today?

[@theredstoneengineer6934]

32:22 for me

[@meleevids]

You should ask people to subsdcribe more. I thought i was subscribed for a long time. turns out I wasn't. Sure am now though

[@iceberg54321]

33:13 you had a naked 5 in box 5, looked at 5's didn't see it. and put it in as the last digit. :) I'm not sure why you colored a few of the one of each parity domino digits, then didn't color any of the others, (all the white dots) and used different colors? That was strange.

[@RichSmith77]

If he'd coloured the two dominoes in box 2 the same colour then they'd have just become a solid 2x2 block, and you wouldn't immediately know if the dominoes were vertical or horizontal. I ended up using the line tool to ring dominoes I'd half coloured orange and blue, but it's more of a hassle. Using different colours would have been simpler.

[@iceberg54321]

@@RichSmith77 Meh, you have a white dot, so you know which way the dominoes go.

[@Pritchie45]

26 minutes

[@gianlucatartaro1335]

Wow, I misread a VERY small aspect of the rules and just wasted SO MUCH TIME 😅 Note to everybody trying this: The lines DO NOT need to have unique values! The value at the end of a line can therefore be more than 5! I put 6 and 5 as the second and third values in the first row, respectively, and wasted SO MUCH TIME just coming to a contradiction. Please don’t make the same mistake I did 😅

[@DJMcFlinty]

10 minutes to finally put the 5 in box 5 🤦‍♂️

[@CasMcAss]

A puzzle where Simon gets to colour in parity; What are the ODDS?

[@PassionPopsicle]

😂

[@andy-kg5fb]

Underrated

[@LardoCulo]

How can you scan for 5’s and completely miss all the 5’s that would have unwound so much 🤪