We Thought We Understood Sudoku...
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Today's puzzle is called Renban Dance and it's another by Qodec. We thought we understood how renban sudokus worked... it turns out we were wrong! You can play the puzzle at the link below:
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Rules:
Normal sudoku rules apply. Each line contains a set of consecutive, non-repeating digits, in any order. Cells with a grey circle must contain an odd digit.
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▶ABOUT US◀
Hi! We're Simon Anthony and Mark Goodliffe, two of the UK's most enthusiastic puzzle solvers. We have both represented the UK at the World Sudoku Championships and the World Puzzle Championships.
Thank you for watching!
Simon and Mark
@magnusahlberg5216 3 жыл бұрын
Me: *** So proud of doing the deduction that Simon colours first. *** Simon: Now, I don’t think that’s a _stupid_ deduction, but…
@HunterJE 3 жыл бұрын
31:43 "So that cell becomes a 9 out of nowhere" ...if you ignore the 123 triple that's been in its box for ages ;) (NOTE: no shade, I couldn't begin to follow the black magic going on here without Simon's commentary, and if I could I'd almost certainly miss even more obvious things with my brain cycles occupied by it)
@ragnkja 3 жыл бұрын
At least “ages” in this case is only about four minutes, not upwards of twenty.
@57thorns 3 жыл бұрын
@@ragnkja That is also something, when watching a solve, four minutes is ages. When I solve myself, four minutes is one board scan.
@RyanAtOptimism 2 жыл бұрын
YES! Came here to say this. He used the 123 triple in the row, but not the box! I'm happy I was able to see it 'cause I sure didn't see the break in myself :)
@glennmelven3414 3 жыл бұрын
An hour long video means the sudoku is out of my league. I will just watch.
@eatdirtmofo 3 жыл бұрын
Often my internet freezes, and I keep watching thinking Simon is in deep thought...'Wow, this is a hard puzzle' me thinks, as I stare along happily, not being able to see anything either to progress, sometimes for minutes, then...nope my bad...internet. Simon has found something that I could spend hours looking at and come up with nil.
@buzzly108 3 жыл бұрын
31:50: "Out of nowhere," neglecting that there was already a 123 triple in box 5...
@TheBiggreenpig 3 жыл бұрын
That poor nine was crying in a corner for ages because it was not noticed.
@brentusfirmus 3 жыл бұрын
I was screaming this at the TV for minutes
@Grikkez 3 жыл бұрын
22:00 Easier way to find odd and even numbers in row 4: Columns 3 and 6 and box 5 include three sets of the digits 1 to 9, so there are 15 odd and 12 even numbers. 24 cells are on the renban lines which are all of even length. So the renban lines contain 12 odd and 12 even numbers. The remaining three cells not on renban lines must be odd. (And row 4 now contains 5 odd digits, so r4c4 and r4c6 are even.)
@inglotto 2 жыл бұрын
I did it the same exact way and was so proud of myself! Thanks to CtC my sudoku skills are improving every day
@PauxloE 3 жыл бұрын
Don't forget to adjust your background image to include the arrow sudoku app (and change the "SIX" to "SEVEN").
@CrackingTheCryptic 3 жыл бұрын
Yes I know I need to do this... but I'm so technologically inept I keep putting it off!!! :)
@Jablicek 3 жыл бұрын
@@CrackingTheCryptic I listened to the podcast yesterday where Mark said you can master anything you turn your hand to. I don't believe the "ineptitude" for a minute.
@MineRoyale. 3 жыл бұрын
@@Jablicek If that's true then Simon will be a top overwatch player in no time, since he said he plays that.
@Kholgarus 3 жыл бұрын
@@MineRoyale. smart doest mean fast, and OW need more speed and reflexe than brain abilities
@zaclaplant3001 3 жыл бұрын
Just wanted to say that I started watching these puzzles earlier this year. I knew how to solve basic sudoku puzzles, but didnt realize there was a community of extremists. After watching some of these, I bought your Killer and Sandwich apps (though I think I'm lacking the structure to start complex Sandwich sudokus), and have even been attempting these puzzles provided by the links in the description. Thanks for those! They take me quite a bit longer and I've only gotten a few of them, but I'm infatuated with the intricacy. I'm hoping that by the time I move to the remote Italian mountain-countryside (~2 years) that I'll be well-versed and experienced enough to submit puzzles on my own and spend my free time, of which I'll have plenty, setting puzzles.
@THuk44444 3 жыл бұрын
Extremists usually end up holed up in the mountains where it's much harder for them to get taken out
@PuzzleQodec 3 жыл бұрын
Unbelievable how you just solve this out of nowhere and find the key ideas within 20 minutes. Fantastic!!
@susanne5803 3 жыл бұрын
Thank you very much for a brain rollercoaster!
@PuzzleQodec 3 жыл бұрын
@@susanne5803 You're very welcome!
@ericpraline1302 3 жыл бұрын
If it's any consolation, it took me a lot longer! Thanks for a great puzzle.
@Nick24ever 3 жыл бұрын
Please don't apologize for long videos! It's amazing to watch your processes. Both of you make us feel like we are right there with you. I will admit to sometimes yelling out loud where to put a digit. And unfortunately being wrong half the time. Lol
@guilded0n3 3 жыл бұрын
The ability to break into these puzzles you have is sublime and scary at the same time. I shiver in awe of you and the people who make these puzzles up.
@andreasvox8068 3 жыл бұрын
"That's basically how I dance" - priceless!
@conexant51 3 жыл бұрын
I guess you have an "odd" brain then. ;)
@tabularasa0606 3 жыл бұрын
He's dancing the drunken giraffe.
@simoncoolhand 3 жыл бұрын
Easiest way to get what it took Simon more than 10 minutes to work out, is to say that the cells he highlights in green are all on lines, all those lines have either 2, 4 or 6 cells, so have equal numbers of odds and even digits. So as the greens and pinks are 3 sets of the digits 1-9, the three pinks have to be odds (the three odds that make up the difference between 12 evens and 15 odds in 3 sets of 1-9).
@Ratzfaz 3 жыл бұрын
Why easy if complicated is another option ;-)
@elvishamblin185 3 жыл бұрын
i saw that too
@pascalhaering 3 жыл бұрын
Yes that's one of the worst "shouting at the screen" I've ever done. ;-) I stared at a blank puzzle for half an hour before watching the video, so I'm highly impressed how quickly Simon found the right ideas at the start. But once that "H" was coloured, it took me less that 30 seconds to know that the three purple cells are odd. Still didn't manage to finish the puzzle after that though...
@xevron 3 жыл бұрын
Simpler breakin: If you look at the "H" at the beginning, it contains only even length lines. That means there are equal numbers of odds and evens on the lines. We know there are 3 sets of 1-9 in the H, which means there are 3 more odds than evens... therefore the 3 empty squares are odd.
@craftyraf 3 жыл бұрын
I was thinking exactly the same thing!
@Moolers 2 жыл бұрын
I just started with parity in the middle box and never drew up the H at all. You can still figure out where the 8 goes, as if you put it on the other line, there will be no place to put the even digit above it in column 4.
@MrKlokwurk 3 жыл бұрын
34:50 🎵 Four five six, seven eight nine 🎵 🎵 Is what belongs on this renban line 🎵
@PauxloE 3 жыл бұрын
40:48 "The lowest [c9r5] can be is a 5, if [c9r7] is a 3, and the highest [c9r5] can be is a 6, if [c9r7] is a 5" - but can't we also have a 5 in c9r5 with a 6 in c9r7? (I.e. c9r6 should be 356, not 35 here.) (It gets resolved at 44:41, because the 7 forces the 6 onto the renban line in c9r9.)
@PH34RB 3 жыл бұрын
Thanks!
@Crocodile_Appreciator 3 жыл бұрын
Yeah, I was bracing myself for him to break the puzzle, but luckily, that deduction didn't really matter, and the 56 pair in box 6 was more important. Phew
@TheBiggreenpig 3 жыл бұрын
@@Crocodile_Appreciator I always prefer a break instead of a lucky guess :D
@ThelsdeKwant 3 жыл бұрын
Yeah, I noticed that too. Luckily it gets resolved later. If it did end up being a 6 rather than the 3 or 5, I wonder if we'd have seen this video to begin with?
@mbakenemdusink9757 3 жыл бұрын
I noticed that as well. Or better, I wondered for a while why it couldn't be a 5, but couldn't figure out why...
@msx80 3 жыл бұрын
Watching Simon extort facts from such a blank slate was majestic
@sanfransam8954 3 жыл бұрын
I no longer have to worry about hour long solves. I can play the video at 1.5 normal speed and Simon still sounds perfectly normal. ;)
@abigail5762 3 жыл бұрын
I ended up spending the whole video singer “Mr. Reban, bring me a three. Make it the largest, that I’ve ever seen” (To the tune of Mr Sandman)
@Juice_Gone_Wild 3 жыл бұрын
Considering how absurd the break-ins have been recently...do you prefer "difficult" or "elegant" break-ins?
@stevepinard5826 3 жыл бұрын
Solved it without using parity, so I don't think it is necessary. Something about how the column 3 lines "poke into" box 5, and where do the 4-5-6 go in column 3, and maybe 9. My brain is fried after that one, so I don't remember the details.
@alexisatuatara570 3 жыл бұрын
I might have to get a patron just for next months hunt. I just finished the collection of Hitchhikers books today, the hunt is too much of a coincidence for me not to spend a couple bucks to try the hunt
@samus88 3 жыл бұрын
I have no idea how I didn't know this before, but I just found that your Sukodu apps are for PC, on Steam! Just got the bundle, guys. Thank you so much.
@ruokothyan7658 3 жыл бұрын
there is a bundle? didnt knew that, i will check that out
@samus88 3 жыл бұрын
@@ruokothyan7658 Yes, all seven apps. Classic, Killer, Thermo, Chess, Sandwhich, Miracle and the new Arrow app. I think it's 10% off for the bundle.
@bigboytimy__9536 3 жыл бұрын
Before watching this guy I didn’t even know what a sudoku was now I can’t stop watching him
@ThePlapie 3 жыл бұрын
I appreciate the single odd digit clue, which is clearly meant to guide the solver towards thinking about parity. Nice touch.
@PuzzleQodec 3 жыл бұрын
Thank you!
@wellshoot 3 жыл бұрын
Something I’ve just noticed is that the dancing renban man (plus the 3 other important gaps) takes up 27 squares, the number that qodec has helpfully given us at the bottom!
@amoswittenbergsmusings 3 жыл бұрын
Wow! If that was Codeq's intention, it adds another layer of genius to this already cosmic puzzle.
@ruths.5544 3 жыл бұрын
Well.. Simon I definitely don't belong to this circle of people who are able to solve any of these, but I've sorta subscribed to you guys because you're a lovely soul and you truly appreciate these setters. You're so generous with your love for them and you're extremely humble too.
@bertbergers9171 3 жыл бұрын
Oef was thinking very hard if you made a mistake in not putting 8 and 9 as an option for r5c9 (bout 40+mins into the video), but now i finally realise the square is on the renban line with the 4 so 8,9 are impossible there. Great job finding that break-in and finishing is an achievement on it’s own!!
@Grikkez 3 жыл бұрын
Interestingly, the grey cell (the head of the dancer) is not needed to solve the puzzle. Still it is aesthetically pleasing (and clues one in on parity at the start of the puzzle).
@mandokelteir2376 3 жыл бұрын
I think I have something this time ! At 27:29 In line 4, we know there is 2 more Renban lines that contain one odd and one even number. They cannot contain an 8 or 9. The left one cannot be a 1/2 or 2/3 because of the pencil marks. Cannot be a 3/4 or 4/5 because of the 4 in the box. So it's either a 5/6 or a 6/7. So there is a 6 in any cases, therefore, the 46 double in box 5 becomes a 4 !
@Playmaker6174 3 жыл бұрын
Another hour long epic battle... but honestly this puzzle is so breathtakingly good it's worth every seconds trying :)
@pedrobluis 3 жыл бұрын
First puzzle started before the "Let's get cracking" I believe.
@nishanthn4927 3 жыл бұрын
A year ago if you had asked me can you solve an hour long puzzle, I’d have said not in a million years... but here I am solving them... 😬
@kimberlypreston6204 3 жыл бұрын
I love Simon's smile. :)
@amoswittenbergsmusings 3 жыл бұрын
Only his *smile* ?
@biupSquid 3 жыл бұрын
Absolutely exceptional puzzle, and a really beautiful solve. I'm always amazed at how easily you both make sudoku set theory look when identifying those sort of break-ins.
@matteopascoli 3 жыл бұрын
This video is the perfect length and distraction while I wait the dough for my Focaccia Genovese to rise 😝
@GoMeditate 3 жыл бұрын
Lord help me, I love videos where Simon really has to dig deep, but at the same time, those puzzles are so out of my league! At least I know I dance like Simon :)
@robingrimm3443 3 жыл бұрын
Have I spent ten minutes going ‘color the eight-nines’?? Maybe. I may not know how to do complex sudoku but I do like colors
@DukeBG 3 жыл бұрын
You may ask yourself, what goes on inside the head of the renban dancer? What kind of thoughts does such a dancer have? We know the answer, though. One goes in the head of the renban dancer (48:44)
@mollberg3501 3 жыл бұрын
Another absolutely amazing puzzle by Qodec! I was wondering how I finished the puzzle faster than Simon: his hunt for parity explained it. Oh, Simon...
@nightjarflying 3 жыл бұрын
If parity wasn't the path - what was your 'break in'?
@mollberg3501 3 жыл бұрын
@@nightjarflying 4:4 can't be 4,5,6 which are already locked in other cells in box 5, nor 1,9 since the digit has to repeat on another line, nor can it be 3,7 as that would force the line below to end in a 4 or 6 inside box 5, which again are already locked in elsewhere. So only 8 remains. And the cell below becomes a 1 or 3. I don't know what the intended path was, but Simon spent fifteen minutes chasing parity to reach a point I got to in about one. I never, except on very rare occasions, solve a puzzle faster than Simon, so I'm thinking he took an unintended, if more scenic, detour.
@ericpraline1302 3 жыл бұрын
So clever. Needed a nudge from Simon as had considered polarity but not taken it far enough.
@admthrawnuru 3 жыл бұрын
I finally did it! I beat you to the first digit by about 10 seconds! Then I got stuck, but this is still a big deal for me.
@EagleRiverElectronics 3 жыл бұрын
Qodec: Look at this puzzle that I made that needs absolutely nothing but Renban lines to solve! Someone: Kinda looks like a dancer with no head. Qodec: I'll give him a head then! Someone: But you don't need that odd circle clue to solve the puzzle? Qodec: Dancers. Have. Heads.
@PuzzleQodec 3 жыл бұрын
EXACTLY
@PuzzleQodec 3 жыл бұрын
(Oh for the record, I'm Qodec.)
@amoswittenbergsmusings 3 жыл бұрын
@@PuzzleQodec So, was the head a parity telegraph? And was the choice of 27 deliberate to draw attention to 3x9 sets? And huge thanks for the cosmic puzzle.
@PuzzleQodec 3 жыл бұрын
@@amoswittenbergsmusings Partly (but theme was definitely more important); no not at all, they're there to force the 8 in r4c4 and 7 in r4c7; you're very welcome!
@smylesg 3 жыл бұрын
At 48:12, Simon finally realizes the gray circle cell cannot be a 9, which he could have known since 27:19. That's almost 20 minutes with the 9 sitting there. Is that a new record?
@joewatson8782 3 жыл бұрын
The lines remban lines were already fixed by the given 7 at the time of your break through. 7 could only go in the bottom cells of the middle cage so forcing it to be the high line.
@geo-fry6372 3 жыл бұрын
Really fun solve. This one took me a couple of hours (I was trying to multitask through a good bit of it), but I'm still really happy I solved it on my own. I caught on to the logic path very quickly, it was just a tad difficult to stay on the path.
@nishanthn4927 3 жыл бұрын
41:00 r7c9 can be a 6 as well!
@alienrenders 3 жыл бұрын
68:20 for me. That was a tough one. Didn't think the bands in box 2 were worth looking at too early so I got stuck for a really long time until I decided to finally look at it. Was still tricky. Really nice puzzle. Haven't seen this kind of puzzle before. edit: While I find what Simon did with parity impressive, there's a ridiculously simple break in. I mean, it's stupid simple. I kind of feel bad for Simon because he's gushing over the break-in and umm... it's basically as simple as take door #1. You already know that 456 is in box 5. So the two cells in box 5 that are connected to bands in column 3 can only be 13789. Call these cells A and B with A at the top. Whichever of AB has any of 789 must have 6 in its band. Neither A or B can be 2 or 4 and the other band MUST be from 1 to 5 and only has one degree of freedom. So 234 must be on it. So in column 3, in the top two bands, we know there is 246. So the bottom two cell band in column 3 cannot contain 2, 4 or 6 (and thus can't contain 1, 3, 5 either). It must be from 789. So there's an 8 on it for certain. Hence A must be 8. It can't go in B because B needs to appear in column 3 in r4c3. The band lines won't allow it to go anywhere else. Now that you know you have an 8 in A, then at least 67 must be in column 3, so the bottom band is 89. Now that you can't use 9, the upper band must be 567(8). Since 5 can't be used in box 5 or in column 3 for the other band, the other band is limited to exactly 1234. Really, all this amounts to is what digits can I not use in box 5 that must go on the top two bands in column 3 and then look at its effect on the bottom band. That's it. That's the break-in. While this may take several sentences to describe, it's stupid easy to see when actually solving and you see it visually.
@amoswittenbergsmusings 3 жыл бұрын
Things that are indeed stupidly simple once you realise them, are among the greatest discoveries of the human mind - to wit, the constant velocity of light in special relativity or the equivalence principle of general relativity were hiding is plain sight but it took uncle Albert to notice them. The principle of least action was known for a few hundred years and turned out to be key in quantum dynamics. Who knows what glaringly obvious fact is staring us in the face right now? Deep Thought cold come up with the *answer* to Life, the Universe and Everything in a mere 7.5 million years but we still don't know the question. Simon says it all the time: "We have to ask the question XYZ" and *then* the answer which was there all along, forces itself on us. In praise of stupidly simple things...
@alienrenders 3 жыл бұрын
@@amoswittenbergsmusings Sure, but Simon often gets caught because he refuses to look at what digits a cell can hold. He did it again later when he wasn't looking at the two cell band in box 3.
@amoswittenbergsmusings 3 жыл бұрын
@@alienrenders True. Your comment is utilitarian, mine was philosophical. Looking at things in non-obvious ways can lead to startling new insights. If we all stick to the "normal" perspective, we _may_ miss a ore enlightening angle. I think we need both approaches. Mark and Simon tend to gravitate to those two poles. The combination, unapologetic and with strong bonds of friendship, clearly makes for a very appealing channel. Gains all around and only modest compromises.
@alienrenders 3 жыл бұрын
@@amoswittenbergsmusings I think you're making too much of this. It's just sudoku. Simon is human and if he had seen a simpler way he would have done it. There are always new things on this channel so when things get unnecessarily complicated, it takes away from the usefulness and enjoyment of the channel.
@amoswittenbergsmusings 3 жыл бұрын
@@alienrenders I accept your criticism of my overanalysing this. I tend to do this. Let's put it this way: that's part of what fascinates me so much on this channel, this opportunity to meta-think things through. You are looking at the same thing very differently and that is supercool with me. I suggest you just ignore my comments. That is totally fine.
@petehevans 3 жыл бұрын
It was resolved just a little later but at 41:00 surely he should also have pencil marked a 6 in r7c9 along with the 3 and 5?
@susanne5803 3 жыл бұрын
40:40 Simon: "That's almost Bobbins-worthy as well!"
@mostman 3 жыл бұрын
31:50 - Narrator: It wasn’t out of nowhere.
@jaega4247 3 жыл бұрын
Sometimes I feel like Simon's explaining is like listening to an astrophysicist. Absolutely astounding, but makes my head spin after the first three sentences. I broke into this one using odd and even numbers with the help of columns 3, 7 and row 4, rather quickly coming to the same solution as Simon as he placed the 8 at 22:53. But then it'd still take me hours to clear the whole thing though, while Simon basically walked right through it. Once again, the astrophysicist mindset wins over the simple one in the end.
@shadowoftime3627 3 жыл бұрын
Another way you could have narrowed down r4c6 to at first a 4,5, or 6 is that r4c7 forces it to be. Since that cell sees all the cells in the top line going down column 7. So that cell can only appear on the bottom line of that column but in the center box when it turns off. And r4c7 can't be 4,5, or 6 because it would break the top line. Which in turn puts the forth digit in those cells you marked in box 5 for 4,5, or 6 in the bottom of it. Making the top left corner of box 5 in r4c6 to only be out of 4,5, or 6.
@cauchym9883 3 жыл бұрын
34:51 "4, 5, 6, 7, 8, 9 is what belongs on this renban line". I think you should do a sudoku solve just using rhymes at some point. 😄
@robertbarnes2598 3 жыл бұрын
cells with a grey circle are odd was a great clue imo
@MikoKisai 3 жыл бұрын
I had a fairly different solve path for this one which didn't really rely on parity. (It does, however, rely significantly on a ton of pencilmarks, but that's just how I do puzzles.) In box 5, you can easily determine that the 4, 5 and 6 have to go in the cells 6-digit renban lines. However, it's also the case that any 4-digit renban line must contain at least one of those digits. Since R4C4 and R5C4 cannot contain any of those digits, you can deduce that the 4 and the 6 has to be split between the two 4-digit lines that enter C3. This greatly limits the possible permutations for those lines, which in turn limits the 2-digit renban line at the bottom, etc.
@janeflett4971 3 жыл бұрын
I did it this way too
@dontmindme2844 3 жыл бұрын
I started the same way he did noticing 4-6 were forced into box 5, but I noticed that in column 3 that if the 4 length renbans overlapped, they'd shunt a 4,5 or 6 into box 5 which doesn't work. If they were 1-4 and 6-9, same problem because to make the 2 cell renban work it would shunt either a 4 or 6. Thus, the only way was either a 1-4 & 5-8 or 2-5 & 6-9 but the latter shunts a 2 into column 4 which conflicts with the given digit. Meaning a 8 was shunted into column 4 and it was 1-4 & 5-8. Got the 8 shunted from the upper renban because the shunted partner had to be the same as the empty space.
@fulltimeslackerii8229 3 жыл бұрын
I could never do this puzzle cuz I keep wanting to treat this as a thermo puzzle
@Swisswavey 2 жыл бұрын
I found that very challenging. I did it though, and feel very smug about that. It took me 100 minutes though. Don't care, finishing it was good enough for me. Thanks for the puzzle.
@exotericidymnic3530 3 жыл бұрын
very clever to place an odd circle to make the solver think about evens and odds.
@amoswittenbergsmusings 3 жыл бұрын
It's called a telegraph in the setters community, I think.
@bobblebardsley 3 жыл бұрын
27:18 Am I right in thinking r4c3 and r5c4 must be the same exact digit? The digits on the vertical renban lines in column 3 can't repeat in the column and the digit in r4c4 can't repeat in the row so the only digit that can appear in r4c3 is by 'straightening' the dog-leg from r5c4. I think. No idea if it would speed up the solve though and I'm probably wrong somehow. 28:16 ...oh never mind
@TabAtkinsJr 3 жыл бұрын
Oh phew, actually grabbed a deduction ahead of Simon, a rarity for me. Around 28:00, when the orange in c3 is penciled as a 13, you immediately know it's a 1 because a 3 would break up the other renban it's interacting with. A bit ofc easy sudoku interaction with box 5, and that ends up solving that 2-5 renban entirely and grabbing you another digit or two elsewhere.
@TabAtkinsJr 3 жыл бұрын
Whoops nope I'm wrong, Simon wins again.
@neokart2660 Жыл бұрын
1. I inferred the 8 at minute 22:53 in a different way: if the 2 Renban lines (RL) share a digit, it cannot appear twice in c3, then it is in c4, that is, in box5. But the digit they share must be extreme towards the center of the RLs, that is to say 4, 5 or 6, but since there cannot be more 4, 5 or 6s in box5 then the conclusion is that the 2 RLs do not share digits. Therefore the digit r4c4 can only be located in c3 in the RL r89, therefore r4c4 cannot be an extreme (1 or 9), because (2 or 8) would have to appear in box1c3 and in r89c3, neither (3 or 7), because (2,4 or 6,8) appear in box1c3 (in the case 3, 4 is obvious that it appears; if 2 does not appear, then 1 and 2 are left out of both 4-RL, which contradicts that contain 8 different digits. Analogous is the case with 7.) and (3 or 7) would no longer have a partner to be the RL r89. Having already discarded 4, 5 and 6 from the start, r4c4 can only be (2 or 8) and cannot be 2 by sudoku, therefore it is 8. I am fascinated by the Renban-ian symmetry that allows me to discard digits that add up to 10 at the same time. 2. It took me a long time to solve the puzzle, but while I was thinking I got this: Each RL of length 6 has a sum that is a multiple of 3, because they are all 1,2,3,4,5,6 (sum 21) with all 6 digits increased by "n", therefore the sum increased by 6n, also divisible by 3. Therefore, since 45 is a multiple of 3, subtracting column 7 from the two RLs I concluded that r6(c4+c5+c6)+r4c6 -r4c7 is a multiple of 3. In the future, knowing that r6(c4+c5+c6)+r4c6 are 4+5+6+7 directly gave me 7 on r4c7. This is not that impressive since (as you show in the video) you could reach that conclusion much easier, but it's funny that when solving it I just instantly thought of that divisibility by 3 that I had concluded earlier when I didn't know how to proceed with the puzzle. Greetings and thanks for these videos.I am fascinated by the Renban-ian symmetry that allows me to discard at the same time digits that add up to 10.
@mackthisarrowhearth295 3 жыл бұрын
40:58 - dangerous pencilmarking, the cell in the 9th box could also have been 6 at that point
@PathOfShrines 3 жыл бұрын
Great puzzle. I completely did not get the break-in; I did not see how to make parity work, and maybe next time I will. Once I followed Simon through that bit, I got the rest easily enough, but oof.
@Gorillaphoenix77 3 жыл бұрын
PI is exactly 3!! Also watching you play sudoku is intense. I thought I was good cause I could do "hard" level sudoku, and even then that was with a lot of pencil marks and trial and error.
@abhisheknanda85 3 жыл бұрын
At 41:00, r7c9 could've also been a 6?
@abhisheknanda85 3 жыл бұрын
Oh well, it gets resolved based on the logic at 44:48
@BigAsciiHappyStar 3 жыл бұрын
@@abhisheknanda85 I spotted that as well and waited for my schadenfraude moment, but not to be sadly :(
@luketurner314 3 жыл бұрын
About the Sudoku podcast, (1:38) "and we'll keep going for as long as you guys say that we should,": Don't Stop by Foster The People starts playing in my head
@antonyduhamel1166 3 жыл бұрын
I know I'm the only person who wants this on this channel, but I would pay every last spare dollar I have to see Simon go play Guess Who with the Vanoss Gaming Crew. If only because we'd finally get the chance to hear Simon yell "SUDOKUUUUUUUUUUUU!!!!!" at the top of his lungs.
@amoswittenbergsmusings 3 жыл бұрын
This was an X-rated solve. Codeq initiated a lengthy foreplay tickling all Simon's erotological zones with variegated teases, going every which ways in Simon's cortex and that made the climax a true explosion of pent up numericolibidinous energy. I almost felt it was indecent to watch. I found it remarkable how often Simon used language with cosmic overtones: "What do we know about the world?", "Can we know anything more? That is the question..." Since I am neither a particularly good or even average solver, nor anywhere near a setter, my relationship with upper-stratospheric sudoku will remain platonic for the foreseeable future. It is better than nothing. I've said it before and I'll say it again: Simon, I love you, platonically.
@Coyotek4 3 жыл бұрын
For various reasons, I couldn't even attempt this puzzle until long after it got posted. Not that I got anywhere once I *did* try it; I gave up, looked through the comments, saw how to start, and STILL got nowhere. Too tough for me.
@collectorkeebler280 3 жыл бұрын
31:56, finally placed the 9 that could have been placed a while before due to the 123 triple in box 5.
@darreljones8645 3 жыл бұрын
Useless fact: "Renban" spelled backwards is "N. Abner".
@lizbrooker4635 3 жыл бұрын
I saw it as ‘banner’. Funny how our minds work...probably why we love this channel😊
@amoswittenbergsmusings 3 жыл бұрын
Fun fact: Abner was one of king David's opponents, later allies, in the early days of his kingship after king Saul had died in battle. In Hebrew his name is אבנר בן נר [Avner son of Ner, or N.Abner]. The translation of these names are 'father of light' and 'light' respectively. This puzzle was really very enlightening. C.G. Jung might have said something deep - or merely *sounding* deep, depending on your perspective - about this linguistic resonance. Then again, in Ramsey theory we learn that random arrangements inevitably start to show patterns as they become larger. That in return may or may not "tell us something about the world", to quote Simon in today's lecture - or sermon.
@stacirosen6529 3 жыл бұрын
simon is truly adorable
@amoswittenbergsmusings 3 жыл бұрын
He is.
@dimensionalremi 3 жыл бұрын
great title, but trust me, i did not go into this video thinking i understood sudoku
@bevc5277 3 жыл бұрын
hi, ive been playing your apps. i was wondering if you could put out a short video explaining how to decipher the hints. and how the columns and rows are numbered. this would be a great help
@RichSmith77 3 жыл бұрын
Columns and rows are usually numbered from the top left corner, abbreviated to r for row and c for column. E.g. r2c4 means second row down from the top and fourth column from the left. Hope this helps.
@DanielSloane 3 жыл бұрын
Solved in 77 minutes. I love this type of solve - after 15 minutes it still looked impossible, then I doubled down and found the break-in. Now to watch the video! Edit: Oh crazy, I solved it without thinking about parity at all. My break-in was just considering where R4C4 could go in column 3 (not on the rest of its renban, not R4 by sudoku, and not R5,R6, or R7 because with 4,5 and 6 already claimed in box 5, R4C4 and R5C4 must be one high and one low digit to avoid having their respective renbans share digits. Therefore R4C4 repeats in the R3C8/9 renban). Then where is R5C4 in column 3? Not on its own renban, not on R4C4's renban for the aforementioned reason, and now not on the bottom renban. It must be in R4C3. Now a quick playing of the possibilities shows that the only digit possible in R4C4. Everything else is an 8 would isolate or repeat a digit in column 3.
@Paolo_De_Leva 3 жыл бұрын
Thanks for sharing your alternative path
@Danny-no2zp 3 жыл бұрын
Well done! That’s very tricky.
@MyriamTT 3 жыл бұрын
Great puzzle ! Great logic.
@uncgoalie 3 жыл бұрын
I am glad I gave up trying it myself after 10 minutes... i got the 456s in the center restricted and for all else I enjoyed the video...
@milliams 3 жыл бұрын
That puzzle is classic Qodec
@donatello_8691 3 жыл бұрын
I believe it means, the dancer is an oddball
@arthurthekyogre9155 3 жыл бұрын
Mr. Simon Man is now officially Simon's superhero name
@dvolokita 3 жыл бұрын
Most videos give me a chkle or tow... this time imaginings simon dance.. Loughed out loud
@ThelsdeKwant 3 жыл бұрын
Does the Gray dot serve a purpose? At 48:25 Simon figures out that the 1 goes into the Gray dot using logic other than the Gray dot. It did not seem like the Gray dot was used at all before then, and it's obviously useless after.
@legobil_ 3 жыл бұрын
In the beginning of the video, when you marked the H-pattern, you counted the parity and number of odds and evens for those 3 sets (2 columns and 1 box - none of which overlap) I found it useful to think of the total number parity in those sets, ie all three sets has 15 odd numbers and 12 even numbers, and as such I don’t think the purple cells could be anything but odd. But maybe I am wrong? Any counter proof?
@PuzzleQodec 3 жыл бұрын
(Qodec here) Actually, that was the exact idea based on which I designed the puzzle, and your reasoning is perfectly valid. What I also did was to try and make this accessible by using clues which allow a solver to discover this fact gradually. So I expect that most who solve the puzzle take this more indirect approach. And my hope then is that people become aware that this logic exists, and create beautiful new puzzles with it. :-)
@annesorensen4004 3 жыл бұрын
2:23 in to the video... June theme for the puzzlehunt on patron - hitchhikers ... 🤩🤓 but naturally... 🧐I just wunder how you knew i was turning 42 in June 🤪🤪
@katam6471 3 жыл бұрын
A very good video to go with breakfast on a Saturdays morning! What better start of a weekend can there be?
@yajibei 3 жыл бұрын
1h long vidéo ? Let's see where he discover his first number *pass the mouse on the bar to have the mini screen* 23 minutes and a lots of marks+colors ? oh boy, it's going to be a nice video !
@leporid257 2 жыл бұрын
I *really* love the idea of the tshirt but idk if a shirt with a big 45 and just "The Secret" would get you far where I'm from. is there context on the front?
@ragnkja 3 жыл бұрын
Simon is apparently about as good a dancer as I am 😆
@EricNalbone 3 жыл бұрын
This reminds me that the best video comment (maybe ever) identified gray circles and odd balls.
@_Lynnteressant_ 3 жыл бұрын
This was such a delight!
@roiljelly6255 2 жыл бұрын
This was an amazing puzzle!
@nikoyochum6974 3 жыл бұрын
40:56 why can't the other cell on this line be a 6?
@countknersis700 3 жыл бұрын
If you watch cricket and it is being played at Lord's Cricket Ground or Newlands and the run rate is 2 average after the third day, you can be sure that the commentators have run out of words to say. The batsman (solver) is doing his best to the ball he is receiving from a determined bowler (setter). Then again we only see the 50's and the 100's. Simon said so himself. This a highlight channel that we all adore passionately no matter what.
@amoswittenbergsmusings 3 жыл бұрын
You lost me with the cricket analogy but I have lived in the UK only for some 37 years so I have not yet absorbed enough of your quaint passions. That being said, the passionate admoration is smack bang bull's eye. Darts and snooker are easier for bloody foreigners. This video was in the One Hundred and EIGHTY bracket. Total clearance, Ronnie Sullivan style.
@nicolasstraccia 3 жыл бұрын
34:51 4 5 6 7 8 9 🎵 is what belongs on this Renban line 🎶
@srwapo 3 жыл бұрын
@48:25 Did you place the 1 in r3c5 without actually using the odd digit constraint? None of the logic used to lock 1 into that cell required that constraint. I'm not sure that constraint was used at all in the solve after the initial penciling in of the candidates, which themselves didn't matter to anything.
@Zooobly 3 жыл бұрын
31:53 when Simon said "that square has become a 9 out of nowhere" I was like... No. you could have made r4c5 a 9 the same way/at the same time as you made r5c3 a 4. honestly kind of inconsequential and honestly I couldn't even have broken into this puzzle but for some reason these kind of things I always seem to pick up on immediately
@ragnkja 3 жыл бұрын
I often see additional ways to get more information out of logic he has already done, and get frustrated when he moves on without using his own work to its fullest potential.
@Sujisan4 3 жыл бұрын
I love these videos.
@ShaShuKeSiu 3 жыл бұрын
What an amazing channel!
Diana Belitskay
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