Pro Sudoku: Can You Place One Correct Digit?!

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Today's puzzle features one of the great break-ins in sudoku history. Simon is utterly flummoxed for some considerable time! If you can get one digit, you can probably get all of them :). It's called Squares and it's the creation of the magnificent udukos! Give it a go at it at the link below:
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Опубликовано:

26 сен 2024

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Комментарии : 346

@xaviarthunders4894 3 года назад

What a brilliant solve by a brilliant man. However... having said that... Simon is the only man I know that calculates how many cows there are in a field by counting all of their legs and dividing by four.

@ragnkja 3 года назад

After first checking that they all have four legs each, naturally. And to be sure, he counts the ears and divides by two as well.

@BlackLegVinesmokeSanji 3 года назад

No each ear and leg ÷ 3 then ÷2

@Wildhorn666 3 года назад

But first he will check the shape of the field and if the maybe-cows align with the fences

@andrewnelson2525 3 года назад

Why would you be given that cows have four legs each if you weren't meant to use it?

@alanfuller4278 3 года назад

but just the purple and green cows

@bearcubdaycare 3 года назад

When Simon misses something that I happen to notice, I start trying to figure out what it is he is looking at, as I suspect it's a key to why he sees stuff that I don't. What I see might resolve a digit or two or a pencil mark or two, while what he sees moves the puzzle along in bigger strides.

@jsharvey1961 3 года назад

Exactly, I try to do the same. The 9, 6, 7 in row eight (I think it was row 8) was apparent for a long long time before Simon noticed it, and the 9 by itself several minutes before that. But all of the other stuff he did in that span was mostly beyond me.

@thehumanpractice2985 3 года назад

The key is that there are layers of information. Some more punctual, some looking at a bigger picture. When there are additional rules, these adds different ways of thinking. Due to experience, practice, and overall proficiency, SImon easily spots the layers and switches from bigger picture to details fairly faster. It's like in chess you could be calculating moves based on the bishop and rook, but miss a knight's move because it was on a 'different layer', a different pattern.

@drainar 3 года назад

I just spend 10 minutes irritated ans screaming at my screen for 1 digit i found, while he fixes half of the puzzle

@rachmawansaputra2491 3 года назад

@@drainar right? i just scream nine in lower columns because sudoku rule and he just clear half of the puzzle number i don't even know... and now here i'm testing playing sudoku stuck at hard

@Poet13xRatedRKO 3 года назад

After 7 minutes I discovered that I have a 50% chance of placing digit 1 correctly in box 8.

@stevenape377 3 года назад

I think it's courageous to do these live solves and have people comment about the inevitable little things you miss. I'm blown away as always by how quickly you get to the heart of the matter, and explain it too!

@longwaytotipperary 3 года назад

Amen!

@michaelsouto6917 3 года назад

Thanks again Simon for another beautiful solve. Please don’t be so harsh on yourself, we hate to see you like that. You’re an absolute genius, and I would have never found that break-in given an entire day and a hint. Don’t listen to the mean people!

@nilsp9426 3 года назад

"Can you place one correct digit?" - Sure, I will just put 1 in every square.

@Coyotek4 3 года назад

Nine correct digits!

@kyawlinthan1415 3 года назад

@@Coyotek4 Eight* because one of the 1s is given!

@bothieGMX 3 года назад

@@kyawlinthan1415 Place 2 in every square, then you got 9 correct ;)

@zoruaak 3 года назад

I made a cat, did I win?

@elliotbaker5416 3 года назад

A broken clock is right twice a day, and a sudoku with the same number in every cell has 9 correct digits

@Rangsk 3 года назад

The placement of the 1s and 9s on the renban are like a 3x3 sudoku within the larger sudoku! My mind is blown!

@KiraBox1001 3 года назад

"but even blind squirrels find acorns". lol. I can't even find my light switch in the dark

@longwaytotipperary 3 года назад

LOL!

@s.k.fantoni4640 3 года назад

It's definitely a quote I'll be using at some point lol

@barneytrubble 3 года назад

Simon: I know you'll all have got very cross with me about that. No, it was very funny, and you made me chuckle a lot. These videos are very entertaining sometimes :-)

@longwaytotipperary 3 года назад

Always very entertaining!

@ragnkja 3 года назад

We get amused, and sometimes exasperated, but cross? I certainly don’t get cross with him for not spotting something, and I’ve not seen anyone else say they do.

@hannevanderven5230 3 года назад

Not gonna lie I got cross but then he was embarrassed and I felt really bad

@mycroft64089 3 года назад

"This was a complete red herring." Simon, please, it was clearly a purple and green herring.

@yovliporat8608 3 года назад

My exact thoughts

@andrewgrant6516 3 года назад

Rainbow trout.

@StorymasterQ 3 года назад

@@andrewgrant6516 As someone who reads Advice and Trust, the phrase is a delight to see, even in a different context :)

@bdemaree 3 года назад

38:56 sums up so much of my solving process. "I can't remember why...just trust my pencil marks"

@Sujisan4 3 года назад

Take a bow udukos. What a beautiful puzzle.

@garanceadrosehn9691 3 года назад

Yesterday I almost remarked that puzzles with Renban lines seem to come easily to me. I actually finished yesterday's puzzle about as fast as Simon did, and was quite pleased with myself. And then today's Renban puzzle comes along and I'm totally clueless as to how to even start solving it!

@Spoof10 3 года назад

So it's basically a renban swordfish.

@gordysgames1440 3 года назад

I thought the same thing

@AdventCloudStrife 3 года назад

It's like a weird kind of meta-sudoku, where you treat a 1-2-3-4 quadruple square as a "square" in suokdu, and can' have them appear more than once in a "row" or "column". Likewise for 6-7-8-9. Genius.

@balkthor 3 года назад

Instantly seeing the 456 triple in the box 7 renban at around 36:00 makes me want to scoop Simon up in a socially distanced consolation hug.

@tangrybird04 3 года назад

“Even blind squirrels can find acorns”😂😂😂😂😂😂😂😂

@Corwin256 3 года назад

35:49 What I love about this is that you are so beyond brilliant that while my simple mind spotted this in an instant, it's just too low and common for you whilst you search for higher, more difficult logic. It reminds me of a comment that I heard that common sense is 'common' and therefore not as widespread amongst the truly brilliant.

@menglish83 3 года назад

I haven't heard that said about common sense before but I love it. I think you've correctly pointed out what many people ignore when they complain about Simon missing simple stuff. He's not looking for simple stuff. He's mastered classic Sudoku. He's intensely focused on trying to figure out the logic that created this unusual puzzle by deconstruction. The easy solves are saved for later when he's lost sight of the bigger picture. I think you'll agree, that is what I love about listening to Simon think aloud. It's a privilege.

@Corwin256 3 года назад

@@menglish83 It really is such a privilege. Not only that, but his absolute delight in just about any puzzle that's any good. (almost every puzzle on this channel). I want my attitude to be more like that in general.

@Zwangsdemokrat 3 года назад

We do love seeing Simon ending up with a completely goodliffed grid.

@GuilhermeCarvalhoComposer 3 года назад

Wow, that was BRUTAL. I managed to solve it all by myself and now I'm going to watch Simon do it so I can see how many obvious and smart things I missed along the (excrutiatingly long) path I took. It's a brilliant puzzle, to be sure, but probably the hardest one I've ever solved without any hints or help.

@waterfrodo4304 3 года назад

34:20 This part must have caused the largest amount of screaming at Simon in the history of CtC.

@Omega_Orion 3 года назад

The accidental absolute avoidance of resolving the 9 and then later the 6 in box 8's renban for twenty minutes is precisely why I keep coming back. As a viewer I get to notice these things easily while you spend 20 minutes resolving everything else despite those digits

@melvinglis991 3 года назад

One of a few sudokus that go on the "Watch again" list.

@philhemstock 3 года назад

I find it amazing that I can so easily pass 3 hours of my day watching Simon solve these puzzles. So chilled and thoroughly entertaining!

@leojs5673 3 года назад

I can, if I fill the whole grid with ones 🤣

@elmerdeleeuw1569 3 года назад

My man, I'd say you'd do a lot better than 1 correct digit. You'd get 9 correct ones ;)

@lutzdoon100 3 года назад

@@elmerdeleeuw1569 though it would be only 8 correctly “placed” digits, since one 1 is given…

@elmerdeleeuw1569 3 года назад

@@lutzdoon100 Fair enough. Still 800% better than 1 correct one placed ;)

@roelrijkens4061 3 года назад

You could fill box 5 with 8's as there is a 1 already given in this box.

@TheRumata23 3 года назад

@@elmerdeleeuw1569 700% better. :)

@donatello_8691 3 года назад

I'm always disappointed in myself for not being at least 1% as clever as Simon

@Kinada 3 года назад

On of the things that Simon seems to have missed is that the break in shows that you must place at least 3 of every digit in to the white squares and after dealing with the 1s and 9s you have no 5s anywhere so the remaining 3 squares MUST contain 5s. The other thing that this does is that 1, 5 and 9 can never go into any of the intersection boxes however all 9 of the intersection boxes are the OTHER 9 digits that accompany the 5s since they all must appear more than 3 times.

@solfeinberg437 Год назад

I realized the 5's had to be in the other renbans (3 of them). And the other 6 5's couldn't go on intersections. 1's and 9's couldn't go on intersections. After that it was fuzzy to me but I never had to think about it. I realized if 1 appeared on a renban in a pair of rows it couldn't appear in another renban on the same 2 rows.

@GrahamRSteele 3 года назад

That was such a crazy, awe-inspiring break-in. I paused the video to marvel at both the setting and the break-in. In my head, Simon was very cross with me* for not seeing it. So good. * not really, he's just too nice and would probably say "That was difficult."

@mmmcounts 3 года назад

I do believe this Simon fellow should do some live solves at some point. All of us would sit silently for a half hour until he gets the break in and then we will have so much to say.

@stevieinselby 3 года назад

I would never in a million years have got to that point, but even so at 35:00 I just have to shout *WHAT ARE YOU DOING?!* when you try three times to put 4-5-6-7 into a box that already has a cell limited to 567 and no other place for a 3...

@Setixir 3 года назад

Happens a lot with me. If I'm doing a high level sudoku that requires some more advanced logic I'll miss the simple crap often enough. I have to remind myself to go back to actual sudoku sometimes.

@ichich3978 3 года назад

Same with the 9 in box 8, this was there for ages....

@ceevio_art 3 года назад

Us: Look at the lovely forest. Simon: I can't see it. All those trees are in the way.

@Tony_Regime 3 года назад

the one thing I could guarantee was that this comment would be here and I could just reply instead of typing it all out.

@matheuscastello6554 3 года назад

this is definitely the smartest break-in i've ever seen in a puzzle, wow!

@joshuagreenberg1301 3 года назад

This has got to be one of my favorite sudokus ever featured on this channel. The cleverness is mind-blowing indeed. Also, keep these amazing renbans/nabners coming :)

@BozoTheBear 3 года назад

What a brilliant puzzle! I didn't get the break-in, but Simon's hint about the maximum number of 1s in those highlighted columns was the only clue needed. Such an elegant idea, and I love these puzzles where the idea is the hero - no need for ridiculously complex reasoning after that.

@UnintentionalFan 3 года назад

When he apologized for not seeing the 3456, I was still crying for the poor forgotten 9 and its younger sibling, 6, in box 8. What a brilliant puzzle though, definitely fit for a brilliant solver like Simon.

@Jodawo 3 года назад

I think the lattice and Box 5 was the key to the break-in of this puzzle. When you figured at least three of the RenBan lines had to have a 1 on it and three had to have at least a 9, Box 5 put a major restriction on how you could set that up. Excluding Box 5 from having a 1 or a 9 in the area where there was no lattice made it restrict the possibilities of how these 1's and 9's could be separated. Finding that break-in was probably one of the most difficultly eligant and unique I have seen on this channel. We have seen many different break-ins to puzzles over the years but for this one to take Simon 30 minutes just to figure out what was going on, is a testament on how difficult and unique this breaking was.

@Coyotek4 3 года назад

I started this late on Friday night, and thought it might end my solving streak. It did not. Finished in a time of 41:45. My method wasn't quite as elegant as Simon's, but I quickly saw how 1s and 9s were getting forced onto the Renban lines and was able to proceed from there. Incredible puzzle; one of my favorites of 2021!

@ericpraline1302 3 года назад

Didn't appreciate the full subtlety of this puzzle until watching Simon's solve, but did at least start in the correct way with 1s, and while at one stage I felt his confidence was missplaced after I had placed one digit but hit a wall for a while, I did eventually solve this wonderful puzzle.

@VeritasUnae 3 года назад

What an absolutely beautiful puzzle, adored the way everything fell out after the renbans revealed their secrets. Definitely a joy to watch you solve it, Simon!

@Pete7396 3 года назад

35:33 figuring out the renban in box 7. Unable to see that 4567 would mean box 7 has nowhere for the 3!

@PauxloE 3 года назад

I had to pause the video here to see whether someone already commented this.

@RKumono 3 года назад

Yes, we're not cross with you...just chuckling at you..

@esonsee 3 года назад

@@PauxloE I did exactly the same LOL

@shadeblackwolf1508 3 года назад

Love how he looks everywhere except the 4567 pentomino when trying to disprove the 4567

@charlesmarlowstanfield 3 года назад

These puzzles are so absurd... can't imagine ever solving that on my own given a full day.

@MattYDdraig 6 месяцев назад

57:30 Incredible elegant simplicity in the layout concealing some wonderful logic.

@jonhansen9622 3 года назад

@ 34:15 Doesn't the 34 pair in box 8 rule out a 3 in box 7, c1? Forcing it in the renban? Edit: He got it! He just used Simon Logic to get there :D

@CheatahX 3 года назад

It is always a bit painful to watch someone who is surely smart enough being on the wrong train of thought. But it does happen to the best of us.

@danielwynalda6700 3 года назад

In fairness he put 4567 in and didnt observe there just wouldnt be a 3 in the box anymore either

@warrenyazzie9975 3 года назад

When he said "Is it really as simple as that?" I thought to myself . o O (No, it's simpler. The 34 in box 8 forces 3 onto the Renban line in box 7 therefore it is 3456) He could have deduced that at 33:09.

@bryanroland9402 3 года назад

35:48 We're all very disappointed too. Actually, you were looking for something more complicated, which is what you'd expect from this puzzle. Very tough break-in. Great solve!

@davidhughes7174 3 года назад

Thanks again for a wonderful solve Simon. Another amazing puzzle which baffled me with its symmetry and logic.

@bristolrovers27 3 года назад

Brilliant puzzle How Simon got the break in was incredible Cleaning up after the break in was typical Simon, do all the difficult stuff but struggling to spot the obvious

@johanneswilhelm4075 3 года назад

Great Sudoku, the 5 follows the same logic as the 1 and the 9. It can also be placed outside the renban squares (and the 18er killercage) only 6 times out of 9 times which are required. Therefore the 5, like the 1 and 9 must be placed in the remaining 2 renban squares and the 18er killercage.

@Swisswavey 3 года назад

That makes perfect sense now you say it. It never occurred to me while solving though.

@pattipesce2001 Год назад

Simon - you are a STONE COLD CLASSIC!!! What a wonderful break in and solve!

@theashen 3 года назад

Solves the most incredible break in. Box 8 “what am I, chopped liver?”

@faladu9991 3 года назад

it will never stop to amaze me how simon misses obvious digits (like the 9 in column 4 row 8 that was the only option for 9 since 28:12 and sits thege for 15 minutes) without it affecting his solve at all. he only seems to miss those that don't do anything

@nickthompson1812 3 года назад

Wow, this is definitely one of the hardest break ins I’ve seen. All I can say is brilliant solve. We had ups and downs, a little fun along the way, but we’ve arrived home :)

@Gonzalo_Garcia_ 3 года назад

Awesome puzzle! What a great idea!! I had to stare at the grid for 15 minutes with no clue at all on what to do before realizing how to get started. I found it pretty easy to keep going from there, but just the idea for the break-in is enough to say this is absolutely incredible. Final time of 34:01 for me.

@jsharvey1961 3 года назад

Wow!

@margaretmcnarry4298 3 года назад

Well done!

@waterfrodo4304 3 года назад

I solved this without using "the lattice" or realizing that there are exactly three 1s and three 9s, but it took me well over an hour. I only used the fact that there can be no two 1234 rensquares in one line; first to exclude 1+6 option for 7-cage in box 6, then to exclude 1+6 option for 7-cage in box 8. Then a couple of times more with 1234 and with 9876 to place remaining 1s and 9s.

@Kinada 3 года назад

So I left this puzzle sit on my second monitor for a while, made dinner, and was in and out and at some point I looked at it and just got the break in. Still took me a while and some stupid mistakes to get it finished but it was a pretty cool puzzle.

@LarkyLuna 3 года назад

Thinking about the properties of a 2x2 line It either has a 4 or an 8, never both. I'll just call it a 4 line and 8 line If an 8 line is in a box, 4 of the 5 missing digits are 1,2,3,4. Then either 5 or 9 are needed to complete For the 4 line you only get 8 and 9 out You can never have 3 of the same type parallel to each other (and they must have at least one different digit) We'll probably see more of this, won't we?

@Borkon 3 года назад

Placing one digit was simple for me, the rest took a bit of grinding to get done since my brain isn't smart enough to spot the logic with 1s and 9s on the lines. In box 8, if the line contained a 4 or less then the 7 cage would break, so the line is either 5678 or 6789, both contain a 6, which means that the 7 cage isn't 1+6 so the 1 is placed.

@BigAsciiHappyStar 3 года назад

but the line could be 2345 and the 7-cage could be 1+6 so the 1 isn't placed after all :(

@chrisphillips2467 3 года назад

That was fantastic. The amazing symmetry makes it a proper classic I think. Simon was suitably dopey a few times, and all the better for it!

@insectbah 2 года назад

Thanks for persevering through the beginning so we could see this great puzzle!

@beatlesunderwoood 3 года назад

The reasoning that led to concluding you had to put three ones and three nines on the redban squares, also applies to every other digit. So there has to be a minimum of three fives on the redban squares, as well. Once the ones and nines were placed, there were only three remaining redbans on which to place the fives. On the squares at the intersections of rows 3, 6, and 9 with columns 3, 6, and 9, you cannot have a 1, 5, or 9 or you would have to place them on a fourth redban square, which is not possible. These two principles would have faciltated the solve immensely.

@jsharvey1961 3 года назад

Indeed, impressive. :-)

@PathOfShrines 3 года назад

Marvelous puzzle. I also had basically nothing until I finally figured out the right way to approach the break-in. Unfortunately, I fouled it up somewhere near the hour mark (I kept mentally slipping up and trying to put consecutive digits in the cage in box 5) and had to restart. Fortunately, restarting is actually quite fast once you've figured out the break-in! I knocked out the puzzle on the second attempt in 19:20, for about 82 minutes total.

@glennmelven3414 3 года назад

Nobody's getting cross with you Simon for missing something simple in a puzzle most people can't place a digit in. Probably a few people laughing though when you couldn't figure out why the box 7 Renban had to have 3456 in it, especially when you had just said this 34 pair in box 8 pushes 34 into that square.

@ragnkja 3 года назад

I was definitely giggling at that point.

@ralph17p 3 года назад

I like how there are so many different ways of getting to the answer. You went with the 47 pair breaking the Renband at 31:45. I had paused the video a bit earlier to try and work my way ahead, and the logic I had use to place it was the "secret" you mentioned earlier, that the two cage digits in row 8 would sum to the digits in the gaps. There was an 8 in box 9, which was 1 more than the 7 which was the maximum in the 18-cage, so 9 in C1R9 would have forced at least 10 into C3R8. But, as always, I would have gotten precisely nowhere without the head start you gave at the beginning. I'm not yet at the stage where I can figure out how to get started on these puzzles on my own steam. Still - the fact I finished the rest after pausing around 27:00 I'm counting as massive progress

@bossiebos881 3 года назад

Hi Simon, let me start of with saying I have the utmost respect for your ability to persevere in finding solutions to sudokus which are way too hard for me to solve. Having said that, I love watching you struggle and eventually find a solution. It’s just juicy entertainment for me. :) Now, and I don’t mean any disrespect whatsoever, I am only pointing this out to make you an even better/faster/whathaveyou sudoku solver and famous YT personality. ;p I have noticed the following before in other videos and I think this might help you out a bit: When finding a placable digit and figuring out it’s effect on the rest of the grid, you regularly do scan horizontally, but forget to scan vertically (and vice versa) and run of on some other sudokusolving tangent. Consider the following timestamps: 28:16 and 31:44 In both these instances of placing the 9s you would have been able to place the 9 on the renban in box 8, which might have helped placing other 9s. :)

@abhijittapadar1813 3 года назад

How clever setting this is!!!!!

@unbekannter_Nutzer 3 года назад

I watched for a box, containing a complete cage, and found box 9 with the 18-cage and figured out, that 5-6-7 would be a solution, leaving room for a 4 digit ranban-line, i.e. 1-2-3-4, and that dealing the 5-6-7 to a higher digit by buying a lower one, like 3-6-9 doesn't work. No other combination gives enough room for 4 consecutive digits. But then I got stuck and watch the master solution to the point, when he showed, that you can't put 2 equal quadrupels into a box row or box column and mentioned, that we have to place 3 high and 3 low quadrupels into the boxes. From there, it was only a matter of very few hours, to solve it.

@fyshfysh Год назад

this one was yet another time I'm glad i didn't bother attempting it. just unbelievable setting and solving

@MyriamTT 3 года назад

A-ma-zing puzzle. Great fun !!

@markp7262 3 года назад

38:08 finish. Once I broke in with the 1 and 9 renbans, I realized that due to the placement of 1s and 9s, the renbans in boxes 3 and 7 had to include 4 and 6 (and therefore 5), because using either 2-4 or 6-8 would force three digits into a space that only could accept two of them. Very tricky!

@DukeBG 3 года назад

What a beautiful break-in

@DarkChasm 3 года назад

😱 that was absolutely amazing I loved every second of it.

@williambarnes3868 3 года назад

Box 9 has 7 &9 which sorts box 7 & 8 for starters. Simon seems to forget the game is called SUdoku, but seems reluctant to follow through on things.

@mahmoudabdelghany7112 3 года назад

Very nice and fun.. brilliant setting!

@samus88 3 года назад

This is the Renban masterpiece. No doubt.

@tehjoch 3 года назад

I probably never would have been able to even see the logic that simon used to get those digits in, but that 9 at 28:33 could have been removed earlier by the fact that it's on a crossing of the "purple" area

@Mark199201 3 года назад

From somewhere around 17:00 it appears to be meta-suduko... This is frying my brain. I chose a good puzzle to not try...

@maelwys5 3 года назад

looks like a spiderweb in inviting you into the renban rooms...

@Magicsquarepuzzles 3 года назад

What an ingenious puzzle solved by an ingenious person.You are making solving Sudoku appear to be a child's play.

@andrewgrant6516 3 года назад

I took one look at this puzzle and stuck a 5 in the middle. Hurrah!

@strangelyjamesly4078 3 года назад

Very approachable. But so is China. And there is more chance of me walking to China...

@yumivt 3 года назад

the 9 at 28:17 resolves the position of the renban 9 in the 8 square as a hidden single

@LorisLaboratory 3 года назад

ermahgerd Im in a CTC video! (My SudokuPad review! XD) I did have trouble finding it, btw, since "sudoku pad" didn't bring it up (at least not anywhere near the top), something to fix if possible so no one misses it? :) Happy to support all of your work, I just love every video, I watch them when I can pay attention and I also play them when I need help falling asleep (with volume just low enough that I can't hear to follow along in my head LOL). You've mentioned others saying it has helped with their anxiety, and you can count me among those folks too. Thank you!! :)

@malvoliosf 3 года назад

I was indeed very cross with Simon about 36:20. When he put the 3 and 4 in the 7-cage (33:11), that forced the Renban line in box 7 to be 3456: where else could the 3 and the 4 go?

@yellowtrumpetfish Год назад

Beautiful break in, beyond me.

@peterbriggs3408 3 года назад

What have you got against box 8? I'm near running out of oxygen here! :-)

@chriscartwright6292 3 года назад

I just said the same thing out loud to myself 😂

@alpha1481 3 года назад

The 3 in box 7 and the 5 in box 8. Come on Simon!!! Im holding my breath!!!

@JMPDev 3 года назад

Right?! The 9 in box 8 that could have been placed right after 28:15 but it would take another 15 minutes. I felt so bad XD

@TomHickey 3 года назад

I think a piece of Simon's sudoku soul broke when he found he got tripped up on the 3 needing to be on the renban line in box 7. Great solve, and kudos on the break in!

@davemedvitz7240 3 года назад

Read the description and had to give it a try. Assumed I'd fail, but a full day later, I've managed to do it. Now to watch the video and see how to do it right....

@davemedvitz7240 3 года назад

My break in was similar. Used set to remove rows 3,6,9 from cols 1,2,4,5,7,8. This left me with the 8 renban lines + the 18 cage equaling 3 full sets of 1-9 + the bottom right cell in each box. The got me to 3 renban lines being 1-4, 3 being 6-9, and the other two needing a 5. This also left me a 5 for the 18 box, and told me that the bottom right cells could not be 1,5,9.

@toddbiesel4288 3 года назад

I was just thinking, "Cleanup on Row 8, cleanup on Row 8" for the longest time.

@matthewender3473 3 года назад

My first digit in 6:43! Actual solving it... more like 78 minutes, and that including some bifurcation. Still, I'll take it.

@kimberlypreston6204 3 года назад

I would never be cross at you for not seeing that 3456 Simon. WE love you and you are amazing. No one is perfect so don't be so hard on yourself. If anyone is upset with you they are jerks.

@acejohnson81 3 года назад

Thing I noticed right away at start is you couldn't put 216 on the bottom of box 8 because then what 4 consecutive digits could go on the line.

@ianagol 3 года назад

At minute 27 or so, it might be worth keeping the highlighting a bit more to consider 5s. The same argument as with 1s and 9s places 5s in the renbans in boxes 3 and 7 and the 18 cage in box 5, since there are no 5s in the other renbans, as well as keeping 5 from the intersection points of the purple lattice (as with the 1s and 9s). But this is just a minor help. Nice solve and kudos to udukos!

@AllenBaranov 3 года назад

Typical Simon is finding the most elaborate way to populate the grid seemingly from nowhere but not noticing that a 3/4 pair in row 9 forces a 3 onto the renban in box 7. And then crafting the most elaborate way to prove it anyway.

@emphyriohazzl1510 3 года назад

[spoiler ahead] a 3x3 Sudoku/latin square, place the 2 quadruplets once on each renban row, once on each renban column (no way to have 3 quadruplets placed once in each box at same relative positions with square shape though, as it would always break)[/spoiler] Very funny idea!! Oh and 34:30 Simon just cracked me up so much :P. "Is that really as simple as that" :). But brilliant solve overall as usual! :)

@boingboingbaggies 3 года назад

Surprised Simon didn't use the centre square more. The 9 forced the 1234 and 5678 into boxes 2 and 8 resolved by the 7-cage in box 8 give 1234 in box 2. Similarly the 1 combined with the 7 cage in box 6 forces 1234 into box 4 and 6789 into box 6. This then forces position of remaining 1234 and 6789 squares. Also the 18-cage along with the given 1,9 meant that the other 3 cells must add to 17 and must be either 467 or 458. Since Box 6 and 9 both contain 6789 squares and 7-cages (and once the 25 pairs eliminated) the 4 is forced into R6C6 and the 34 7-cages in boxes 6 and 8 are resolved.

@LeakyGuy 4 месяца назад

Polarity was a good approach at the start. You could have gotten the fact that you need exactly 2 odd and 2 even digits in the 18-cage inside the center box.

@JohnSmith-il3iv 3 года назад

Can't wait for another excellent video.

@chrisphillips2467 3 года назад

Mark will be along in an hour or so.

@shardj5151 Год назад

Once I wrote out the possible combinations of three series 2x2 renbans, and noticed that 1,2,8,9 can't ever appear twice in each series, that gave me the giant x wings on 1 and 9 thanks to the starting digits. Which got me that initial 1 Took me nearly an hour to do that though, I spent way too long trying to start with the cages

@Kev1305 3 года назад

Does anyone else only watch Simon and not Mark? For absolutely no reason other than the first puzzle I watched was from Simon and I fell in love with his love for the solve and that's it. Won't even TRY Mark. Am I an idiot?

@d4r4butler74 3 года назад

The solves are very different. But not more or less brilliant.

@KalOrtPor 3 года назад

Love watching both, Simon for his creative and zen-like approach with an almost artistic appreciation, and Mark for his methodical and intricate insights and things like spotting naked singles practically instantly.

@ragnkja 3 года назад

I rarely watch Mark’s videos immediately when they come out, since I’m unlikely to be awake enough for complex sudoku at midnight.

@margaretmcnarry4298 3 года назад

Yes! They have very different approaches but each is equally valid and equally exciting, It’s amazing to watch Mark scan a grid and immediately see what numbers are missing as he says them backwards and enters them in the correct order as annotations! And his ability to spot naked singles is beyond astonishing! Do give Mark’s vids a go again - with a very open mind, please!