The Thermometer Sudoku Quest

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[Quick update: Simon's solve of TotallyNormalCat's Broken Secrets was released on the main channel this morning!]
** TODAY'S PUZZLE **
A Chaos Construction is a sudoku in which the 3x3 areas are replaced by 9-cell regions which the solver must determine the shape of. This example from Scojo is fabulous with a variety of different logic needed to tease out the geometry. We've had over a dozen recommendations to try this one so do give a go!
Play the puzzle at the following link:
sudokupad.app/f2ajiy0h66
Rules:
Place the digits 1-9 once each in every row, column, and 9 cell orthogonally connected region. The location of each region must be determined. Along a thermometer, digits must increase from bulb to tip. The digit in the bulb of a thermometer indicates how many thermometer bulbs contain that digit. Additionally, the digit in the bulb of a thermometer indicates how many times that thermometer crosses a border between regions. A digit in a square indicates how many cells in its region are on a thermometer. A V shape between two digits points to the lower digit.
You can watch us in the latest @numberphile video here:
• A Sudoku Secret to Blo...
** ROLLER COASTER NURIKABE by the_cogito **
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logic-masters.de/Raetselporta...
Also there's our January Patreon competition: All The Fun Of The Fair featuring sudokus themed around fairground rides!
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▶ Contents Of This Video ◀
0:00 Theme music & Puzzle intro
1:14 Broken Secrets by TotallyNormalCat
1:55 Patreon competition deadline
2:36 Happy Birthdays
4:39 Rules
9:33 Start of Solve: Let's Get Cracking
▶ Contact Us ◀
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Опубликовано:

26 июн 2024

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Комментарии : 134

@Ciiran 5 месяцев назад

One thick line was missing. This bothered me immensely. But Simon found it. Now I will be able to sleep tonight.

@Da6moose6 5 месяцев назад

I was SO angry until I saw your comment while waiting for the video to finish because I was convinced he wasn’t going to add it.

@Ciiran 5 месяцев назад

@@Da6moose6 My brother from another mother.

@leeuwevdh 5 месяцев назад

I hope one day we’ll get to see a chaos sudoku in which all regions turn out to be the normal 3x3 boxes

@Anne_Mahoney 5 месяцев назад

I wonder how many of the regions you'd have to find before you knew for sure that that was the configuration? I expect you'd *suspect* after about two of them, but what kind of solve path would tell you for sure, and how early could it do so?

@afrayedknot81 5 месяцев назад

I believe jovi_al has done this. Or maybe it was a troll where the last two regions were actually not square.

@leeuwevdh 5 месяцев назад

@@afrayedknot81 is there a video on the channel about this puzzle?

@smileyface2411 5 месяцев назад

that would be evil

@ProfMonkeys 5 месяцев назад

The moment about 27 minutes in where Simon says "2 is not the same digit as 3" and shifts his eyes is one of the most wonderful and spectacular moments I have seen on this channel.

@longwaytotipperary 5 месяцев назад

The sun is out but it’s still cold. So watching Simon with my blanket and hot chocolate is my afternoon entertainment! Thank you Simon (and Mark) for years worth of AT LEAST 2 puzzles a day!!

@stevesebzda570 5 месяцев назад

I shoveled twice yesterday. It's freezing here. I had bean soup ealier. 😂

@longwaytotipperary 5 месяцев назад

@@stevesebzda570 oh my!

@Scojo486 5 месяцев назад

Thanks for another wonderful feature! As a few other people have pointed out, the easy way to resolve yellow would have been to ask where yellow gets it's 4, but I thoroughly enjoyed watching you realize you could use the sum of the squares. Editing to shout out a couple other setters who also made great puzzles based on the same prompt. Check out "Chaotic counting" by palpot and "Thermos Construction" by Prof.Dori on Logic Masters Germany!

@longwaytotipperary 5 месяцев назад

Very much enjoyed watching Simon solve your puzzle! The intermingling of the rules was satisfying for just the right amount of difficulty and signaling the next moves!

@QuarkTwain 5 месяцев назад

This was a fantastic puzzle. So clever how these rules work together. Bravo, Scojo!

@joelstevens5670 5 месяцев назад

This was an absolute cracker of a sudoku variant puzzle. A decent challenge but also highly entertaining to solve. Great job setting it.

@littyfam5136 5 месяцев назад

This would have gone a lot faster if you just asked at around 43:15 "Where does the yellow region get a 4?"

@Djaian2 5 месяцев назад

Exactly what I was thinking. And also at 1:02:48, that 4 cannot be in orange or grey, so it's a new region. Where is the square for this region? The key to this puzzle were the 4s

@ingiford175 5 месяцев назад

Yep, when he got all 4's I saw that yellow needed its four from c8, and the unmarked box needs the 4 on the bottom row....

@dno 5 месяцев назад

Haha, same, one of the few occasions where i was actually shouting at my phone.. "look at the fours, Simon!" 😂

@derekjc777 5 месяцев назад

Adding up the squares when all along the 4 in row 1 determined the shape of the yellow region! Simon will always find a complicated solution when a simple one is readily available.

@Censeo 5 месяцев назад

4 in row 9 couldn't be grey or orange, yet it needs to reach a square. Only one available far far away

@jonathanhood5514 5 месяцев назад

Yelling “Where’s the 4 in the yellow region” for ages and of course Simon takes the most complicated route to complete the region. 😂

@SpyrosSolda 5 месяцев назад

I was expecting the V to contain a 2/3 pair. That would be funny

@iambicpentakill 5 месяцев назад

Hah! Insert Simon's disclaimer about parties

@MissKapanadze 5 месяцев назад

I was really hoping for it 😭😭😭

@MissKapanadze 5 месяцев назад

I was really hoping for it 😭😭😭

@tonymanngreenwich 5 месяцев назад

Even though i had read this comment I pencil-marked a 23 pair and used it to make some progress. (It eventually broke.)

@frankthompson9630 5 месяцев назад

@@tonymanngreenwichI did exactly the same thing. Unfortunately, I filled out nearly the entire grid before I noticed a contradiction...

@markwright6685 5 месяцев назад

1:48:16 The bulbs having two restrictions/rules was a great idea, with the addition of the squares made for a tough, but beautiful puzzle. Thank you Scojo.

@SupremeOverlord24 5 месяцев назад

I enjoyed the fact that you could normally use a 2-cell thermometer to give the same information as the V in this puzzle ... but of course the thermometers were doing a bunch of *other* things, so that wasn't an option this time around.

@PhonkPuzzles 5 месяцев назад

This puzzle was an absolute masterpiece. I can't believe someone was genius enough to set something with a ruleset like this!

@martinyyt 5 месяцев назад

I wasn't going to watch all of this because of the late hour (midnight). But my, how the past hour has just flown by! Brilliant solve, very enjoyable to watch.

@57thorns 5 месяцев назад

1:07:36 Don't fret, looking for the 4 in yellow is another way to solve it. 4 are overall pretty good towards the end.

@ingiford175 5 месяцев назад

Yep, it did the yellow 4, and the unmarked square needs a 4. And since we only have 2 uncolored fours we know fairly quickly which goes to which

@SomeRandomGuyOnYouTube 5 месяцев назад

@ 1:02:47 the 4 in the bottom row must connect to the 1 square in column 8, and gives you a pretty good idea of the shape of that region, bearing in mind that it's quite difficult to account for all the cells in the SE corner

@Mephistahpheles 5 месяцев назад

Simon gets ultra focused on one logic-set. Very helpful for finding difficult stuff within that set, but resists "switching gears". Serves him very well in extremely difficult puzzles that have a linear solution, but not so much in puzzles that require a lot of back and forth between rules. I'm not really a particularly good solver, but nothing in this puzzle was particularly difficult, just needed a lot of that back & forth.

@smartsport 5 месяцев назад

That's how I did it too!

@aaronsebastian5156 2 месяца назад

1:02:51 "That 4 doesn't tell us anything." Me shouting at my screen: "Look at the 4's! You have all of them! Delineate! Where does yellow get a 4?!" It's rare I see something before Simon does in these puzzles. Love the content, though.

@HunterJE 5 месяцев назад

56:32 The one square is in fact fully walled and cannot take any cell of the thermo above it - it will never have room to grow to 9 cells unless it uses its sole allotted thermo cell to cross the thermo south of it…

@der_koleriker1799 5 месяцев назад

thats what i was thinking the entire time and i bothered me so much that he didn't realise it

@ethanchoo 5 месяцев назад

Thank god you delineated that last segment. ❤

@jojoj81Gaming 5 месяцев назад

Fabulous puzzle by Scojo. I really enjoyed solving this

@nathanmenezes7914 Месяц назад

A cool thing you'd notice from looking at the missing 4 in yellow is all the cells that appear in yellow's vertical region are the remaining in r1 [5,7,4]. You get the same effect where [8, 5, 7, 4] are in vertical yellow and horizontal pink. Same effects with red [3,8] and blue [2,3,7].

@benketteridge9150 5 месяцев назад

Hissing Sid is Innoccent!

@anaayoung9142 5 месяцев назад

It is always nice to watch a great solve to a construction sudoku! 😆

@craigthorsen 5 месяцев назад

Great Solve! (And thanks for filling in that last border.)

@JoostMehrtens 5 месяцев назад

@46:10 you have 7 4’s. That means there are only 4 possible locations left. 2 on row 9, one in blue and one in a square. Yellow needs a 4 and the only possible 4 is straight down from column 8.

@LavenderGooms 5 месяцев назад

Awesome that you're doing this one. I loved it when it came out, the bulb constraint was a really cool choice for it.

@eclectichoosier5474 5 месяцев назад

Simon, you always take the PERFECT amount of time to solve.

@jonkess2768 5 месяцев назад

1:11:30 Some day there is going to be a troll puzzle with 9 full vertical sodoku regions lol :D

@everorizon 5 месяцев назад

How about a chaos construction puzzle where the regions are all 3×3 boxes?

@jonkess2768 5 месяцев назад

@@everorizon Or this yes maybe more realistic because those are actual restrictions whereas columns are not.

@lasagna312 5 месяцев назад

I'm so glad Simon finally fully boxed in the red region at the very last second.

@ProfMonkeys 5 месяцев назад

At ~45 minutes in, there was another way Simon could have found the 6 in the green square. He noticed that the green region had to grow into at least one more thermo cell earlier, but he didn't ask the reciprocal question of what is the maximum number of thermo cells it could grow into. The region had to grow by 2 more cells, one of those two cells must be a thermo cell, but it is not possible for both to be because of the region boundary crossing rule, which forces the 6.

@johnnyw4life 5 месяцев назад

30 seconds left of the video ( 1:16:13 ) and he finally sees it! My OCD is saved, thank you!

@kenhaley4 5 месяцев назад

Once again a brilliant solution! I can't believe how you find the next thing to consider while I'm totally at a loss. It's so fun watching you solve these..

@ImNoah2212 5 месяцев назад

I’m finally getting to where I’m able to finish some of these puzzles you guys feature. Was happy to be able to get through this one after 2 hours. Amazing puzzle Scojo was a treat to figure out

@piarittersporn 5 месяцев назад

What a fantastic puzzle. Yesterday I gave up .... but today I could solve it .... after ages. Great challenge.

@emilywilliams3237 5 месяцев назад

Beautiful solve, Simon, and very interesting. You are a genius at these region-defining sorts of sudoku puzzles. Thank you!!

@johnbell9074 5 месяцев назад

Got stuck on and off but after the 33 min mark managed to complete by myself in under an hour. Thanks for the help, and amazed how the logic ran.

@windybeach2184 5 месяцев назад

This puzzle is right up my alley! Lots of colouring and not too much arithmetic. Just nicely flowing logic pathways. I’m pleased to have finished it much faster than Simon, but I must credit him for all the sudoku knowledge I’ve picked up from his previous videos.

@LiquorStoreJon 5 месяцев назад

What a Saturday! Over 2 and a half hours of watching Simon do battle!

@kivonni 5 месяцев назад

Thank you for the birthday message, it is so kind 😊 I had a Chocolate cake with the correct icing ratio, in case you were wondering.

@Mn0ty 5 месяцев назад

3 4 can be discarded immediately by noticing the 3-4 pair in bulbs in column 9, making r4c9 at least a 5, putting six digits equal or bigger than 5 on row 4.

@Cid0484 5 месяцев назад

This must be the first time I see that Simon uses the pen tool to mark the complete outer border of the grid at one point rather than every time he completes a region. Very proud of him for finally making his life a little easier 😂

@vedrankordic9161 5 месяцев назад

You mean like this? ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-QSIZ_rM3G7M.htmlsi=KOrcPM4R-Pax2uuq&t=1742 Maybe he only does it when there would otherwise be no progress made :)

@johnnyw4life 5 месяцев назад

Was thinking the same. Now he needs to teach Mark 😂

@HunterJE 5 месяцев назад

43:54 Alternate route here, green can’t go down through the gap in column 2 because a 67 pair in green would put three 89s in row 4.

@BozoTheBear 5 месяцев назад

Beautiful puzzle, thanks!

@ChaosKnight7000 5 месяцев назад

It's a beautiful puzzle with just the right amount of difficulty. Eighty minutes to solve for me. I'm just happy to not be too much slower than Simon. 🙂

@Samoth1995 5 месяцев назад

16:13 Amusingly, you actually ALSO can prove it can't be a combination of 2s and 5s on thermos by showing the 5's don't work. If you play out the idea of putting 5 5's on the bulbs, you're forced to align them in a fairly precise way - r1c1, r3c5, r5c9, r6c3, and r7c4. If you play out the 5-cell thermos of these (all except r7c4), they would all have 6789 along the length of the thermo. This then breaks the r7c4 thermo, as its tip has no feasible digit - it sees all digits greater than 5.

@CorrectHorseBatteryStaple472 5 месяцев назад

Great solve! Lots of region deductions were only caught late, and those felt easier to grasp than the rest, at least for myself. It's interesting to watch Simon miss certain types of clues that are plain as day to me, even though 95% of the time it's Simon pulling out stuff I'd never have noticed. The shapes of red, yellow and the second pink were available for quite a while.

@ericpraline1302 5 месяцев назад

Cracking puzzle, thanks, I enjoyed every minute of this. The solve was pretty smooth for me so limited opportunities for staring blankly at the screen.

@markbooth6706 5 месяцев назад

Awesome puzzle. Surely you’re aware of the rule that you only need four unique colours to colour any map.

@windybeach2184 5 месяцев назад

If you ever need a little reassurance from Simon 50:10

@fredgoodyer4907 5 месяцев назад

A couple of fun points (to me 😅): 41:41 The square in question is a 6 straight away, as there is simply no possible region green can be that contains any other number of thermo cells! 46:15 The 13 pair is immediately resolved since the bottom one sees the two remaining thermo bulbs, which are a 12 pair 😊

@nicka3697 5 месяцев назад

I did all the colouring. Except the last 5 boxes in the bottom left before I did any suduko. The need to cut the thermometers and the restriction on the lower right thermo to not only be cut 4 times but for the bulb to be in a four thermo cell region is enough to disambiguate all the options. But then Simon was as always faster than me so maybe his way was better!

@AndyGill78 5 месяцев назад

I wonder how many constructors deliberately try to put a 3 in the corner, just for Simon.

@bobbie0976 5 месяцев назад

Awesome puzzle, started over once I made an error somewhere. Once I started over, knowing everything I figured out, it was an ultra quick solve lol. Also loved this didn’t take too much sudoku to complete. And of course: after all the brain work, we always love a 3 in the corner!! (Prefer this fireworks over the doo dee thing also!!)

@aWildKITsune Месяц назад

I think this is the first sudoku on this channel I solved faster than simon 😆 😆 😆 it was so simple simon was thinking too big brain to see the little things

@titusadduxas 5 месяцев назад

2:02:40 - I know it took me over 2 hours but I LOVED IT!!!

@PathOfShrines 5 месяцев назад

Fun puzzle! I really could not stop screwing up solving this; IIRC it took two full resets. 115:48 after everything. Think I was just crossing out the wrong digits within regions in the endgame.

@Mephistahpheles 5 месяцев назад

lol @ 1:02:00 "That's [4] not gonna do anything." Omg...it's huge!

@Gonzalo_Garcia_ 5 месяцев назад

34:54 for me. Incredible puzzle, super fun to solve!!

@AnnaNicole. 5 месяцев назад

I was worried a moment until the final seconds of the video.

@frankjiang1857 5 месяцев назад

Finished in 72:07. Very fun puzzle!

@dvorsky78 5 месяцев назад

The 3 at the top square could have been deduced by the 1 in the box below it. The 1 could go through only 1 thermo and it had to escape, allowing it to only go down. That would leave the thermos above the 1 square unable to escape if they belonged to a different region than yellow meaning the only possibility was for them to be a part of the yellow region.

@Kinada 5 месяцев назад

97 min, I expected longer since I'm bad at making my own regions but near the end it seemed there was only one way it could possible work so I went with it.

@rutterbrian 5 месяцев назад

tfw you click unpause and hes not talking and you think wait did i unpause it or

@Soulavenger69 5 месяцев назад

I had a much easier time filling out the yellow region than the way Simon did it, you just had to think where it was getting a 4 from and realizing there was only one spot it could get one 😄 But I liked his logic too

@agoristtaxadvice 5 месяцев назад

ARGH- I forgot the V was a greater than sign, and treated a "5" V and drove myself crazy!

@MrCoxmic 5 месяцев назад

Every time you comment about your brain I think about the worst Star Trek (original series) episode, "Spock's Brain" with the line, "Brain and brain, what is brain?"

@coconuts2513 5 месяцев назад

Great puzzle, loved it. Funny idea for constructors who are way smarter than me: Chaos Construction Sudoku, with random regions, but the end solution has the digits 1-9 where the original boxes would be. Is there somerhing there?

@Rach881101 5 месяцев назад

63:29 for me. Brilliant puzzle!

@evanvandeneinde7095 4 месяца назад

Couldn't the yellow box moving down column 8 deduction have been made sooner? I understand the box containing a 3 was a constraint on the amount of thermo lines, but yellow has to take at least one of the remaining cells in row 2, and it can't take the 9 in row 3. Thus yellow has to take R2C8.

@Sternentier 5 месяцев назад

I was extremely annoyed until the very end when Simon finally finished the region boundaries.

@srwapo 5 месяцев назад

58:23, fun solve, but I had to look at the video around @35:41 to see that I had to just try some numbers on a thermo to rule out being one the 4 ones. Spun my wheels for like 20 minutes before I did that.

@57thorns 5 месяцев назад

1:04:29 r2c8 has to be yellow regardless if yellow square is 1, 2 or 3.

@sheazellweger5450 5 месяцев назад

I played this one in the app and got the same solution but it’s being marked wrong. Not sure if Sven can check that out.

@RoderickEtheria 5 месяцев назад

Gray and orange were my entirely last regions to touch at all.

@KyleBaran90 5 месяцев назад

Hey Simon, I'm curious; I also started watching because YT recommended the Miracle Sudoku that so many people had seen during covid. What is the average length of time your subscribers have been following CTC on YT? Just curious because one of the collectible channels I watch said their average viewership is about 4-6 months before people drop out of the hobby.

@MissKapanadze 5 месяцев назад

That might be a difficult metric to measure. I personally started watching CTC in 2020 when looking for classic sudoku technique tutorials. Since then I’ve had months when I was watching daily and other months when I wouldn’t watch any videos just depending on my own life. I’ve stayed subscribed to the channel though.

@AhsimNreiziev 5 месяцев назад

In case anyone reads this, and anyone knows: is anyone aware of whether the "honour roll" for the December Patreon Reward (the "Snackdoku Pack") has been, well....... rolled yet? And if so, in which video I might be able to find it?

@ramprakashkrishnan6651 2 месяца назад

Is there a rule that says each region has exactly one square?

@asktheraccoon 5 месяцев назад

*gets 5 digits* "wow this has done very little to help our cause"

@joelstevens5670 5 месяцев назад

I suppose in this video, you could say Simon failed to use the fours. I’ll show myself out. 😅

@Ardalambdion 5 месяцев назад

If I had solved, or more likely failed, the puzzle, I would have counted the number of thermo squares too, being 33. Wonder if that is useful info.

@simonmoore8776 5 месяцев назад

It is,that's how i got the yellow region square had to be three, after that the regions only had one possible solution.

@_-_-Sipita-_-_ 5 месяцев назад

44:03 for me. took very long on the break in because i forgot the circle rule.

@didntwantthisaccount 5 месяцев назад

Simon, I do hope you stop saying "no jokes about me at parties". It makes me sad that you are worried about whether or not the audience might be percieving you negatively. I promise you, you are delightful at parties, and I'm sure that anyone watching your videos is doing so because they find your personality pleasant and endearing. (And thank you for all the great videos!)

@netproteus1 5 месяцев назад

Shouting for about 25 minutes where the light green 4 got its thermo cells from

@ABodyInProgress 5 месяцев назад

Can we please go back to referring to the "V-shape" as the "Greater-Than" symbol, which is what it is?

@RichSmith77 5 месяцев назад

To be fair, when it's been rotated 90⁰, it is pretty much a V-shape too.

@ABodyInProgress 5 месяцев назад

@@RichSmith77 I'm not saying it doesn't HAVE a V-shape, but it's a simple mathematical symbol in which the open end is toward the greater digit. We were all taught that in school.

@dylanlenn7836 5 месяцев назад

hey, a quick one

@iambicpentakill 5 месяцев назад

@ 53:00 I'm pretty sure that Simon has gone quite mad

@troy.s 5 месяцев назад

Anyone else spend half the video wondering where R7C9 was going to get it's thermo cells? Also where yellow gets it's 4?

@theredstoneengineer6934 3 месяца назад

109:21 for me

@eckberthighwater2555 4 месяца назад

at 1:10:00 where is the 4 in yellow is easier

@ankitsonias201 5 месяцев назад

18:34 why can't the right most 2 bulb be 4? anyone could help?

@fredgoodyer4907 5 месяцев назад

At this time stamp, he simply says that there must be four bulbs with 4s, which can’t be four-cell thermos (they can only cross three region borders). Of the five five-cell thermos, four of them are 4s, at most one of which is in column 9, so the other three must all be 4. Only at 26:03 does he deduce that the rightmost 2-bulb cannot be a 4, due to the inability to place all of the low digits in row 4 😊 hope that helps!

@ankitsonias201 5 месяцев назад

@@fredgoodyer4907 thanks for helping.. but still it's not clear. As you mentioned that out of 5-cell thermos, 4 need to be 4s. so at this time stamp, how it was sure that out of these 2 right most only one will be of 4s and why these 2 right most + any 2 of other 5-cell thermos can't be a possible solution. Later it got clear but how at this time stamp it was concluded? in other word, how he was sure that at most one of which is in column 9, why it can't be both of them and other 2 from remaining 3 5-cells thermos?

@fredgoodyer4907 5 месяцев назад

@@ankitsonias201 I think it’s just that you can’t have two of any number in the same row column or box anywhere in the puzzle 😅

@LednacekZ 5 месяцев назад

i gave up. after an hour of solving i got the areas right and then i completely messed up the irregular sudoku. i am so pissed off.

@David_K_Booth 5 месяцев назад

After a few years of watching the channel, I've become more inclined to backtrack, and try to find the problem. But there are still some puzzles where I slip up and just can't figure out how, so I do sympathise. Better luck with the next one.

@LednacekZ 5 месяцев назад

@@David_K_Booth i also rather backtrack than restart or give up, but this time i made mistakes and backtracking only made it worse.