The Sudoku With No Digits. At All.

▶ KICKSTARTER LINK◀
www.kickstarter.com/projects/...
After an amazing first couple of days, we have hit the target to make the book! Now we just hope we can reach the stretch goals to include the new puzzles!! Please help us get there if you can!
**********************************************************************
▶Today's Puzzle◀
Today's puzzle looks incredibly daunting - no digits anywhere - but the author, udukos, was worried we'll find it too easy!! You can play it here:
app.crackingthecryptic.com/we...
Rules: Normal sudoku rules apply. Digits may not repeat within a cage. Within every 3*3 box (marked by thick black lines), all the killer cages have the same sum. Also, killer cage sums are unique for every 3*3 box i.e if box 1 (top left box) had killer cages each of which sum up to 10, then none of the other boxes can have killer cages with a sum of 10. The killer cage sums are not given and have to be deduced.
**************************************************************
Our Patreon page has lots of extra content including Scott Strosahl's Puzzle Hunt and Phistomefel's latest sudoku! Watch out for our videos on how to solve Scott's hunt too - coming very soon!
/ crackingthecryptic
************************************************************************
Miracle Sudoku is OUT on Android, Steam and App Store.
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App Store: apps.apple.com/us/app/id15273...
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▶ OUR BACK CATALOGUE - ALL CATEGORISED WITH LINKS!◀
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▶ OUR NEW THERMO SUDOKU APP IS OUT!◀
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Steam: store.steampowered.com/app/13...
▶ NEW CRACKING THE CRYPTIC MERCHANDISE◀
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▶ OUR CHESS SUDOKU APP IS NOW OUT!◀
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▶TRY OUR CLASSIC SUDOKU APP◀
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▶TRY OUR SANDWICH SUDOKU APP◀
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▶SEND US PUZZLES TO SOLVE/CONTACT US◀
[e-mail]
▶FOLLOW US◀
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@crypticcracking
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▶SOFTWARE◀
Play the puzzle in the video by clicking the link under the video (above). We are building a website which will allow you to enter your own sudoku puzzles into the software and this is coming soon!
▶Logo Design◀
Melvyn Mainini
▶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. We're also "cryptic crossword" aficionados. Mark is the twelve-time winner of The Times championship and Simon is the former record holder for most consecutive correct solutions to The Listener crossword. We hope we can help your puzzle solving while also introducing you to some of the world's best puzzles.
Thank you for watching!
Simon and Mark

[@columbus8myhw]

Next week: "This sudoku doesn't even have a _grid"_

[@columbus8myhw]

To any puzzle creators reading this: yes that is a challenge

[@rajeshofficial1657]

after that: this sudoku DOESN'T EVEN EXIST!

[@baconscoobysnacks3135]

"This sudoku the lines are now numbers, the numbers are now lines, and my computer has a virus 😟"

[@gerarbendfeldt]

Actually, it would be interesting to see a video of this. Lol, I mean Simon designing a sudoku from scratch

[@DNHarris]

The following week, "This sudoku doesn't even have numbers."

[@jetzeschaafsma1211]

Simon should start a guitar channel where he solves a sudoku in the intro.

[@averagewatcher]

yes absoulutely for sure

[@crazybeam7813]

True

[@morgiewthelord8648]

@@averagewatcher why did u do this

[@anmellie8992]

Haha 12 minutes intro 😅😅

[@85TITZ]

it would be called cryptic the cracking

[@seguaye]

I feel like being this good at sudokus is one of those skills that impresses a very specific group of people, and I’m that people.

[@SilentHorusKnight]

Yup, me too.

[@itzsquishy3712]

I despise sudoku. I literally hate them so god damn much. But watching this man solve them from absolutely nothing is so satisfying

[@djtheboss_]

Agreed we are all cracked at life

[@m16fermy]

Literally because of this reason I decided to make a joke out of it with my friend would say something stupid I would tell him "bro I've gotten Good at Sudoku don't try me" and we both just start laughing extremely hard

[@AlphaFX-kv4ud]

Ah yes that people a perfect example of grammar

[@Anvekeen]

Him, not solving the puzzle for half a second : "It's one of those moments when I can feel you're all shouting at your screen" Me, completely mesmerized : 😶😶😶 Sure man, sure... I totally see the next move.... 😶😶😶

[@BullyMaguireTime]

When he said that i felt really smart because i saw the next move 😂.

[@XYZeNxghtmxre]

@@BullyMaguireTime I’ve only ever seen the next move once in all the vids they’ve made 😂

[@izjgxj4275]

He's usually a bit faster than I am but that's mainly cause my approach is a little different and he always starts watching out for stuff in a different square than I do

[@MercuryA2000]

I was sitting there like "I don't even know why your last 8 moves made sense dude..."

[@malevolentsponge]

hey man I can tell you for a fact that none of the boxes contain -7

[@NeoNeonGreen]

Can't wait for sudoku but there's no sudoku

[@derekfordyce9]

Sudoku, but no numbers or gridlines.

[@paulbelanger7383]

Blank piece of paper 🤣

[@NeoNeonGreen]

@@paulbelanger7383 there is no paper lol

[@Flowerxhorn]

There were "Sudoku does not apply" video though 😉

[@muhammadzikriramadhan7003]

Sudoku but there is no video

[@yelprahmine4176]

“This is one of those moments where you’re all yelling at your screen saying stop being an idiot” bro I don’t even know how you’ve gotten to where you are 😂

[@calibre97]

I only had one moment where I could see by knight's move in a 58 box that it had to be 5. That's it. That was my moment, after he was already just shy of half way there. But he was on solving the magic boxes rather than tidying. Man, this stuff is fun to watch!

[@FireGamer99]

3:55 I like that after years of doing sudoku variants on video, Simon always explains simple sudoku variant logic for any new watchers. Simon, if you read this, I thank you for slowing down for us sudoku noobs. I appreciate it.

[@commie281]

Seriously. He could've gone so much faster and impressed us more but he engaged with the audience and made us think with him. Amazing isn't it?

[@ZkullShot]

That is what makes him special, I am a total noob and to be able to see the magic slowly unfolds itself through Simon's words, I... It's magnificent, he slows down to create such a lovely journey for us to experience. We need to protect this man 😊

[@pianissimo7121]

He does sometimes gloss of complex stuff quickly because he is so excited. It's totally forgiven.

[@sprinklefruits]

I so desperately love how he so effectively explains his thinking throughout. The skill in this is just not quickly solving puzzles, but also TEACHING them too? A true artist

[@benismann]

Ye! I never in my life did sudoku but he explains everything so good that even i can have a grib on what's going on

[@BrodieEaton]

"Nothing easy about it. It took me nearly half an hour" *meanwhile my attempt took 4 hours*

[@pradanamardya1851]

Better than me bro, i even left it sleeing and continued it next morning

[@noname117spore]

I screwed up so badly and gave up after probably 5-6 hours. I still don't know how the bottom left square is 14 and the middle right square is 16. I still don't understand how I got that wrong.

[@BrodieEaton]

@@noname117spore It's just a whole lot of mental methematics. No that's not a typo.

[@kkTeaz]

*it's been a week and I still am confused*

[@orbitalteapot21]

Same, makes me appreciate how skilled you have to be to get this in 30 minutes. I had to write so many tables.

[@melg279]

“You must all be shouting at your screen saying I’m stupid”. I promise you. That did not even cross my mind

[@coraljones537]

Didn’t even have time for it to cross my mind and he was off again solving it

[@OldHunterTom]

Shout out KZbin for randomly recommending this channel the other day. I'm obsessed.

[@paulmdt1]

I don't think the KZbin algorithm does random. (Although I must admit it does seem to when selecting the ads I see).

[@Jablicek]

Welcome, friend. The tea's hot and the biscuits are perfect! :)

[@OldHunterTom]

@@paulmdt1 who knows. Most videos I watch are video game/fitness related. The universe works in mysterious ways.

[@babbel124]

@@OldHunterTom A big KZbin channel in the drawing section who often draw gaming stuff(drawfee) recently mentioned someone calmly solving Sudokus. I imagine him. Because of that there were many gaming people searching and watching him so that's why the algorithm suggested it to us

[@doistricking]

Lmao same

[@ardenr3533]

i LOVE how excited he gets when he sees a really satisfying move

[@nilon5327]

And because we know the 5 is there this can't be a 7, this fixes the 3, that gives us the 8 and because there's an 8 this must be a 4, this is then an 8, that's a 1, that's a 2, that's a 9, Sudoku tells us this is a 4 again, OH THIS IS JUST ABSOLUTELY BEAUTIFUL, WHAT A MARVELLOUS SUDOKU THIS IS 😀

[@Skycroft1000]

Man we used to joke about getting a Sudoku with no digits. What next? No boxes or lines? I liked this one. The logic was simple and clear (not _easy_ but I never had trouble following it), but still enormously engaging.

[@landonbrown5295]

Not the first one we've handle this. There was another killer grid with no numbers before. What we need next is a rule set that gives a unique solution from a blank grid.

[@OldHunterTom]

My only problem with these puzzles is it's hard for my eyes to see the cages. But I stay for the commentary.

[@masheroz]

Haven't we also had a killer sudoku where we had to construct an irregular grid?

[@AEPMUSlC]

@@OldHunterTom First thing I do with these puzzles are colour the cages and make the rest yellow.

[@AEPMUSlC]

@@masheroz There was a puzzle where the cages sum to a multiple of 13 but you didn't know which ones.

[@yishsaur7657]

Sudoku But The Top 9 Rows are Empty?!

[@Jablicek]

A "Choose your own adventure" puzzle!

[@lizzie1335]

Jablička with a unique solution!

[@moonglum101]

The bottom 9 rows are empty too! Not to mention the columns!

[@yishsaur7657]

And All 9 Boxes Are Empty Too!? HoW iS ThAt PoSsIbLe??2

[@plumber1337]

How about recreating this same puzzle, but with the 10-18 numbers, would the rules still work?

[@RasperHelpdesk]

Your mention of a box needing a negative number made me wonder, could a Killer Sudoku be set where all odd values are treated as negative? So a box with 6 7 8 would 'sum' to 7 (6+8 - 7). Could call it "Odd ones out" as you are subtracting the odd ones.

[@paulcook2961]

Good idea. Make one. I'll happily try to test-solve it.

[@RasperHelpdesk]

@@paulcook2961 Setting puzzles is well beyond my ability :)

[@Croccifixo]

Very interesting idea, it seems like it would be possible, and it would absolutely screw with Simons head, as most of the sums seem to be stuck in his head from memory solving loads of killer sudokus and kakuro. Unfortunately, I have no idea how to set a sudoku, but it could absolutely be an puzzle

[@RasperHelpdesk]

@@Croccifixo Could do things like an 8 cel cage with a sum of 0, and deduce it has no 5.

[@joaopedroholanda4167]

Suggest it on the discord server! Seems folks there work on ideas together quite frequently

[@stevieinselby]

27:15 That has to be the most contrived bit of logic to place a 9, when all you needed to do was look half an inch to the left of the 9 you had just written in 😎

[@Xeridanus]

He does that. It's part of the fun of the channel.

[@littleschnitzel8226]

There should be an ultimate Kickstarter goal to have Simon strumming his guitar in a "live" concert here on the channel.

[@woodchuk1]

I’d pay more to get that!

[@londov1]

maybe we can get some of that when and if they figure out how they can get twitch working

[@MichaelGreen831]

Could you imagine any of Simon’s viewers who are bathed in his positivity using the word “idiot” while watching?

[@theatog]

Gosh.... If only there weren't a "I scream at my screen" comment on every freaking video. Even at the highest difficulty, if Simon miss a scan by merely 10 seconds, some rando out there immediately allegedly scream for that long,then comment about it so they could maybe feel good about themselves? I plead that it should stop.

[@Jablicek]

Only when directed at themselves.

[@paulcook2961]

@@theatog I plead that it continues. It's part of the fun. How many people in the crowd at a football match scream "I wouldn't have missed that". They paid for their tickets didn't they?

[@mojoface]

@@paulcook2961 so because douchebags exist offline, we should tolerate them online? I don't get it.

[@bacicinvatteneaca]

@@theatog it's definitely not about feeling good about oneself, it's just a release of frustration

[@fynnsternis6432]

23:42 when I realized that sum must be fourteen because we already had an 11 sum in another square, I was so excited :D Simon said in the beginning of the video that he refuses to believe the square would be useful (for the start probably, but still), and now it actually did something, aw man, this puzzle is great. Edit: It was fascinating enough that I forgot my coffee, oops. Well, guess that's lukewarm coffee for me then. Worth it

[@Sam_on_YouTube]

Spent an hour. Didn't get a digit.

[@kentmartin9289]

I spent half an hour, got 2 digits, then completely stuck. Watched this to find out my 2 digits were wrong.

[@andreapatacchiola1184]

@@kentmartin9289 love it! Ahaha

[@Sam_on_YouTube]

I needed about 3 or 4 hints, but I followed mostly the same path he did, so I was able to watch when I got stuck. I needed a hint at the 11 minute mark of the video. 45 minutes later, I needed the hint at the 19 minute mark. So... he's a LOT faster than me.

[@Ben-vs6zr]

Never thought I'd be amazed by a sudoku puzzle, or watching someone solve it, but here we are.

[@stevenlomon]

Yeah, welcome dude! This channel is a GEM

[@ItlsWhatltls]

The only game where ‘tidying up’ means to add more numbers

[@heartlikeice]

I love it when Simon really gets going and starts praising the puzzle. It makes me feel smarter just watching him solve it.

[@MesaperProductions]

When I saw the total constraints, I knew that Simon would have it right off. His knowledge of digit combos is world class. And Simon, we NEVER think you're an idiot!

[@glum_hippo]

Don't worry, Simon! 'udukos' is actually a Hungarian word. The 'd' is silent, the 'u' and 'o' are mutated, and the 's' turns into sh, so you're already pronouncing it correctly by saying 'Akash'

[@jrvdl8]

What does it mean?

[@davidthendarionbertalan7854]

LOLOLOLOL

[@ounobaga1829]

@@nickelchlorine2753 wait what? so it means "anagram" while being an anagram itself for "sudoku"? that's gotta be the smartest puzzle name indeed!

[@norabarlai6288]

What? I'm Hungarian and i don't get it, could you please...?

[@li_ka2]

@@norabarlai6288 It was a joke

[@sarahsomething5682]

Somehow I can tell that you’re a really beautiful person, you have so much excitement and awe and humility combined with your respectful and uplifting encouragement for the creator of this puzzle. You’re intelligent but not arrogant. You really made this video so much more enjoyable than it would have been if an abrasive or unimpressed person had done it. This is my first time watching a video of yours and I’m really glad I came across it even though I am not good at puzzles myself most of the time. I just enjoy watching people who are passionate and proficient at whatever they’re doing.

[@corbandotson4295]

Really well said.

[@djkrossmf2798]

It is really soothing to listen to his voice, talking about numbers and puzzles.

[@loginwithlogan3183]

Um....I don’t play sudoku....at all. I’ve never played a single game ever....yet this is great to watch

[@jrvdl8]

I'd say the best way to remember 'udukos' is that it's 'sudoku' but rearranged so that the letters of 'sudoku' (being 123456) are ordered 236541, so right to left on the outside (1-2),moving in one letter and reading left to right (3-4) and then right to left again for the inside numbers (5-6). I don't know if this makes sense, I'm very drunk and it's 3am and I'm watching a sudoku video

[@robertmeadows1657]

Dammit, Joyce.

[@Nighthound]

... and 236541 makes the sandwich total of 9 with the outies being 2 and 3 I don't know why I thought that when I read your comment, but I just did.

[@ZkullShot]

Give this fella a medal

[@pikablue107]

give this medal a fella

[@cjmars822]

“Took me nearly half an hour.” 3 days later I’m still trying to figure out why he started where he did lol

[@danieldreamgazer3934]

I don't get the puzzle. Are there special rules that are different?

[@davidallen1459]

@Daniel Dreamgazer yes, this sudoku includes some special rules in addition to the normal rules. So, besides rows, columns, and 3×3 boxes all needing to have digits 1 through 9, this one includes "Killer Cages" (which are difficult to see here). The the KC are sets of squares whose digits have to add up to certain values. In this puzzle, the KCs are all within the standard 3x3 boxes (no crossing borders), and have to have a value equal to the other KCs in their 3x3 box (so, if one KC in a certain box has, say, digits 1, 5, and 9, which sums to 15, then any other KCs in the box also have to sum to 15 with their digits). Some squares within 3x3 boxes are not part of KCs. The final extra rule for this particular sudoku is that the KCs within each 3x3 box have a value that is unique from the KCs in all the other 3x3 boxes. @Cj Mars This means that the reason he started where he did (in the top right 3x3) is because it didn't have any squares that weren't part of a KC, which means that he could divide the standard 3x3 box total of 45 by the number of KCs in it (three), to figure out that they each shared the sum of 15. His next step, in the top middle box, I think was chosen because it had only one square that wasn't in a KC, so he narrowed it down to the three digits it could possibly be using similar division logic.

[@ronalronal5713]

he started in the top right becuase it was completely filled in with cages so he was able to figure out what the cages were worth in that particular box (15)

[@AFastidiousCuber]

@14:40 5+6 = 13, the things you learn on cracking the cryptic.

[@TheEvenClan]

followed by "1 must be in one of three squares" while marking 4 squares in 15:25 :P

[@the1exnay]

TheEvenClan He was correct though, the top left one couldn't be a 1 so it had to be one of three

[@pierreharris1354]

@@TheEvenClan followed by 5+8= 11 at 21:25

[@idkjessicaig]

Not me staring at my screen for like 30 seconds trying to do basic addition...

[@arpitathomas159]

@@pierreharris1354 actually u misunderstood...it doesn't mean that 5+8 and 3+6 = 11 but 5+6 and 3+8 = 11 cause he's making a pair, so 3 in 1 square and 8 in the other and 6 in 1 square and 5 in the other

[@tciddados]

At 27:07 I enjoy how he places the 9 and stares at the board for a good 5 seconds before looking somewhere else, when the 29 pair that it just disambiguated was one cell to the left, and that ends up being the last cell he fills in the grid.

[@RichSmith77]

That was tough, yet brilliant. I had to give up last night, was too tired for this beast. Managed it this morning, but took around 90 minutes Similar path as Simon, although my reasoning behind the early 9 in box 2 was slightly different. I had the options down to 3,6,9 the same; and the 7,8,9 triple in column 5. This meant 7,8,9 had to appear in c5 or 6 in box 2. If all three of them were in the two cages in those columns in box 2, then one of the cages would have to have (at least) two of the digits, making the cage sum to at least 15. But then all three cages would have to sum to at least 15, breaking the 45 limit on the box. Therefore, one of 7,8,9 has to go in the free cell in box 2, and from the options, this has to be 9.

[@timothybexon6171]

I designed a sudoku with almost the exact same concept a couple of months ago. Instead of boxes, it was rows. Please give it a go. It was fun to make and fun to solve. And it isn't easy. I sent it via email about 2 months ago.

[@piperaislinn2511]

Great puzzle! I'm still learning all the sudoku tricks, but I did attempt this one (semi) on my own, watching a bit more of the video each time I got stumped until he said the slightest thing that could unstump me. I had to step away a few times so I'm not sure exactly how long it took but I think around 2.5 hours. I do aspire to one day get anywhere near your times Simon, but you're a joy to watch solving these, makes it more fun hearing you exclaim about the beauty of the logic as you go along :)

[@vercingetorixmaris8225]

One of the greatest puzzles I have ever steen. Really liked it. Needed a jump start from the video to solve it though

[@Anne_Mahoney]

Yeah, me too. I worked at it for a bit over an hour and got the cage-sums of boxes 1, 2, 3, 4, and 5. Then spaced out on how the 4 and 7 in box 4 fix the place of the 7 in box 1 -- which cracks the whole rest of the puzzle very quickly. I had enough information right there and just didn't see it; gave up and went to watch dear Simon, who got to where I'd got in about 15 minutes, did not miss the essential clue, and unravelled the rest quickly. Still, I had the main ideas, so I'm giving myself credit for a moral victory!

[@Gufnorkian]

This is quite possibly my favorite sudoku-like puzzle. The elegance in the path was just astounding and I feel like I'm sounding like Simon, but it's not intentional. I genuinely loved this one even though I needed a lot of help to get through it.

[@petrhanovec4321]

I love your guitar intros, Simon.

[@raswartz]

I love it when I really get rolling on one of these tough puzzles and then find out that I broke one of the normal sudoku rules. Makes it fun to restart!

[@juliaschmouder4129]

Not me randomly finding this video in my recommended feed and watching the entire thing even though I am very bad at Sudoku and was lost the whole time, but still very much enjoying it

[@matthewcurran9632]

The intro piece is Asturias Leyenda by Isaac Albeniz. Absolutely wonderful piece, and nicely played here👍

[@livedandletdie]

It's the best classical guitar song in my opinion ever to be made. It's truly a nice piece.

[@JohnADoe-pg1qk]

And Shazam recognises it! (outro) 😀

[@samus88]

I thought it was Iron Maiden lol.

[@kimtimmermans873]

I thought it was The Doors

[@paulcook2961]

@@livedandletdie I probably would agree if I hadn't heard every single beginner guitar player ever completely murder it. In some music shops, when you try out an electric guitar, there's a sign saying "no Stairway to Heaven or Smoke on the Water". Well if you try a classical guitar, there's a sign saying "no Asturias".

[@einarhagby3227]

never played a game of sudoku in my life. this is the most satisfying video I've ever seen

[@diy_rabbithole]

14:48 You heard the man. Mathematics has been changed to mean that 5+6=13

[@SimonSideburns]

I just saw that and paused to comment. Glad someone else noticed.

[@tabularasa0606]

His processor just switched to octal for a moment.

[@Nighthound]

"Things you learn on CTC"

[@think_potatoes4945]

he said it was 5 and six because the cage total was 13, but he left out most of the words so it was hard to understand

[@AssemblyWizard]

@@think_potatoes4945 the cage total is 17 tho

[@GreasbroughOperatics]

I have no idea why this was recommended, but I thoroughly enjoyed it!

[@ultimxtely5167]

I am so grateful that I found your channel to please my non existent addiction to sodukos

[@hapawn]

This is an incredible puzzle, extremely elegant. IMO it should be included in the book.

[@alienrenders]

54:07 for me. Took me a while to get started. Once I started putting in digits, it flowed fairly well. Interesting puzzle. edit: Argh... just realized I was trying to eliminate the 6 from the two cell cage in the center box for the longest time and Simon just says "It can't be 15. That's already used in box 3." And I knew that. Completely escaped me when I was solving. I could have saved a lot of time there.

[@smalford-7000]

A great time, well done i only managed to get just under 1:20:00

[@Skyfox94]

Simons brain probably looks like what the rest of Arnold Schwarzeneggers body looked like back in the 80s (no offense to Arnold, love the man)

[@drawapretzel6003]

You mean absolutely ripped? Yes, i can tell the man needs annual cranium enlargements.

[@Skyfox94]

@@drawapretzel6003 absolutely

[@Dysiode]

This was a real joy to watch, not easy, but also not complicated! The maths were broken up nicely instead of having to add up the entire outer ring of boxes, or any number of other crazy things Phistomefel has made you do

[@Zvoosh25]

I think this one needs to be in the book

[@ukjentoversetter2225]

how can these videos be so calm and collected but at the same time as thrilling and exciting as a roller coaster?

[@tillyc2448]

Literally took me 45mins to get it! Such a beautiful puzzle!. Got very stuck on the point where the bottom side two sections were mostly blank. Wish I had your brain in that moment! But got there in the end! Would love more like this!

[@swagman9203]

I really enjoyed watching you work this out. Being fairly new to Sudoku it never ceases to amaze how you guys do this. Well done.

[@matthewender3473]

Wow, that was brutal. I struggled home in 1:07:21, so naturally I went to check on Simon's approach. Pretty much the same, so the difference was that he could generally see the next thing where I flailed to find it. Well done, good Sir!

[@LightDhampire]

1:18:59 for me. Agreed.

[@holm3s2008]

Its such a pleasure watching Simon's mind at work. You can see his genuine joy at solving these incredibly difficult (for most) puzzles.

[@Leogryph]

Great job! The only thing crazier than you solving this in only half an hour is how someone managed to make this puzzle actually solvable

[@OrtugaVorsaikai]

Definitely got this channel for a reason and I quite enjoy watching and now starting to do sudokus again.

[@erickehr4475]

A truly excellent puzzle. Took me 33:03 which I am more than happy with! I don’t know if I missed anything (and I haven’t yet watched Simon’s solve), but I didn’t resolve the needed sum in box 6 until the very end - and a puzzle which can keep a secret that long is exceptional.

[@SpikeMatthews]

I think what I like most about these videos is that you explain things so clearly as you go.

[@orgdotedufilms7633]

I don't think I've ever watched a video and immediately replayed it. Absolutely amazing.

[@lanestreet1431]

I don't know if I get more joy from solving these puzzles or from watching Mark and Simon solve them. Simon, would love to hear more about your guitar and your playing. Slotted headstock, is it vintage? Do you have any others? Really enjoy your playing, ever done it professionally? Cheers!

[@protektor2399]

I'm just happy that I was able to solve the example from 3:10 ... It was the version with the killer clues already put in

[@matthamb1]

Well, I just found this channel yesterday! I liked Sudoku for a very long time, however, I always liked playing the EASY ones - I like trying to fill out the puzzles without penciling in any numbers. I felt like I was guessing when having to use penciled in numbers. I watched this and he starts using very simple logic to solve these very difficult puzzles and he has completely changed my mind about what I was doing! I am now watching to learn the logic behind decisions and how to actually solve harder puzzles. Glad I found this channel!

[@edhunterofmaidengrad]

It's crazy to watch a video of something that took me an entire work day boiled down to half an hour. Love this channel!

[@MoaxLycan]

My partner walks in Her: What you doing buddy? Me, in front of computer hood up: I'm listening to the man talk about numbers and it makes me happy

[@Raven-Creations]

That was an interesting journey. My solve was almost identical to Simon's; I don't think there's much latitude in the solution path.

[@PaulPower4]

I think this sudoku is one of my favourites I've seen on the channel, it's very neat how you can narrow down the possible values that the cages in each box can have based purely on the number and sizes of the cages in those boxes.

[@RufusVidS]

I never thought watching someone solve Sudoku could be such a joy! I need that program he uses to fill in the squares with the Possibles and the Must-Bes! He's so quick at noticing things it's a thrill when I see a combination before he does! (Even though I know he'll be hitting it quite soon after.)

[@HalfBakedLunatic]

Excellent puzzle, really enjoyed seeing the logic on this one. Well done!

[@fbrume]

Really, really rough (over an hour with interruptions). I felt proud of myself for one early insight: after getting the 789 triple in C4, I realized that 7, 8 and 9 had to go into different cages in the upper-middle 3x3 (since the sums were 12, 13, or 14). That pushed a 9 as the sum of that cage, and led to a nice bit of progress until I got completely stuck as I failed to notice the 78 pair in row 3 for a good 20 minutes. (The separate cages for large values was a trick I then used later on the right and I think one other place.)

[@hummakavula3750]

I never cared for the weird variants of Sudoku until I found your videos and saw how enjoyable they truly are. This took me just under 3 hours and I had to observe your 47 constriction from the center to the left box, but I feel very happy having solved it otherwise. Thank you so much.

[@sasukuto]

So I've been playing Killer Sudoku for a few months now, just cause I was looking for a good Sudoku app on phone and it was the best one I could find! Then I got recomended your videos this morning and thought they where really interesting so I've been clicking through a few, only to find this video mentioning they you made this app that I really like! Heck yeah! Keep up the good work! I love the app!

[@Robertius]

Simon 2020 "Maybe Sudoku will be our friend"

[@tedbanning9090]

Wow. That was a great sudoku. I got stuck a couple of times, then it moved nicely once I had most of the cage totals

[@NumbBloodHound0]

I just have to say your absolutely brilliant. Looking at that blank cover i couldnt even begin to think of how to start. And i will say youve gotten me hooked on your videos and on sudoku

[@TheLordReylus]

Love the enthusiasm you provide when playing, makes me want to do more puzzles as I have always been a fan of Sudoku. I purchased the Classic app to get me started again

[@Henri-email-archive]

I have absolutely no idea whats going on but it sounds cool

[@magicalspire]

Would really love if you add the song title and artist to the description when you do guitar intros.

[@aimeenystrom4481]

This was such a fun puzzle! I like going along with you to get started, then seeing how far I can get before I either have to fast forward and use your help, or I can solve it myself. I get a little faster every time. Thank you!

[@patrickolsson6801]

Watching you solve this is so soothing! I REALLY enjoy your content. You're so calm and even keeled about everything! Makes me enjoy the world of Sudoku even more! Thank you!

[@JJ-ew9lq]

This is like watching someone break the enigma machine.

[@ayssky3529]

great movie

[@LBulletDodger]

how can he say "this 5 puts a 6 here because they must add up to 13" and at the same time solve a sudoku i coudnt even start?!

[@julesmcnally7249]

I like to go along and pause and see if I can figure anything out myself. I was very impressed with how much I figured out on my own with this one. very cool puzzle!

[@alexwiles7478]

It’s adorable to hear you go “lovely puzzle” while I’m staring at it in confusion

[@Jay-ch7fp]

First video I’ve seen of this person, they seem cool. Giving me definite Bob Ross/Mr Rogers vibes.

[@lehcim777]

Good puzzle, Cheers from Canada.

[@mullkriicha4433]

First video i´ve seen on your channel, really enjoyed it and i just adore the way you have fun doing this, makes watching it just great!

[@thedansusart]

I really want to try my hand at some puzzles now!! Haven't done one in ages but learning these techniques is super helpful. Great guitar btw!

[@Virtualiz]

I still don't understand why the hell I'm watching this channel AGAIN. Why am I doing this?!

[@stevenlomon]

Because it's amazing? 😅

[@Virtualiz]

@@stevenlomon I'm not saying it's bad or anything. But... There are more exciting things on youtube, I could be doing something more exciting... Yet, I'm watching some guy solve sudoku. Internet is weird...

[@StorymasterQ]

@@Virtualiz Technically, this is a Let's Play. Also, dat accent.

[@brachypelmasmith]

Easier than it looks, and it looks really daunting

[@jenesaisquoi9771]

He makes this look so easy. I needed about 10 hours for this (and made some mistakes while at it) and he just solves it in 1/20th of the time

[@XanthoGrl]

I love playing sudoku and even I thought going into this "how could this many people be interested in a video like this"... This was so engrossing I love it here

[@AaronFBianchiJupiter]

Next: Solving a sudoku with no rules

[@adamcummings20]

I really didn't think I would watch this whole video I did.

[@victornemo8377]

I love the puzzles I Just backed the Kickstarter project cant wait for the book to come out. you guys rock !!!!!

[@foodiemonster8966]

Your voice and energy are intensely calming... I'm glad to live in the same timeline as you!

[@fiferbates2405]

Simon: “I’m really not trying to be an idiot I promise”. Me: How the hell are you an idiot???

[@ariskpriest262]

wow this was my quickest thumbs up ever.

[@XNSever]

I'm not exactly sure how you ended up on my feed, but you just blew my mind.

[@caitlinirelan5641]

This is my first video of this guy's that I've stumbled upon and I thought oh cool it's possible to solve a sudoku without numbers? I got more than I bargained for. I have no idea what's happening but I can't stop watching