A Sudoku Catastrophe
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- čas přidán 16. 06. 2024
- ** TODAY'S PUZZLE **
We have been alerted of a potential sudoku catastrophe. We've never featured a puzzle from by the constructor Meggen033 and it's something that some of you know we need to put right! So tonight we're trying their One-Fog-Nine sudoku - a 159 puzzle mixed with a little dose of fog! And it's a really nice debut (and fairly approachable we'd say!).
Play the puzzle at the link below:
sudokupad.app/wyqe8cjb01
Rules:
Normal sudoku rules apply. Each digit in column 1 indexes the 1 in its row (eg if R3C1=4 then 1 must appear in the fourth column of that row ie R3C4=1). The same rule applies to column 5 digits indexing 5 in its row, and column 9 digits indexing 9 in its row. The digits in a cage must sum to the small clue in the cage’s top left corner. Digits may not repeat within a cage. A black dot between cells indicates cell values with a 2:1 ratio (ie one digit is double the other). ALL BLACK DOTS ARE SHOWN. The grid is partially covered with fog. Correctly placed digits will clear the fog around that cell. No guessing is required.
Jane Street's Bug Bytes puzzle is available here:
www.janestreet.com/bug-byte/
(Simon's solve of this puzzle is on Patreon.)
** NEW SUDOKU HUNT ON PATREON **
We're delighted to share with you a brand new sudoku hunt themed around snake egg puzzles by Glum Hippo. If you've never tried snake egg logic puzzles before, prepare for serious fun - these sudokus are outstanding! Finish by May 20 to enter the competition!
Other treats on Patreon include:
- the Sumgeons & Diagrams sudoku by sunnyjum;
- Simon's latest forays into the world of Islands Of Insight;
- Mark's video looking at the new OneUp puzzle from Rodolfo Kurchan;
- his solve of Region Geometry by Emre Kolotoğlu (3hr 36min long...!);
- and Mark's latest solve of The Times Club Monthly cryptic crossword
/ crackingthecryptic
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▶ Contents Of This Video ◀
0:00 Theme music & puzzle intro
1:38 Simon vs Bug Byte - a new Jane Street puzzle
2:08 Happy Birthdays
3:22 Rules
7:13 New Fog-Of-War sudoku app incoming
7:26 Start of Solve: Let's Get Cracking
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Hey, Meggen033 here. Thanks for the solve and the debut! I'm glad you enjoyed the puzzle. I watch your videos every day and I feel honored to have graced CTC. Thanks again! Cheers and God Bless 😎
That's was a smart puzzle, I enjoy it a lot! 🤗
God bless you too!!!
I felt simultaneously brilliant and dumb when I finally figured out the breakin
You have some of my favorite puzzles on LMD. Keep up the good work!
Thank you for a very enjoyable puzzle!
@@puritan7473 yes, this!
Love how Simon gets carried away with the singing about 3 in the corner and never EVER gets around to placing the 9 based on the index which would have unravelled a ton of the puzzle immediately. :) :)
I got to this part in the video and immediately opened the comments to see if someone else noticed lol
19:00 "It's only easy because I have done loads of 159-puzzles before..." says Simon only to proceed putting in a 79-pair in the bottom row right after a three in the corner, forgetting that the three indexes the nine. But again, that's why I love Simon. Way too genius to spot the obvious.
I try not to be too hard on those type of forgetting as while it is easy to see if just doing it
Then think how easy would it be if I have to concentrating I am doing a video and keeping it going by talking all the time
@@martingriff101 It's only easy when you're not nearly as good as Simon and are just unable to see anything more complicated so that pure indexing doesn't go off the radar. I know because I am that weak 🙂
The pain I had after 18:50 when he didn't index the nine into the third cell.
It's fascinating how Simon goes totally blank microseconds after mentioning the indexing and totally forgets to index. Multiple times during this solve... it was painful at times 😀
Doesn't index the 3 to solve the 79 pairs then doesn't index the 2 as well to solve the same 79 pairs, claims the 9 in column 5 was probably available for ages where it was just seconds ago. At this point I'm convinced Simon's brain is just like an adrenaline junkie but it finds its adrenaline from solving the hard parts of the puzzle, so it doesn't let him do the easy things unless he does the hard ones first. 🤣🤣🤣
I literally yell at my screen saying to pay attention but it cracks me up everytime
The pain I had after around 0:05 when I realised I was being click-baited.
Simmon dont like the obvious one
Simon is so right to marvel at this break-in, what a clever use of the fog and the constraints. Beautiful setting.
I spent as long as Simon's whole video until I face palmed when I found it.
Simon videos below an hour length have become stranger than Maverick refraining from daily taking his plane to buy bread
In America we have the concept of the $100 hamburger which is when Private pilots take a plane for a trivial errand just to get some flying in. I suppose in the UK it would be a hundred quid pie?
I imagine Maverick "parking" his plane by the bakery and then getting inside the plane again with a loaf of bread under his arm
As a newbie to the channel I have to ask who is this Maverik we hear about all the time?
@@SarahLivne There will quite often be someone taking off and flying a plane that can be heard in the videos. Simon nicknamed the pilot, be it one person or many, Maverick. The name is from Top Gun.
@@alexanderhauser1703 oh wow! I thought the Maverick is a plane model ☺️
7:40 Fog of war puzzles? Oh, indexing puzzles…
Yeah, that one threw me for a loop for a few seconds until the explanation.
Those of you ‘shouting’ at Simon about the negative constraint: did you try whispering instead? It worked for me just now…
I thought whispering was green or orange lines. 😸
@@Anne_Mahoneyonly if you whisper in German or Dutch
@@fulltimeslackerii8229 Das konnen wir tun.
That so called "secret" about fog-of-war puzzles actually applies to indexing puzzles ...
I wonder if there is a secret to Fog Of War Puzzles ? (like the solve path comes from the fog revealed - hence the 3 in bottom right cell corner for the 9 index, been mentioned by others but was signposted as the fog revealed
There is no holistic trick for fog of war
Seeing the completed row 3 was very satisfying.
I absolutely loved this combination of rules, especially the ALL black dots constraint to my surprise. I definitely want to do more now.
I feel like the 159 “secret” is one of those things if one fixates on it too hard carries a real risk of at once making otherwise hard deductions easier and making otherwise easy ones harder…
Am I the only one who noticed entropic roping throughout thhe puzzle???
Nope, I spotted it too, but I couldn't prove it had to continue, so it didn't help me.
@@jameshastie3864 I was looking for someone else who noticed it ^^
No, I also came here to ask: what caused this effect actually? Not all 159 puzzles have it, do they? I feel like we are missing something that had we been able to prove earlier in the puzzle would have made it much more trivial...
Take out the Beannys and the trash
Or you don't get no spending Beannys
If you don't Beannys that kitchen floor
You ain't gonna Beannys and roll no more
I think it is caused in every 159 puzzle.. same as when the centre cell couldn't go on the phistomefel ring in a knights move puzzle.. miracle really
Solved it in 23:55. I enjoy FOW puzzles since they focus you on where you need to look, but they're usually a slow advance since you're more often than not placing digits just at the edge of the visible area and clearing only a couple fog cells at a time. Indexing puzzles and other rules that let you place digits at a distance are a nice treat since you're able to locate a digit in the middle of the fog and clear 6+ cells at once (like the 4 in Col 9 at 18:44).
I usually don’t even try the puzzles, but I gave this one a shot and once I got the hang of indexing I found it a very smooth and fun solve
That negative constraint really did a lot of work in this puzzle... Nice and approachable!
Foggy indexing, and I am starting to feel tired. Well, i did manage this in 35 minutes so quite happy with that.
27:44 «I think we're finishing. That might be famous last words»
I love the paradox about «last words».
If you are finishing, it will be close to the last words; however, if you weren't finished, it definitely wouldn't be the last words, because you would have had to continue; while you continue your so called "last words" would be followed by more words..
14:42 for me. quite easy, the negative constrain was very powerful and for once i did not forget about it.
sadly, I forgot about the negative constraint and was stuck for quite a while. When I finally remembered it, the puzzle came together nicely.
@@spauldine same :-) it did a lot of work at the beginning, then it wasn't needed and halfway the puzzle I was stuck for a while until I remembered. Good puzzle though, I like indexing puzzles!
I love it when Simon delves into the technical jargon.
Loved it! The interplay between the 159 and the negative constraint on the black dots made the solve absolutely magical. I am now going to watch Simon do it...
Fantastic puzzle! Really enjoy 1-5-9 puzzles. Makes me feel smart. Keep them coming!
Really enjoyed this puzzle. I'm usually only a spectator to Simon's puzzle's since I simply don't have the chops (yet) to do them. But, this was very pleasantly approachable.
How refreshing to see an "easy" puzzle once in a while.
It allowed me to watch the vid during the day, and not lose 2 hours of sleep as I usually do.
Thank you again Simon. I recently discovered CtC and , although I wasn't much of a sudoku fan before, I'm slowly becoming one.
So happy he gets a 3 in the corner that he forgets it's an index
Rules: 03:29
Let's Get Cracking: 07:30
Simon's time: 21m20s
Puzzle Solved: 28:50
What about this video's Top Tier Simarkisms?!
The Secret: 5x (07:34, 07:37, 07:43, 07:46, 07:48)
Three In the Corner: 3x (06:17, 18:49, 27:12)
Chocolate Teapot: 2x (24:19, 24:25)
Maverick: 2x (24:27, 24:29)
Knowledge Bomb: 1x (03:42)
And how about this video's Simarkisms?!
Lovely: 11x (01:47, 01:47, 03:14, 11:24, 11:27, 12:30, 12:33, 18:57, 18:57, 26:09, 28:44)
Ah: 7x (10:48, 10:48, 14:40, 16:38, 18:46, 22:05, 23:30)
Sorry: 5x (04:17, 14:16, 19:18, 20:53, 25:07)
The Answer is: 3x (11:35, 11:51, 22:21)
Pencil Mark/mark: 3x (10:54, 15:28, 25:02)
Clever: 2x (24:44, 24:50)
Beautiful: 2x (29:17, 29:17)
Hang On: 2x (12:05, 12:33)
Cake!: 2x (02:54, 03:19)
Weird: 2x (04:26, 10:08)
In the Spotlight: 1x (18:53)
Stuck: 1x (21:06)
Take a Bow: 1x (29:31)
By Sudoku: 1x (23:48)
Shouting: 1x (05:58)
Famous Last Words: 1x (27:43)
In Fact: 1x (06:29)
Obviously: 1x (23:59)
Wow: 1x (28:54)
Losing my Army: 1x (19:50)
What Does This Mean?: 1x (06:02)
Most popular number(>9), digit and colour this video:
Twenty Seven, Thirty Six (7 mentions)
One (83 mentions)
Black (35 mentions)
Antithesis Battles:
High (6) - Low (5)
Black (35) - White (0)
Column (23) - Row (15)
FAQ:
Q1: You missed something!
A1: That could very well be the case! Human speech can be hard to understand for computers like me! Point out the ones that I missed and maybe I'll learn!
Q2: Can you do this for another channel?
A2: I've been thinking about that and wrote some code to make that possible. Let me know which channel you think would be a good fit!
Noticed that there’s a handy time copy button now, which is very cool! I managed a solve under 29 minutes this time (28;36) and really enjoyed the puzzle. As you say, Simon, the break in with the single black dot in the row is very clever and well pointed to by the 9 cage. What a lovely puzzle c:
I've never tried one of these puzzles before but gave this one go and it was a blast, thanks for sharing!
Indexing puzzles are very cool. Every digit always references every digit in columns. Not just 159, but all.
Very approachable and really fun! Thanks!!!
I'm used to negative constraints, but the rules here saying "shown" SO LOUDLY is making me second guess if it means 'shown *from the start*' or if more could be under fog. It doesn't say from the start, and should if it means it, but it's drawing SO much attention to what's otherwise a normal rule that i can't help but wonder...
Ok, a single digit in and there are more. Please do not emphasize rules for no reason, it can make it more confusing rather than less.
11:34 for me. The first step seems pretty obvious in hindsight, but it actually took me a couple minutes to see it. Very clever idea, great puzzle!!
7:45 Simon describing the indexing secret as the fog of war secret lol
This puzzle was superb. Please do more 2 to 3 star puzzles!
Thanks for a great video Simon. I loved your frasing at 11:20-11:25 about the deduction of the first digit it made the deduction possible for me to make for myself. Thanks.
Took me just under 27 minutes, a good 10 minutes of which was figuring out how the break-in at the start of the puzzle works. Really cool, indexing puzzles always make my head hurt.
After spending over an hour on this puzzle stuck beyond my knowledge, I turned to the video and realized after only 14 minutes of Simon talking that I was forgetting about indexing the 5 AND 9! I was trying to solve it with only thinking about indexing the 1! ohhhhhhh facepalm...
A fantastic solve, Simon. You went through the logic so smoothly, and never truly got stuck. Side note, I don't quite understand why some people are so amused by you not spotting sudoku stuff when you're not even stuck. Surely, it's normal that people spot things in different orders. I imagine if you run a channel like this, you want to get the logic of the puzzle across, so you have incentive to prioritise the more complicated deductions over the mundane ones, to make sure you don't miss any. You do this extremely well imho. I still remember Clover's delight about this in her setter video. Thanks!
I think that just after 'let's get cracking' Simon cracked his own words : he said 'fog of war puzzles secret' instead of '1-5-9 puzzles secret'.
I loved that. Despite the fog clearly showing where you had to look at first it took me an age to work out the break in. After that it flowed like a dream.
Took me 17 minutes.. The negative constraint is almost too powerful. But a 1-5-9-Fog combo was very nice to try!!
65 minute solve for me, I tried it a little bit and got stuck, then I listened to Simon for 11 minutes and something clicked in my brain and after that it was very approachable (the thing that clicked was where the 2 goes in column 1)
Got it in 20:21, just barely below Simon's time. I know this puzzle was on the easier side, but I'm still proud of that!
Wonderfull puzzel, very doable, also loved watching the solve it afterwards.
What a lovely puzzle! ❤
I ❤ foggy puzzles & 159 puzzles! And creative expressions like a “floating extended x wingy thingy” 😁
Brilliant puzzle, lovely foggy.
oooo Meggen's puzzles are great!
Great puzzle, super smart! 😊
Nice one, solved in 14:39. I'm not normally a fan of 159, but the way the rules intersect here with fog-of-war forcing you to focus on specific parts of the puzzle, it works well.
I finished in 18:13 minutes. I've been on a roll with Fog of war puzzles today and this was a great one. The negative constraint was really fun to think about while in the fog. I really liked this puzzle and logic. As always, it feels good to beat Simon's time, even though he has to explain things to the audience. Although, to make sure I don't mess up, I pretend like I'm making a video for CTC and explain things out loud. And yes, that does include me singing three in the corner. Great Puzzle!
Simon started doing Sudoku in a Sudoku puzzle, instead of indexing the 9 in the bottom row.
Lovely puzzle, done in 11:19, the negative constraint is (as always) extremely powerful.
Absolutly love this puzzle
Fantastic setting .. the use of the word SHOWN instead of GIVEN was a clever choice of words as it made me instantly ask where the 2 goes in column 1 🎉
Fun puzzle. I generally like the 1-5-9 puzzles, always seems to do well with that rule.
Hooray! I actually solved one! Albeit a lot slower than Simon. I got the early breakthrough quite quickly, then my inspiration sort of dried up. Fun puzzle!
26:48 solve! Looked a bit overwhelming at first so I started watching the video, but after the secret about indexing puzzles everything flowed quite naturally, albeit slowly. Pretty fun and approachable one overall.
I had a lot of problems with this puzzle because I felt the Low Mid High set theory had to apply everywhere but didn't know if it was a baseless deduction... also there's the fact that not only the columns 1, 5 and 9 index their number in the row, it's that EVERY column indexes its digit in the row (don't know if that's by nature of 159 puzzles in general or if that was the setter's intention but I wanted to point it out). Had a really good time resolving either way
22:49
A really good use of the fog of war with indexing sending information to far-flung as yet uncovered regions. I almost forked badly considering where 2 in box 9 could be before realising that I could not see if or where any dots in the box were.
I'm rather surprised Simon didn't say anything about the crazy amount of roping in the puzzle. Made a couple of deductions a little easier.
In programming, the technical term for the "möbius strippie loop" is recursion. Or you could call the reference "recursive".
When dealing with recursion in programming, recursion is either causing a bug in the form of an infinite loop, or recursion is used intentionally where a piece of code references itself but comes with an end point. An example would be code that generates a Fibonacci sequence up to N numbers long.
Long time since I've gasped at a break in but this is a beauty. Negative constraint for the win...
Was able to complete in 16:36 (conflict checker off), struggled with this a bit as I kept forgetting to keep close attention to BOTH of the indexing and negative black dot constraints. Still very enjoyable, many thanks to Meggen033 for the puzzle!
I like the logic that lets the puzzle solve so cleanly! My time today was 17:03, solver number 14735.
I usually find these 159 puzzles to be over-constrained. There always seem to be many routes to get any digit. This is clearly a lovely puzzle but it does seem to have this property.
Very enjoyable!
I do wish in index puzzles like this, Simon used a colour or something to indicate when he'd finished using a digit to index another digit... It would make things so much easier 😅
Love row 3 in this puzzle :P Also, it just occurred to me that there weren't actually any 36 pairs, crazy!
In the final correct solution of any 1,5,9 puzzle will have the three low digits, the three middling digits and the three high digits always grouped together in the same box in a given row. This fact allows several short cuts in the solve.
Finished in 27:38; only needed Simon's help to remind me when I got to the first 4-5 domino, and I had forgotten that the 5s and 9s are indexed too. :D
9:39 for me today! Indexing puzzles are always a blast
That was fun! 😀
Wow, this is the first time I've done a puzzle in the same time as Simon just about, 34 min!
If I were to venture a guess, I'd assume that the reason some people aren't as keen on fog of war puzzles is that they very easily become very linear experiences where the fog obfuscates everything but exactly the one clue that you need to proceed. Granted, genius puzzle design can create pretty much the same result even without fog of war, but there's always, at the very least, an illusion of being able to tug at different strings or being able to apply some advanced logic that the constructor may not have intended, etc.
34:04 for me, took me way too long to figure out the 2,1 dot at the start. Everything flowed nicely after that, especially with the negative constraint
This was very lovely, a fun puzzle, and a good solve. I am coming to this a day late because of having been traveling, and between when you solve this puzzle and when I did just now there have been more than 8,000 solves. No doubt this is due to the exposure that sudoku puzzles get from being featured on CtC. I hope that everyone clicked the little heart, as I did, because it was good puzzle. I noticed that it has roping, and I think I recall there being roping in other 1-5-9 puzzles I have done. Is it an inevitable result of the indexing constraints? Or was it built into this puzzle with the use of the black dot relationships? Regardless, I did not "use" it to solve, but it definitely was there, almost as confirmatory as the removal of fog that I was on the right track. Thank you, Simon.
Yesss a fog of war puzzle!
Enjoy watching the video everyone😊
Finished in 15:47. A lovely fog of war puzzle as always.
It seems that every column can form valid column indexers in this puzzle
For me it looks like a rule to 159 puzzles
Can we have king and difficult puzzle solves?! I love those! Crux by Jay and the 13 cage one!
Simon is a Supertramp fan. He always takes the long way to solve! 😂
Why should he care if he's feelin' good?
The indexing side made this puzzle way quicker. Its funny you noted that programmers would tend to have an easier time with this kind of puzzle because I immediately started to mentally fill out the board between the patterns that appear in the squares and following the indexing rules.
It is just partly true since programmers are bitten by the curse of 0-based indexing.
@@danielszanto2955 Some of us have no problem putting a null/nil/None value into position 0 of an array/list when we want to represent something that exists in the 1-based outside world. 😉
23:23, did it in little bits while at work, not sure if it slowed me down having to realign myself or sped me up by letting me think about the next step, I'll call it even.
A fitting debut from Meggen, a fairly easy 10 minute solve, although I'm still not entirely sure what the catastrophe that was averted was. Hint ... this puzzle is a lot easier when you remember to use the negative constraint on the black dot! The 1-2-3 "chocolate teapot" you put into box 6 were resolved from the get-go by virtue of the 3 having to play gooseberry between then 1 and 2.
The catastrophe would have been this setter never getting a feature 🙂
Yay! This is the first one I've solved in a while
Nobody noticed row 3 being just descending order?😂 lovely
Thank you Simon and Meggen033! What a nice puzzle!!! Only 2 questions if anyone can answer for puzzles with indexes in columns 1,5 and 9. First, the "entropic phenomenon" that it is discribed by Simon at the start of the solution is applicable in all columns of the puzzle? Second, in sucl a puzzle, do we have always roping in all rows of the puzzle?
another one of those 159 puzzles where the indexing actually applies to every column/digit, not just 159. Is that coincidental or is it somehow a feature of 159 puzzles?
I just noticed that after someone else pointed it out!!
yes! I was hoping for fog of war DLC
13:43 approachable, I liked it!
Can’t wait for the fog of war app.
So sad i can't get it due to Google play's restrictions in my country
I love to watch you play sudoku.
Your brain is as mighty as Goku.
Just one thing doth grieve.
It's that I can't leave
Any comment while watching on Roku.
33:47 ... best puzzle I've played in a lonnnnnnng time. Beautiful!!
12:27 ... much fastere once I know the break in
25:08. Great puzzle and i didn’t even have to do the entropic logic. Just Normal sudoku and indexing logic
It looks like those 1-5-9 sudoku are fully self-indexing, e.g. every column indexes the number corresponding to its column number, it's not limited to 1/5/9. Is it true, is it provable? Because if yes it would be an extremely powerful tool to solve them.
22:30 Your is faster than mine, I needed totally an hour for the whole sudoku. And the indexing numbers were confusing me. But I waited long time for you see your "3 in the corner" is an indexing 3. Maybe just cause i solved the sudoku before I watched the video.
Is this the ropiest puzzle ever? Not only was there complete roping throughout, it was the same sets of numbers in each row, and the pieces of rope were consistently placed in each horizontal set of three boxes. I guess you could call it ent-ropey. 😆
Also in the columns we have entropic repetition
Well, a 159 index is by definition an entropy puzzle. As columns 1, 5 and 9 must have entropic repitition. Also: "it was the same sets of numbers in each row" I think you will find this in every single sudoku ;)
@@ninjamunkLOL, yes, that's true about the rows in every puzzle. But what I meant was the position of each piece of each row was consistent. Like the first three boxes have the 456 piece in rows one, three, and two, and the same is true for the middle three boxes and the lower three boxes. Usually with roping, the positions end up shifting around more from box to box. I just thought it was neat that there were so many consistent elements to the solution. 🙂
As someone else pointed out in a reply on another comment, the columns also fully indexed the digit positions. It was not just the 1-5-9 columns
@@BrianZier Yeah, that was a really cool aspect too!
Simon missed that the "3 in the corner" indexed 9. That could have gotten several digits pretty quickly.
More Beans 🥄
He's a very smart man, but it seems his RAM is quite small and singing the song takes all of it.
I thought this was going to be easy when I saw the video length 😀