Reddit Recommended This Puzzle...

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** TODAY'S PUZZLE **
We've had lots of recommendations from Reddit users to try Mystery Killer Primes by Shintaro Fushida-Hardy. It's a 5x5 grid with a beautifully simple ruleset. The puzzle itself is a joy (and very approachable) and feels almost like a discovery. What a debut!
Play the puzzle at the link below:
sudokupad.app/Jr8MFGh6Qf
Rules:
Each row and column contains the digits from 1 to 5 once each. The digits in each cage sum to a prime number but no two cages sum to the same prime. Digits in a cage MAY repeat.
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
** GET OUR FOG KICKSTARTER DELUXE & OUR BOOKS **
Check out this link for the kickstarter books and Fog Novella we've created over the years:
coffeebean.games/product-cate...
▶ SUDOKU PAD - Use Our Software For Your Puzzles ◀
You can input classic sudoku puzzles into our software and help support Sven, the programmer responsible for the wonderful user interface we all use to play these puzzles everyday. The app also comes with 12 handmade puzzles from us:
iOS:
apps.apple.com/us/app/svens-s...
Steam: store.steampowered.com/app/17...
Android:
play.google.com/store/apps/de...
ALSO on Amazon: Search for “SudokuPad”
▶ Contents Of This Video ◀
0:00 Theme music & puzzle intro
1:37 Steve Pemberton's crossword
2:34 Dungeons & Diagrams Stream
3:01 Happy Birthdays etc
7:20 Rules
8:40 Start of Solve: Let's Get Cracking
▶ Contact Us ◀
Twitter: @Cracking The Cryptic
email: crackingthecryptic@gmail.com
Our PO Box address:
Simon Anthony & Mark Goodliffe
Box 102
56 Gloucester Road
London
SW7 4UB
(Please note to use our real names rather than 'Cracking The Cryptic'.)
**************************************************************
▶ CTC FAN DISCORD SERVER◀
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▶SEND US PUZZLES TO SOLVE/CONTACT US◀
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▶FOLLOW US◀
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We also post the Wordle In A Minute videos on TikTok.

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Опубликовано:

14 июн 2024

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Комментарии : 215

@shintarofushida-hardy4739 Месяц назад

Wow! Thank you for the feature! I definitely agree that it felt like a discovery, the setting-experience was almost all spent trying to find a "valid final configuration" (rather than thinking about the logic necessary for solving it.) It was an amazing coincidence when the final result was logically solvable. Glad you enjoyed solving it as much as I enjoyed setting it!

@stevenape377 Месяц назад

Loved it, wonderful little puzzle!

@sacredsock8031 Месяц назад

I wonder if the same trick is possible for a bigger grid, something for Simon to really get his teeth into?

@Qurqirish_Dragon Месяц назад

@@sacredsock8031 Maybe, but not a full 9x9; the sum of all primes less than 45 is less than 405 (why 405? it's a secret....🙂), so either repeated digits must be allowed, or there would need to be uncaged cells.

@meamemg Месяц назад

@@Qurqirish_DragonBut 45 isn’t a constraint in a 9x9, just as here where one of the boxes summed to more than 15.

@Qurqirish_Dragon Месяц назад

@@meamemg As I said, repeated digits would have to be allowed, and I also checked - there wouldn't be anything nice for the break-in like this had; 405 is hard (if possible ) to get from even consecutive primes. Definitely not the first X primes (skipping 2, of course)

@martinepstein9826 Месяц назад

The break-in of this puzzle is wonderful. Not super difficult but it teaches you something new.

@cryam6428 Месяц назад

Yeah it's just fun to see how elegantly the prime digits and the sudoku rules overlap.

@eyvithorgeirsson6028 Месяц назад

Sometimes you don’t need to have very complex logic for a puzzle to be fun

@aaronwelch5391 Месяц назад

While solving this, I just today noticed that the "3 in the corner" confetti pattern is unique every time. I don't know why, but that made my day. Cheers to Sven for that little nugget of goodness. Makes the ol' secular 3 even more special 🙃

@bosslca9630 21 день назад

I love the approachable out-of-the-box Sudokus like this. I didn't do the 'whole puzzle sum' to get the secret sums of Primes figured out, but it's amazing how effective min/maxing cages can be in a puzzle like this.

@davidalderson Месяц назад

I also coloured the cages different colours after finishing this lovely puzzle. Simon has taught me well.

@TheGreatSpanishBaldwin Месяц назад

I colored them all first 😂

@SimonStienen Месяц назад

@@TheGreatSpanishBaldwin And I actually took the middle ground and instead assigned the colors to the different potential primes, then kept on coloring the cages accordingly. 😹

@chris5619 Месяц назад

Simon was so sure of himself today that he didn't even check the answer!

@penningmeestercgkdelft9159 Месяц назад

Yes indeed ;-)

@navster100 Месяц назад

I mean it was pretty simple logic and he did technically check it himself at the end even if he didn't use the checker

@LorisLaboratory Месяц назад

Jumped right in to try it when I saw the shorter time 😆 Very enjoyable!

@nlatimer Месяц назад

I saw your comment and decided to do the same for the first time ever

@VacantPsalm Месяц назад

So THAT'S where the "3 in the corner" thing comes from. I feel like that was an even bigger secret than "the numbers 1 to 9 add up to 45."

@SenselessUsername Месяц назад

Yeah Mark doesn't do the singing, only Simon.

@chipsounder4633 Месяц назад

There has been an occasion or 2 where Mark had had a yodel 😂 🎤 I think proving it's position should be sung when you get 2 3s in opposing corners.

@benwhite5734 Месяц назад

@@SenselessUsernameMark sings sometimes, just not every time. Also sometimes he'll say the full lyric but without singing.

@javimartinez1014 18 дней назад

Wait when did he say it? I cant find it in the video I really want to know >-

@ashleydampier4745 Месяц назад

My goodness, I feel so star struck!! Thank you so much for the very warm and kind welcome to the UK! And thank you Emma for the shoutout. It really made my day ❤️ P.S I hope you all enjoyed the warm weather I brought with me from sunny SA😉🌞

@user-gj5uc4yx3i Месяц назад

In the US today is Mothers Day. Upon seeing the length of the video I had the thought that Simon may have been saving this puzzle for today so he would have more time to celebrate the Mothers in his life. Silly bit of nonsense but I do hope all the Mothers watching have enjoyed the day regardless where you call home. Fantastic Puzzle!

@ritalex22 29 дней назад

This was the first puzzle you've posted that I managed to solve, I'm so proud 😭

@Bandit-ou3ld Месяц назад

Hey Simon, I have been a long time viewer and I just wanted to say that I love your videos and especially shorter ones like this. Keep up the amazing work! I also was wondering if you have any more fog of war puzzles planned? Those are my favorite to watch! Anyway thank you so much for the amazing videos!

@CrackingTheCryptic Месяц назад

Thank you! We have a whole app of Fog Of War puzzles almost ready :)

@settralives Месяц назад

@@CrackingTheCryptic Sounds great, will they be approachable? I'm still very inexperienced!

@Alex_Meadows Месяц назад

@@settralives There have been two GAS fog-of-war sudokus posted on the Discord, both of them fairly recently - 07 December 2023 and 08 February 2024. (There was also one on 01 April, but that was Philip enjoying himself).

@angec9908 Месяц назад

Of course Maverick just took off. I’m convinced he’s got your office bugged.

@randommusic4567 Месяц назад

Nah, he knows that Simon post's these videos at 8.30 each day

@daveturner5305 Месяц назад

@@randommusic4567 Worse the control tower spies on 'im! 😁

@13vatra Месяц назад

Of course Mark knows Simon's schedule 😜

@jonotick 8 дней назад

That was awesome! Spent 10 minutes or so thinking about what everything had to be, then worked out what c1r1 had to be, another minute or two of pencil marking and then filled out the whole puzzle to finish in about 15 minutes! I have always wanted to make pretty much this exact puzzle but never considered anything other than a 9x9! So glad someone else did!

@erp1011 Месяц назад

Great little puzzle. 28 mins for me. Not the usual 3 day marathon it takes me to solve one of Simon's 50min videos. Now to watch the professional do it

@gaboratoria 14 дней назад

That was pretty fun It's cool how we each approach a problem from a different angle

@chipsounder4633 Месяц назад

Amazing how a base premise for a puzzle can yield such amazing logic. The mini miracle.❤

@olivier2553 Месяц назад

It was approachable, but I got stuck with the idea that the 19 was a 14455 cage, not envisaging the 13455 solution and got nowhere from there (all my cages wanting to be 11). I am terrible with cages/killer.

@navster100 Месяц назад

U dont even need to know the sum of the grid to figure it out. I just counted the number of cages and then looked at the maximum and minimum cage values and there were exactly the same amount of prime numbers as there were cages

@nerdygirltaylor 25 дней назад

I figured it out by realizing the singular 5 cage in the puzzles max value was 21 iirc and the max prime was 19. Meanwhile the minimum prime was 3 bc 2 cannot work. And then saw the number of primes remaining was the number of cages (I absolutely pulled up the list of prime numbers rather than thinking about that myself lol)

@navster100 25 дней назад

@@nerdygirltaylor that's basically what I did other than pulling up a list of primes

@MattYDdraig Месяц назад

3:12 A nice little numerical oddity but pretty much fills itself in after a moment's thought.

@n8_n Месяц назад

4:31 for me, probably my fastest ever solve relative to a CtC video. Realizing the 75 logic immediately helped a lot, it flowed from there.

@ElectricFury Месяц назад

Yeah, that logic held me back for ages until I realised and then it all flowed naturally from there

@Okkebeltman День назад

i did not realise the 75 total, but got to the same answer in a similar way. I found max prime (19) and min prime (3) quite quickly. Just made a list of all primes between 3 and 19 and found there were 7 options, and 7 cages.

@mister-8658 Месяц назад

12 minutes and 17 seconds the first time I got a faster time than the CTC video length.

@katiekawaii Месяц назад

👏👏

@gJonii Месяц назад

I got 14min! I just heard breakin is cool, so had to try it before watching the video.

@huttj509 29 дней назад

I got 6 minutes. Something about this one just went *kerchunk* in my brain and just flowed quickly enough I thought I had to be missing something.

@gianlucatartaro1335 28 дней назад

Wow, this was the first time I have EVER solved a puzzle faster than Simon! Granted I know he takes the time to explain his reasoning, but considering I can often take 2-3x the amount of time on some puzzles, this feels great 😅 I honestly got it by listing out all of the primes that the squares COULD be and quickly realized that 3-19 were the only primes possible. I then figured out where the 3 was and that it was 1,2 and that led me to narrow down which one was the 5 of the triples and narrowed it down to 2,1,2. After that, everything else just kinda fell into place without any other extremely hard thinking 😅 SO HAPPY ABOUT THIS MOMENT!

@JoshuaPullin Месяц назад

First completed puzzle from the channel for me, decided to give it a go after seeing the video length. Thanks for bringing something new each day!

@SuperCraft1999 Месяц назад

This is the first time I tried finishing the puzzle before watching you and I got it! It was great fun playing and watching you afterward I realise how lightning quick you were completing it. Bravo

@n0bl3hunt3r Месяц назад

Really nice to have a short video and primes are such delicious numbers.

@VeritasUnae 10 дней назад

Came back to tackle the “precursor” as it were to the other solve and was very pleased with a reasonable 11 minute solve. Now do I dare attempt the 6x6? Maybe tonight, haha. Thanks for sharing these fantastic sudokus, Simon, and kudos to the setter for a wonderful little problem.

@Moker49 Месяц назад

I gave another shot at one of these easy puzzles. I haven't been able to solve any of them. I made a logic mistake somewhere, got stuck, and had to start over about 40 mintues in. In total it took me an hour and a half. Kind of discouraging that the easiest puzzle still takes me so long to solve after watching so many solve videos. But at least I solved it I guess.

@anaayoung9142 Месяц назад

Yes!! Usually I have trouble in this kind of puzzle, but I am happy to be able to solve this one alone! Thanks 😊

@philipphanslovsky5101 10 дней назад

I loved this puzzle. Completely new rule set to me but it becomes very obvious what to with a bit of thinking. Very elegant! The very first time I solved it in similar time as Simon

@gordonglenn2089 Месяц назад

What a mathematical delight! And a very smooth solve, after the introductory calculations.

@ClairvoyantTruth Месяц назад

Learning Sudoku it's the odd deep knowledge that trips me up.Simon's logic all makes sens, but I had to look up the list of primes, slowly work it out and I didn't understand, but Simon's logic was sound. That's a deeper knowledge that is hard-fought knowledge

@emilywilliams3237 Месяц назад

Very fun - thanks, Simon!

@dinane Месяц назад

Delightful! Thank you! I enjoyed realizing how to start and it was fun to the end. A nice quick brain teaser.

@TheDingus42 Месяц назад

One of the few ive been able to solve off the bat s very enjoyable little puzzle

@acanimations1223 Месяц назад

But he didn’t check if it was the right solution, how will we ever know?! 😰

@CrackingTheCryptic Месяц назад

I realised that after I stopped the video. Sorry. I do think it's correct though.

@penningmeestercgkdelft9159 Месяц назад

It is correct indeed, as many can tell who have finished the puzzle as well meanwhile 🙂

@JohnGottschalk Месяц назад

Such a clever lil puzzle, nice and approachable, feels like a lot of more complicated ones you've had here, but a lot easier to get into.

@gustavosarrafflodi7659 Месяц назад

Hi! Love the channel and the apps. Just finished all the miracle sudoku on the app - 583 stars🎉🎉🎉. Keep it up guys, you are my nightly therapy!

@ThomasHDBass 24 дня назад

Nice little puzzle - how conveniently the primes add up 🙂 Instantly realized the sum, so it unravelled quickly, 4:33 for me.

@glum_hippo Месяц назад

Nice discovery from Shintaro! Enjoyed that

@Uncle_Mel Месяц назад

First puzzle I dared to attempt. Took me a notepad to write out all valid solutions for 5-19 without duplicating more than once. Took me 25 minutes :)

@SomethingWellesian Месяц назад

10:22 for me. Not as fast as a lot of solvers on here but I often struggle with more mathematical puzzles and this was my first time solving a puzzle faster than the video duration, so I’ll take it!

@JediJess1 Месяц назад

This should be fun! Anything less than 9×9 excites me

@evergreentree8042 18 дней назад

I'd placed the two in the corner before I'd worked out what all the primes were going to be and was amazed how you placed half the board before even getting to that. Isn't interesting how everyone's brains work differently?

@Landis963 Месяц назад

40:24 for me - had a devil of a time trying to keep the 19 cage from mucking up the rest of it.

@longwaytotipperary Месяц назад

It’s been hot in Georgia, USA since March! Nice puzzle!

@davidrattner9 Месяц назад

Fun, neat puzzle Simon.

@francoisduez601 Месяц назад

9:47 Very nice approachable puzzle! ❤ First time I solve a 5x5 sudoku I think 😊

@roccov3614 Месяц назад

I liked the progression of discovery in this one. I loved it.

@DevilishlyDutch 26 дней назад

About 12 minutes for me, and what a lovely puzzle indeed!

@brianarsuaga5008 Месяц назад

This was WAY more difficult for me than the video time suggested it would be. I went on a long, LONG tangent trying to do parity tricks (since of course, all primes but 2 are odd and you can't make 2 here). Then it took me a long time to start pencil marking 345s to reduce options in the three cell cages! Argh! Really fun!

@Shaun742 5 дней назад

I tried this and didn't really get anywhere, then started watching the video and as soon as Simon started talking about the sum of the grid and possible primes at 11:00, I was able to go back and finish. The first sudoku on this channel that I've been able to do! (although I obviously cheated by getting the starting idea)

@iamjeramy Месяц назад

Man, I didn't even use the secret! That's so much easier! I really should have thought of that. I laboriously worked through which cages could make which primes, and the 7-cage needing the 1.

@tribin82 Месяц назад

this really just felt like a sudoku without box logic. it took me about 25 min because i kept forgetting about the repeated digits in a cage and made some mistakes along the way because of that. fun puzzle though

@tylerowens Месяц назад

13:31 as a mathematician this was a very fun little puzzle

@chocolateboy300 Месяц назад

I finished in 11:43 minutes. Calculating everything in my head was very fun as this wasn't a difficult puzzle. It had some really nice logic to start with prime number 3. I really enjoy these short and sweet puzzles in between doing massive solves. Great Puzzle!

@BigDBrian 17 дней назад

This is the first time I have tried one of these puzzles before watching the video. It took a leisurely 24 minutes and it was well worth it =)

@BigDBrian 17 дней назад

it's very interesting to see the different approach. My first digit was the top 5 in the T shaped tetromino.

@nathanmays7926 Месяц назад

Let us never conflate elegance with simplicity. This is beautiful.

@reddemunn Месяц назад

Very cool puzzle with a simple idea.

@sampathkumar-ej7xl Месяц назад

A gem of a puzzle with simple rules that earn your respect once you get started.

@Khetroid Месяц назад

I kinda did this in the opposite direction, starting by identifying the 19, then 17 boxes and started placing digits from there. 3 and 5 were way later (even though 3 should have been obvious).

@kwuite1738 Месяц назад

I approached this puzzle from a different angle. I started with determining the number that would have to start outside the first column group to make the group a prime number. After determining it was 2 or 4, I spent my time trying to determine if the line group sum was 11 or 13.

@Probba Месяц назад

I got it in 3:08! The trick is to assume everything is minimized and wing it

@josephbentley1300 Месяц назад

7:52 for me, what a neat little puzzle

@DarrenNakamura 24 дня назад

Finished in 16:14. Neat little puzzle.

@philc2729 29 дней назад

Great puzzle. To be honest, I had taken a break from this channel because the puzzles were getting obscenely difficult for a novice. It is good to vary the puzzles with some clever but approachable puzzles as you indicated.

@DaigotsuSoetsu 17 дней назад

70 minutes for me, I felt like I was on the right track the whole time but had to do a lot of guessing and checking other cages. I was able to rule it down to 7 primes pretty quickly but had to write down a lot of different combinations.

@evetheeevee2977 Месяц назад

8:07 really fun! I liked it ^^

@ElectricFury Месяц назад

This took me 28:16. I spent over 17 mins before I realised that there were only 7 unique primes and could actually place a lot I'd already worked out as "possible". Then I just kept making mistakes, I think the allowed to repeat rule was messing with my brain because I kept repeating in rows and columns too by accident.

@piarittersporn Месяц назад

Beautiful and funny little puzzle.

@PennyLapin Месяц назад

I solved the puzzle in 10:16. Very nice and sweet puzzle. I really like how this puzzle takes a twist on pencil marking and the number groups like pairs and quadruples, having 4 regions take up 4 possible prime numbers and force a 3 sum and 19 sum region. It makes for a very comfortable solution path when you spot it.

@Rach881101 Месяц назад

17:46 for me. Nice puzzle!

@Sam_on_YouTube Месяц назад

I went to check if this one had to be the lowest possible numbers and in the process of checking, I accidentally solved it. 5:46.

@dikinebaks Месяц назад

10:38 fun little puzzle easily solved by asking the questions: what are the minimum-maximum primes to write-in the boxes and how many boxes are there? Then the numbers just fell into their places.

@grahamania Месяц назад

00:10:34 for me. Very fun puzzle! Nice how good logic can fit into a small puzzle. Kind comment.

@praematura Месяц назад

Initially I couldn't add the total of the whole grid correctly and was confused... 😅 Then I realized what I did wrong and it went very fast from there, finishing in just 4:36 (conflict checker off), much faster than I expected! Very fun puzzle, many thanks to Shintaro for it!

@jordanhibbits5431 Месяц назад

5:55, great, approachable puzzle!

@BozoTheBear Месяц назад

Loved this! I solved it with help from my 9yo daughter - thanks, Shintaro!

@WhammeWhamme Месяц назад

At 10.34, squeaked in faster than Simon, yay! Now to listen to him...

@Kinada Месяц назад

It's interesting how well it adds up. I think a 6x6 grid would need to drop the 3 and have a single cell 2 cage to make it work and a 7x7 would take single cell 1 cage. 8x8 looks like it's off by 9 and a 9x9 is off by 14.

@austincellar Месяц назад

Approached, and solved. Thanks for showcasing this one!

@psiphiorg 8 дней назад

A lovely puzzle indeed! My time today was 4:49 (alas, not a prime number of seconds, although it is square, 17²=289=4:49), solver number 13230.

@samgillmusic Месяц назад

Great ruleset, very approachable - I solved in 11: 17

@irc_ninja6906 Месяц назад

14:29 For me. Awesome puzzle !

@chromaticcaos Месяц назад

Got some help breaking in from simon (told me to look at 75) but I figured out which prime numbers I needed on my own. Ended up solving in 15:16

@RichSmith77 Месяц назад

What's up with the grid size dwarfing the input panel/rules pop-up on the last few videos? Rules are almost impossible to read on my mobile screen.

@themuffin437 Месяц назад

4:59, nice, quick puzzle that made me think

@penningmeestercgkdelft9159 Месяц назад

Solved it in 7:28. :-) What a wonderful idea for a puzzle once again!

@ouUnIXM1ASRQvM8u Месяц назад

23:34 love the idea

@LithmusEarth Месяц назад

[ 3, 5, 7, 11, 13, 17, 19] Once he said between 3 and 19, I just looked it up the first ten primes, and picked the subset between and saw if we'd have to cut any, there are exactly seven and they add up to 75, well i know what this puzzle is going to do 11 minutes in.

@jessecox6003 Месяц назад

19:46 Fun puzzle!

@livejapan Месяц назад

10:41 Nice solve via constrictions.

@Kirbyfan87827 Месяц назад

Finished in 13:09, though I never would have discovered the break-in without n8_n's comment about 75.

@CorrectHorseBatteryStaple472 Месяц назад

I think it's surprising that this is even possible. 7 primes adding to 75 that somehow can be added up to with 1-5 5 times.

@Kaepsele337 Месяц назад

To me this the most miraculous miracle sudoku

@BinarySecond Месяц назад

Needed a little help from Simon to get going on the right hand side but I did it :)

@srwapo Месяц назад

21:08, spun my wheels for a bit at the end, breaking the sudoku. Looked at the video and saw that my logic was correct, so I re-pencil marked everything and it ended up working on my final attempt. No idea what I was doing wrong, maybe summing the cage in the upper right incorrectly?

@Rubenhuisman1234 Месяц назад

Don't try this when you're tired. You're gonna believe that 9 is a prime number and mess up the whole puzzle

@zackleonard8559 Месяц назад

3:44 for me, quick little puzzle

@Orenotter Месяц назад

Prime numbers of three five and seven, Thirteen, se'nteen, nineteen, eleven. Ach, trying to break in Twas too much to take in. For me, it were nay slice o' Heaven!