Zipper Line Sudoku Magic

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** TODAY'S PUZZLE **
An elegant and beautiful sudoku today from gdc called A Bit Of A Stretch. It's rated just 2 stars (out of 5) on Logic Masters and features zipper lines (probably the best sudoku innovation since fog-of-war!)
Play the puzzle at the link below:
sudokupad.app/4swipiexba
Rules:
Normal sudoku rules apply. Digits an equal distance from the circled centre of a lavender zipper line sum to the central digit.
Let us know if Braid is a good idea for streaming.
Simon's intro is from The Boxer by Simon & Garfunkel. Congratulations Oleksandr Usyk.
** 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:
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Android:
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ALSO on Amazon: Search for “SudokuPad”
▶ Contents Of This Video ◀
0:00 Intro music & puzzle intro
1:50 Patreon competition finished but...
2:28 Should we stream Braid?
3:03 Happy Birthdays
6:16 Rules
6:55 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'.)
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Опубликовано:

14 июн 2024

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Комментарии : 140

@gdc42 25 дней назад

Thanks for that feature! This puzzle is a remake of one of my very first zipper puzzles and the idea (of this and the older version) was to put more focus on geometry. Thanks to all the testers and to the people recommending it. Fantastic solve as always!

@davidrattner9 24 дня назад

Another beauty from you!! Such elegance!! Congrats on the double feature today!! 🙂

@puritan7473 24 дня назад

A wonderful puzzle, thank you gdc!!

@Paolo_De_Leva 24 дня назад

An elegant logic dance. A "zipper dance." 👏👏👏👏👏 (Long ago, Qodec created an iconic *Renban dance,* now included in volume 2 of CTC Greatest Hits). By the way, Simon missed some steps of this *Viennese waltz* and jumped ahead... For instance, @9:21 he missed that *8* must be in the central columns of both box *4* and *5,* which in turn locks *7, 8* and *9* into the central column of *box 4...* _"This is not quite working is it?"_ (Simon @9:21) Actually, if you can dance *slowly,* it is❗️

@MaryVidal-pt8bx 25 дней назад

A guitar intro, S&G, AND Simon singing! Be still my heart.

@NinjaWhaines 24 дня назад

Always love a Simon guitar intro! Thanks, Simon!

@longwaytotipperary 24 дня назад

Yes!! ❤❤❤❤

@imatrot 24 дня назад

Simon ruling 9 out of the centre circle in box 8 by going through a longish process by looking at the effects on the other zipper lines rather than using the pencil marked 9s in box 2 is such a Simon thing to do.

@FrancisFjordCupola 23 дня назад

Very much so. :)

@HunterJE 25 дней назад

33:05 I love that the "simpler way to see that" wasn't just "there aren't four different digits that are smaller than 4," which is clearly _too_ simple for unsimple Simon

@MrXantrias 24 дня назад

I rather thought of: in a box there is only one way to make 4, which is 1+3 and you can't repeat it. =)

@grimsqueaker5333 24 дня назад

CTC is my sleep aid of choice and mental health booster. The puzzles are engaging enough to stop intrusive and racing thoughts. I need to focus and concentrate to follow Simon and Marks mental gymnastics. The way you deliver the logic is kind amd sweet and predictable and safe (meant in the best way possible). People often confuse peacefulness as being boring. When your mind is constantly in chaos you appreciate peace. I catch up on what I missed the next day, especially when I need to calm down and focus my thoughts. Thank you Simon and Mark.

@stevieinselby 25 дней назад

13:30 ... the contortions that Simon goes through to avoid sullying himself by looking at the pencil marks in box 2 are quite something 😎 Lovely puzzle, once you get into the right mindset of asking where the 9s go and where the middle cells go in other boxes - and as long as you don't forget to use zipper logic to disambiguate pairs later on! - it's a nice straightforward solve, took me 13¼ minutes.

@Tepalus 25 дней назад

I always love it when Simon plays the guitar. It just calms me down after a stressful day. Thank you and Mark for all those years!❤

@mstmar 25 дней назад

a small miss scan at 16:40. "you cant put 6 on a line that adds to 6", but the total of the line is 7 not 6. We can't put 6 in r3c1 for a different reason: the opposite digit on the zipper is at least 3 (because of the 12 pair in the column), so r3c1 is at most 4

@PassionPopsicle 25 дней назад

Phew, my mind can rest now, I was fretting - I'm glad there is a valid logic deduction, even if Simon didn't spot it

@chris5619 25 дней назад

Also, even if we didn't have the 12 pair pencil-marked, r3c1 couldn't also be a 6 because cells r1c5 and r3c5 would have to be the same digit.

@angec9908 25 дней назад

One of my favorite S&G songs

@Telixion 25 дней назад

I HIGHLY suggest braid. Braid was such a brilliant game for its time. The puzzles in it are fantastic. The anniversary edition that just released has a full commentary where he goes into deep detail on the construction of the puzzles. PLEASE PLAY IT!

@angec9908 25 дней назад

I love the logic threads Simon goes thru to come up with the orange 8. I think his brain completely denies the existence of sudoku until absolutely necessary. The first thing he did was pencil mark the 9s in the same column as the orange 8-9. It is ceaselessly fascinating to me especially since I can usually follow the logic but wouldn’t know where to start it myself. but the easy stuff he skips over pops right out at me 😂 Or as he says much later after another bout of mental gymnastics, “There could have been a simpler way.”

@davidrattner9 25 дней назад

What an exceptional guitar intro Simon!!! Sweet melodies of the one and only Simon and Garfunkel!! The boxer is a classic!!

@kilimanjarocruz660 24 дня назад

Technically ``Two and only''? But, I agree with the sentiment, one of my favorite musical groups.

@mstmar 25 дней назад

im always surprised how much math simon uses on the zipper lines when much simpler math would work. e.g. at 10:00, simon finds the minimum sum of the 6 cells on the zipper to be 16 and thus concludes the total must be at least 16/3. but more simply, there are 5 digits on the line, so one digit on the line is at least 5. add in it's opposite digit (at least a 1) and you get a 6+ total. the same thing happens at 19:40. here simon concludes that the sum is at least 10, so the total is at least 10/2, but again, there's at least a 4 on the line, so the total is at least 5

@UnaturalShadows 25 дней назад

arent those the same thing

@mstmar 25 дней назад

@@UnaturalShadows they end up with the same answer (this time) but are quite different methods. simon takes the minimum sum of all the digits on the line then divides by then number of pairs on the zipper while my way just looks at the biggest number that is on the line and adding 1. so at 10:00 simon goes (1+2+3+4+5+1)/3=5.333 and so concludes the total is at least 6.my way says there's at least a 5 on the line so the total is at least 5+1=6

@UnaturalShadows 24 дня назад

@@mstmar hmm ur def right that thats an easier way to do it... i guess i think of math almost entirely focused on the result cuz im programmer brained

@nicmasterdude 24 дня назад

@@mstmar I think Simon's method is a much more pure math oriented logic, where your method is a very applied math method. It takes him a lot more time to verbalize his thoughts due to the perceived complexity of his route to the same answer, but I imagine it happens inside his mind in about the same time as your method would. Both are obviously valid. I find it fascinating how much diversity there is in the way our brains process information. Simon's method seemed obvious to me, where I had to think about your method for a moment to make it make sense!

@sarahnash7174 25 дней назад

Loved this @gdc! Many congratulations 🎉

@nk0058 24 дня назад

I always love when one of the videos starts with guitar

@jessetingle9055 24 дня назад

Simon, loved your rendition of The Boxer. Looking forward to the solve.

@10prozenthimmel 25 дней назад

Thanks for the intro! I was out at 11:30 PM walking my dog when I checked what tonight’s video is about. I just had to harmonize and sing Garfunkel’s part. ❤ Now looking forward to watching the sudoku 🙃

@kevinmartin7760 24 дня назад

At 16:49 it is indeed true that you can't put 6 on a line that adds up to 6, but that isn't relevant here because the line adds up to 7. The reason you can't put a 6 in R3C1 is because it would place a 1 in R1C5 but there already is a 1 in that column, as part of a 1/2 pair that could have been resolved a while back.

@eclectichoosier5474 25 дней назад

Wow. This song (from the intro) was going through my head all day at work.

@cgoldbac 24 дня назад

It always makes me so happy to hear Simon sing :)

@eporama 25 дней назад

Love The Boxer and especially the bass harmonica from the original ❤. Fantastic rendition Simon

@chocolateboy300 23 дня назад

I finished in 38 minutes. The break-in was very fun to find. Utilizing that zippers heads have to appear on other zippers ends was fantastic. Really fun solve and I beat the video time, which is cool. Great Puzzle!

@ronjohnson6916 25 дней назад

Fun. Makes you feel clever while gently guiding you to a manageable start.

@bridgmaneli 24 дня назад

Seriously impressive vocals and guitar, that was beautiful!!!

@chris5619 25 дней назад

This is a brilliant puzzle! Well done, gdc!

@manuj.-h.7060 25 дней назад

Really liked the Intro. Well done, simon

@andrewaaberg482 25 дней назад

Thanks for the melodies and the mysteries, Simon! Love ya, buddy.

@JeanandKenny 24 дня назад

Love the the music and the poetry readings when you do them.

@piarittersporn 24 дня назад

Brilliant puzzle. Absolutely wonderful intro with the boxer. I iove this song. ❤

@lilaroseg 25 дней назад

i loved your cover at the start, simon! the boxer is one of my favorite songs. such a treat.

@LorisLaboratory 25 дней назад

Instant smile at the intro. thank you :)

@swivvy3037 25 дней назад

I've been struggling with anxiety at nights lately and finding CTC content extremely helpful. Not sure if it's just the trustworthy constant in life that I currently need; or if its because the content is soothing but just in case anyone else is struggling, I hope you find solace in this comment and know you're not alone. I've been focusing on conversations that haven't even happened (nor maybe will) for the past 90 minutes and feel better knowing I can focus on something else and hopefully sends me sleep (in a good way!)

@myfyrmadocjones 25 дней назад

Well worth the golden buzzer

@patrickgass787 25 дней назад

Braid has some platforming elements, though the mechanics of the game make most of them somewhat trivial - if you've beaten any Mario level in your life, you will likely be fine. I've heard many good things about a new game called Lorelai and the Laser Eyes. Other good candidates in terms of popular puzzle games would be Stephen's Sausage Roll, Antichamber, FEZ and Talos Principle II (there are adjustments in the game that can be made to prevent motion sickness for the last one). In terms of games that would fit your channel and that you should still stream even with lighter or no puzzle elements, would be things like I Am Dead, Untitled Goose Game and The Stanley Parable (would be a delight to see the two of you react to this game).

@cjbailey3646 25 дней назад

Came to say about the same thing about Braid, re: platforming. I think I remember Simon mentioning Overwatch a long time ago, and while it's not the same sort of game, I think he's got the gaming chops for Braid.

@SilviuBurcea1 24 дня назад

16:48 Simon gets LUCKY because he rules out 6 out of R3C1, because he thought the zipper line adds to 6 in R4C3, but the core is actually in R4C4. Luckily, putting 6 in R3C1 would need a 1 in R1C4, which cannot be placed due to 12 pair in column 4.

@iuriikononenko9238 25 дней назад

Great approach to zipper lines to work more with geometry, than math (like most ones of this type).

@eddieharwood7788 24 дня назад

What a clever puzzle. It is one of those that appears impossible to me until I take a deep breath and start looking for the possible weaknesses. Once I broke in it all came fairly easily.

@lindasteffers8004 25 дней назад

That was beautiful! Loved that intro

@MattYDdraig 24 дня назад

25:42 Some very interesting surprises turned up by the geometry on this one. Very clever.

@Kirbyfan87827 24 дня назад

Finished in 19:54 with help from the video (I watched half, left for work, and then did the puzzle by myself once I came home).

@BennyTheC_ 25 дней назад

Tough day and that intro genuinely perked me up. Love to the channel.

@margaretsinclair6697 25 дней назад

Yay! Guitar intro!

@jdyerjdyer 19 дней назад

Very good time at 55 minutes for me. Especially since it took about 20 minutes for me to realize how to play this puzzle. I used math at first to drastically reduce the sum options, but that isn't the intended break-in, though it did help me to see the key. "Where can xyz go?" Stripe, stripe, stripe. Fun! Thanks.

@steve470 24 дня назад

22:12 for me, with a break-in that looked very different from Simon's. Mine involved zipper logic plus sudoku* on high digits gradually reducing the maximum values that could appear on various dots until one was absolutely forced. Really enjoyable puzzle! *Thus, why it looked different from Simon's solve. 😉

@brianj959 24 дня назад

I really enjoyed Braid many years ago. I’m not very dexterous at computer games, but I don’t remember the platforming being hugely punishing. And the puzzling elements original and enjoyable!

@debrabowen4276 24 дня назад

Simon, beautiful rendition of The Boxer! Thank you.

@mihaelamihalache3227 25 дней назад

Finally early! The intro is very calming!🤗🤗🤗

@ericpraline1302 24 дня назад

Very smooth, thanks.

@Loca_de_idea_fija 24 дня назад

Hi!!! Loooved the guitar intro, you have to sing more please! Greatings from Chile, big ctc fan here! 😊

@estherwestbroek 24 дня назад

Did this one without peeking in 72 mns, although, I forgot to pause puzzle for interruptions so actually shorter jippy! I did do the iteration thing, but starting on box 4 and then row 5, which was very pretty and enjoyable and had implications all through the puzzle so I am sorry you missed out on that Simon. You of course had different very solid logic of your own I could never think of and used more math where I am naughty and used sudoku (excuse my dirty language). Still for me the puzzle had a wonderful flow this way! Thank you GDC.

@veggiet2009 24 дня назад

Oh i love braid! One of my favorite puzzle experiences

@olivier2553 24 дня назад

Thanks for the intro. The boxer is about the only song I know in English.

@emilywilliams3237 25 дней назад

This really is a beautiful puzzle. I got a lot of the way through it before deciding to consult the video. I don't have time at the moment to finish my solve, but I am sure I will be able to do so - thank you, Simon. Wonderful. (And thanks for the guitar intro!)

@chrisbrogan3307 25 дней назад

Great puzzle thanks

@DanStadler 24 дня назад

Beautiful opening song today. Paul Simon was also recently on The Late Show With Stephen Colbert; wonderful performance.

@Orenotter 24 дня назад

That puzzle was really a tripper. And it did keep me on my flipper. ...s. But before it was done I had mountains of fun Saying "Simon, examine your zipper!"

@alexandrostheodorosnteris3917 25 дней назад

What a pleasure for me an intro with Great classical guitar music!!! So happy to know that you are a musician as well as i am and classical guitarist in addition the same with me😊😊😊 Love from Hellas Greece 🙂🇬🇷🇬🇧🎸🎸

@eclectichoosier5474 25 дней назад

Go back through the older videos. He often plays a guitar intro. He's too humble to brag about it, but he's actually pretty good.

@alexandrostheodorosnteris3917 24 дня назад

@@eclectichoosier5474 i know playing him guitar and in older videos😉

@HunterJE 25 дней назад

It's possible once you get a handle on box 4 to promote the 12 corner marks in r6c9 (and by extension the 78 in r1c6) to center mark status, since the 15 and 24 in box 4 prevent the 1 and 2 in box 6 from both being in row 5

@Jaze327 25 дней назад

Awesome Zippers!

@bait6652 24 дня назад

His voice has hint of leonaed cohen w the guitar. Ouzzle itself is first one havent coloured while solving in awhile

@AcidDotCom 25 дней назад

Brilliant intro

@vaguevague 24 дня назад

For a game to stream, Lorelei and the Laser Eyes came out about a week ago and I think it would be a fun game for the channel. It’s a stylish puzzle/murder mystery type of game. My only concern would be that at some points the game does some funny things with the camera and controls that could bother Simon

@psiphiorg 14 часов назад

Quite a clever puzzle. My time today was 22:31, solver number 7441.

@MichaelSeltenreich 23 дня назад

Yes, braid!!

@MsNosis 25 дней назад

I solved it! I especially liked the opening logic, placing the initial 3 and 6, and the strings of 789's.

@mollyb9352 24 дня назад

I can confirm I had a chocolate cup cake on my birthday. Thank you Simon for the birthday wish! When your brain does 100mph all day every day it's nice to have it focus on something

@BumperChip_ 24 дня назад

Happy birthday!

@estherwestbroek 24 дня назад

Happy birthday! Always nice to park that Ferrari for a bit with a CTC video I agree

@MarushiaDark316 24 дня назад

You should definitely play Braid and also a French game called Tsioque (pronounced like "chalk"). I won't spoil it, but it's incredibly cute and clever with a nice twist ending.

@Ardalambdion 25 дней назад

Listen to the music carefully and all digits place themselves.

@francoisduez601 25 дней назад

31:54 Very nice puzzle ❤ Now it's time to enjoy Simon's guitar play and solve 😊

@victorfinberg8595 24 дня назад

something i did to reduce the administrative overhead: i marked all zipper line cells with COLOUR to indicate the maximum values

@Gonzalo_Garcia_ 25 дней назад

8:49 for me. Very nice puzzle!!

@_-_-Sipita-_-_ 19 дней назад

7:28 for me. not kidding, didnt expect to finish a 40 min video this fast

@marcbennett9232 24 дня назад

braid can be a mind bender. animal well is also really good. either one of those might require some dexterity and fast thinking.

@srwapo 25 дней назад

21:48, nice fast solve. Really dug how the clues play off themselves. Got stuck on box 3 for quite a bit.

@anaayoung9142 24 дня назад

To me this one was easy. Altought I made a mistake (twice) in the line at box 9, but it was almost at the end so I needed to go back just a little! Thanks 😊

@Ryan_Britt 25 дней назад

Braid is a phenomenal game for sure. There are some spots where dexterity may be a problem, but due to the nature of the game mechanics it shouldn't be too bad!

@sanctionbuster 24 дня назад

A frantic 39:51. Just pipped you, Simon.

@PriyanshuSheth1994 25 дней назад

Around min 17, simon makes an inconsequential mistake. He says 6 can’t be on a zipper with 6 in the center, but the center was a 7. Fortunately, it didn’t matter because the 6 would have been removed because it’s pair, 1, couldn’t go on the other end as box 2 already had a 1. But a fantastic puzzle and solve nonetheless!

@titusadduxas 25 дней назад

1:03:13- Another struggle for me! Happy to have finished it though.

@PathOfShrines 24 дня назад

Cute puzzle. 18:19

@wanderlustwarrior 24 дня назад

22:59 for me. I was a lot more focused than on my other recent solves.

@praematura 25 дней назад

Completed in 23:48 (conflict checker off); I got stalled a bit near the end finishing off the bottom boxes, or would have had a slightly faster time. 😅 Loved the break-in on this one, and watching Simon's solve... I see I missed resolving things on the zipper line in box 6 (already had box 2 done), which is why I struggled at the end. _facepalms_ Regardless, wonderful puzzle from gdc!

@MrDalgate 24 дня назад

If you're taking recommendations, I'll add one. It's called "Bombe"

@Rach881101 24 дня назад

28:25 for me. Nice puzzle!

@jurjenvanderhoek316 24 дня назад

14:00 I am surprised to see how long it takes Simon to see the simple fact that r3c5 has to be a 1 now. Almost 4 minutes.

@frankjiang1857 25 дней назад

Finished in 16:28. I'm not usually good at zipper line puzzles, so I was pleasantly surprised that I got it somewhat quickly. Also, love the rendition of Boxer by Simon! Can Mark play Art to Simon's Simon? Fun puzzle!

@eclectichoosier5474 25 дней назад

Not enough hair Although.... I'd give a lot to see mark in a blonde afro.

@nicocost33 25 дней назад

44.30 for me. Cool.

@RealCadde 25 дней назад

38:42 I mean, come on Simon. If R8C7 is a 4 or a 5. And you need a total of 7 or 8 for the zipper. That means R7C8 cannot possibly be a 1. AND, you have a double X-Wing on 4's and 5's in boxes 7 and 9. Or as you like to call it, a deadly pattern. Either way, R7C5 is a 5 and R7C6 is a 4. R7C3 is a 3 by zipper logic. Therefore, R7C8 is a 2 by Sudoku. And by zipper logic, R8C7 is a 5, zipper sum is 7. 1 and 6 goes in on the zipper... Puzzle solves itself basically.

@yapayzeka3183 25 дней назад

Simon forgot to check if the solution is correct this time! 😅

@noxumbra173 25 дней назад

At the 17-minute mark, Simon says 6 instead of 7.

@thesatty 25 дней назад

63:04 Great puzzle.

@andrzejzurawski4895 23 дня назад

Usually when I got nothing, not even a pencil mark, in 15 mins or so I have a last look and proceed to the video. This time this last look made me finish puzzle in 10 mins or so. Weird stuff.

@roccov3614 24 дня назад

35:00 The way I resolved the 5/6 zipper was to realize that if it was a 5 zipper then you needed 2 ways to make 5. 2 and 3 is one but you can't use 1 and 5 because 5 is already in the center. So it had to be a 6 zipper.

@RichSmith77 24 дня назад

The two ways of making 5 would be 2+3 and 1+4. Not sure why you're trying 1+5?

@mr_trever 24 дня назад

Error @ 16:43 Sorry Simon :( At this point you ask if a 6 can go in R3C1 and answer no as a 6 can't go in a cell that adds up to 6. However this Zipper adds to 7, and so a 6 could have gone there. Luckily, the 6 couldn't go there for another reason, and that being that there is a 12 pair in column 5.