The Expert's Sudoku Technique

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Today we have classic sudoku for you! Well, actually, we have two classic sudokus... This video features a really clever puzzle by Sam Cappleman-Lynes that will teach you a very cool technique if you've not seen it before.
For patrons of the channel on Patreon, we've also released a second video in which Simon solves a second puzzle by Sam - this puzzle was described by the UK's best ever sudoku solver (David McNeill) as "pure evil".... That video is longer than this one...
You can play both Sam's puzzles at the links below:
This video:
app.crackingthecryptic.com/su...
"Pure Evil" puzzle featured on Patreon:
app.crackingthecryptic.com/su...
Rules for both puzzles:
Normal sudoku rules apply!
Join us on Patreon at the following link to watch how to solve the "Pure Evil" sudoku:
/ crackingthecryptic
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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◀
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▶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.
Thank you for watching!
Simon and Mark

Опубликовано:

21 янв 2021

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Комментарии : 238

@AlonAltman 3 года назад

Simon: Solves a classing sudoku Also Simon: "by Sudoku"

@seanmcdonough2683 3 года назад

Not sure about this ruleset. Took me awhile to wrap my head around these rules.

@nadines.1107 3 года назад

Show-off. Still a bit fuzzy to me.

@lucieea7544 3 года назад

yeah it’s quite unusual

@billyoung8118 3 года назад

The large font in the rules scared me a bit.

@awilliams1701 3 года назад

surely a puzzle with this many digits can't have a unique solution. lol

@gmalivuk 3 года назад

Right? How can you solve a sudoku when you don't know what cells add to other cells? And when every chess move is allowed except rook, it seems like it would have to be way too underdetermined.

@davidrattner9 3 года назад

2:06..rules 2:07 ..let's get cracking

@mightworth3735 3 года назад

Quote of the day: "This puzzle should be in a museum!"

@byte7930 3 года назад

Classic Indy

@emmanuellaurens2132 3 года назад

Simon: Bla-bla-bla technique bla bla look up here this is beautiful this cell is restricted bla bla... Me: *rolls back sleeves* ok, I see no obvious digits, let's select all the cells in the grid, fill them with 123456789 pencil marks, and then start trimming those pencil marks down down and hope we see something appear.

@hubbcap18 3 года назад

that's what I'm doing with the "pure evil" one right now...

@MysticWanderer 3 года назад

ouch, information overload. Not that long ago I would have done too.

@MysticWanderer 3 года назад

@@hubbcap18 Pure evil breaks open if you highlight a particular number and start eliminating cells. I forget which number but one of them gives up every one of it's spots the first go round. This happens a few times if you go that rout.

@sunriselg 3 года назад

That's what I always do.

@yiotatort 3 года назад

I was so happy to spot a y-wing before Simon pointed it out. I think it was possibly my first ever.

@MinibestiaGG 3 года назад

Im amazed at the way you solved it, I have been watching the channel for 2 years now and everytime I have tried to solve one puzzle I fell short. Today was my redemption day, I started with some wonky pencil marks and felt stuck, did some trial and error and found a key to the puzzle by accident and ended up solving it in 17:51 mins. Then I came back to the video and saw your solution and I'm actually impressed yet again, thanks for all these videos, they are fantastic to watch.

@gms8994 3 года назад

I love watching Simon solve the really hard logic variations, but learning about this technique in an "easy" sudoku will give me more use in puzzles than most of the others. Thanks!

@xlittlep 3 года назад

I think you can see that this puzzle was easy, once the Y wing was used. Since Y wing was the first step needed to solve the puzzle, I'm not sure you can get a better example. Simon did a very thorough job at explaining what the Y wing was doing, since it's a very multi-step approach.

@JimOMoore 3 года назад

If you go back about 18 months there were a lot more classic puzzles on the channel. That was when I started watching and picked up a lot of useful tips.

@f.b.jeffers0n 3 года назад

I'm currently on the last 3 puzzles of your Classic app, and 2/3 of them are Sam's. What a brilliant setter...

@notnek12 3 года назад

I'm happy that Simon got to have a day off today :)

@frenchw1nter 3 года назад

I actually love these shorter videos, I specifically go looking for them! Just what the doctor ordered. Love your work on this channel!

@danielrhymer1762 3 года назад

Simon just makes it look so easy. Took me about as long to get the opening step as he did to do the entire puzzle whilst explaining the logic to everyone watching 😂

@fvizeus 3 года назад

Well... It took me almost 20 minutes to find the trick. Before that I could not place a single digit. Meanwhile Simon finds it in less than 3 minutes and solves the whole puzzle in less than 15. That's why I love this channel!

@thomasdalton1508 3 года назад

"by Sudoku" isn't the most informative explanation in a classic!

@rickroll9086 3 года назад

Means it’s obvious. By the time he’s just doing ‘by sudoku’ he’s just filling in the only number available in that square by the basic rules ‘of sudoku’. For example, if there is already 2,8 penciled in a square, when you get the 2 in a different square in the same row, then the penciled square gets the 8.

@thomasdalton1508 3 года назад

@@rickroll9086 Normally it means by the rules of Sudoku rather than the special rules of that variant. In this case, the rules of Sudoku are all we have.

@kuroganeyuuji6464 3 года назад

the way simon uses "by sudoku" means there is a digit on the row/column/square, otherwise he explains things, like x-wing, y-wing, pencil marks etc

@Healer1124 3 года назад

I know it's a shorter video, but I do really enjoy the classic sudoku, and that was a really wonderful solve. I'm not sure how long it would've taken me to get that trick at the beginning. Wonderful!

@karissajohnson7961 3 года назад

I SAW IT. I SAW THE BENT TRIPLE! Me to my 🐈

@Teconpl 3 года назад

Wow, I heard "Ben's triple" till now, Thank you :D

@rickroll9086 3 года назад

Nice; it took me forever to get to the restricted squares in the corners and by then the puzzle was a marked up mess....and I missed it. Of course, as soon as you get the 1, the puzzle unwinds ....I just couldn’t see that 1 😩.

@o2g1337 3 года назад

Finally a chance for me to solve a puzzle from this channel ^^

@Adrian_Grey 3 года назад

Me: Ohh! A classic. I know how to do this! Me, 2 mins later: I do NOT know how to do this...

@bekar_au 3 года назад

I feel your pain :)

@EmptyMind32 3 года назад

And a 14 minute video, had my confidence pretty high... Took me almost 30 minutes to get it

@no-feetmcgee5577 3 года назад

British RU-vidr finds ONE WEIRD TRICK to solve classic sudoku-- setters HATE him!! ;P

@Poldx 3 года назад

I always was into sudokus since I was a kid, but if somebody gave me this puzzle to solve like half a year ago (that's approximately when I found this lovely channel here) I would NEVER be able to solve this. Now it took me about half an hour to solve on my very own before I watched the solution. And I am so happy and pleased I solved it almost the same way as Simon did. I improved so much thanks to your videos. And although I am still not able to solve most of the puzzles posted here, I am very ambitious to learn and improve even more. This is a wonderful RU-vid channel with wonderful content! You guys do a fantastic job! Keep up the good work!

@jameswiebe8956 3 года назад

As I said yesterday with Mark's puzzle - we really do appreciate the easy ones that we can actually do before watching the video. In all honestly, this really was an enjoyable standard sudoku puzzle. Thank you Sam, and thank you Simon for showing it to us.

@Urroner 3 года назад

I decided before watching the video, I was going to give it a try. Quickly it boiled down to looking for cells with only three digits. I hate this part. It's so slooooooooow. After plunking along for 30 minutes or so, I was ready to give up and humbly bow before the master and say I wasn't good enough, but, out of the blue, I saw that y-wing and hope was renewed. It only took another half hour to finish the puzzle and the only reason I finished so quickly was I have been faithfully watching Mark and Simon everyday for the last nine months and doing at least two puzzles a day. Yeah, it took an hour, but nine months ago, I couldn't even begin. Mark and Simon, salute!

@Cream147player 3 года назад

This is the perfect puzzle to explain the Y-Wing technique to someone. Beautiful.

@Crystal_Scott 7 месяцев назад

Absolutely loved how he found that first “1”😂

@lyaenidae6798 3 года назад

Yes ! Love it the classic sudokus, especially with new techniques demonstrated so beautifully !

@kilimanjarocruz660 3 года назад

Really happy that I spotted the Y-wing. Thanks CtC, I'd never be able to solve one of those sudokus some months ago!

@RockBottomRiser21 3 года назад

Love the long, elaborate puzzles but there's something weirdly cathartic about him knocking out a simple (but ingenious) puzzle in 10 minutes

@MsNosis 3 года назад

Made it! 40 minutes, but made it! love these approachable puzzles

@RoderickEtheria 3 года назад

Crazy how just one bent triple solves this whole puzzle, which I believe is truly what Sam's so happy with this puzzle about. If you were to go with singles after that one bent triple, you can basically solve the whole puzzle. A beautiful puzzle tied up with a y.

@stephenbeck7222 3 года назад

I think you probably mean hidden single (when a particular digit only has one place to go in a region) rather than naked single (when a cell location only has one digit left as an option), though there are certainly many of the latter also.

@RoderickEtheria 3 года назад

@@stephenbeck7222 yeah, probably, but basically there are a ton of singles that get resolved by the y-wing resolving, and I'm tempted to say all of the rest of the puzzle can be solved by just those singles getting placed after the y-wing.

@thomaswilke6312 3 года назад

A classic sudoku!!! Yay!!! Nikoli makes awesome handcrafted puzzles

@terryleddra1973 3 года назад

So good to see a classic. I shall tackle this tomorrow and watch the video after.

@HunterJE 3 года назад

This was so fortuitous, these come out at half past noon here so I usually watch on my lunch break, but I had to run an errand for part of my lunch, figured I'd have to watch later then got back to a video exactly as long as I had left!

@TheEricthefruitbat 3 года назад

More classic sudoku, please!

@Aoderic 3 года назад

It's funny how we see these things differently. When I came to the point, where I had two digits in each corner, I said to myself: this one down here has a 1 while the others are 789, It's probably a 1 then, lets see what happens if I make it a 9, hmm then this would be 8 this a 7, and this a 9, oh two 9s in a column, then it is a 1.

@shikharsinha6407 3 года назад

I saw it the same way

@HappytoKillmore11 3 года назад

I saw the same thing, 9 in the bottom left rules out all options in the top right

@57thorns 3 года назад

That was what I saw as well, once I watched Simon fill in the corners. I had some of the corners done but it is so hard to figure out which part of the puzzle to focus on, I guess that is what genius and life long experience is for.

@hollywoodapm 3 года назад

Great solve! I love the explaination of the bent triple. I will look for that in my games now! Thank you.

@es522 3 года назад

Thank you for finding and posting a classic!

@tbailey223 3 года назад

Great explanation, as always. Thanks to my daily visits with CTC I’m on the doorstep of a useable understanding of Bent Triples & a few other elegant mysteries of Sudoku.

@erickehr4475 3 года назад

I solved the main puzzle in 19:05. I actually found the Y-wing relatively quickly but still struggled slightly to get through to the end. Interestingly, I raced through the “pure evil” puzzle in 9:50. I used the “slot machine”method on 1/2/3, and the puzzle fell apart from there.

@eclectichoosier5474 3 года назад

(On the "pure evil" puzzle)I just filled in candidates and found at least three swordfishes. It fell apart pretty quickly, from there.

@jovaji72 3 года назад

Fast, clean and beautiful.

@JohnRandomness105 2 года назад

I've called a couple puzzles, "poster-childs for disciplined pencil-marking". This didn't seem like one of them, at least not at first. I penciled a few digits from 1 to 9, but didn't place any digits, or even fill any cells. It would have a futile exercise returning back down to 1 and redo the penciling. So I tried a few candidate cells, hoping for two-digits. Finding one in a corner, I followed a hunch and tried all corners, getting two digits in each. It did take me a minute or two to recognize the pattern as a Y-wing or bent triple -- allowing me to place my first digit, as well as my 2nd, 3rd, and 4th. I can't say it was plain sailing afterwards, but I encountered nothing memorable other than not spotting digits seeing cells. 6:00 So far, the path followed was very familiar. "You will never see a better example than this, to teach you" what a Y-wing is. Not true. There was that teaching puzzle that featured a chain of Y-wings, and perhaps one other with half a dozen or so. 8:40 This may have been my first case in the puzzle of not noticing something. I placed the 9 in box 9 a little later -- after finding a naked 9 elsewhere -- but didn't notice the single 8 remaining, and only placed it much later. It may have made the puzzle harder for me.

@ldw_98.89 3 года назад

Not used to such a big font - size in de rule set

@jeroenrl1438 3 года назад

Yes, it's almost like capslock/shouting. I'm a bit intimidated.

@nadines.1107 3 года назад

At first glance i thought it was something else. Not the rules, as they are often enough a short story in small print lately. It looked so unfamiliar.

@julialeavister 3 года назад

I usually can’t do classic but I did this one in 21:32! I didn’t even cheat and watch the video this is the highlight of my day

@mtg823 Год назад

First time I've solved one of the classic sudokus on this channel in both under 10 minutes (09:16), and faster than Simon!

@julieannmyers8714 3 года назад

Really enjoyed this one!

@asaenco 3 года назад

Very nice and lovely to learn about the y-wing.

@georgesthibaudeau1533 Год назад

This puzzle is a delight to do without using any pencil marking. It took me sometime to get started and, being a rather slow player, it took me 25 minutes and a hal f to do it. Restrictions around box 9 allows you to figure the 7 must be in row 8, thus being restricted to r7c2, you end up seeing that row 1 becomes the Achylleus' heel of this puzzle, which can be completed easily, the rest falls into place rather easily.

@jovi_al 3 года назад

Took me an embarrassingly long time, but I did get through it! Loved the puzzle.

@squallerrleon 3 года назад

24:29. Found the four corners, knew something was up, but didn't realize it was a ___. Second puzzle, I colored/erased my way into no solution right when I thought I had a single digit placed.

@tadperry1817 3 года назад

So I see it's a classic sudoku and it's by Sam, and I think to myself, "I can do his puzzles sometimes." But they are not easy. There's always some kind of trick. But I saw the problem with putting a 9 in the lower left corner and broke through just like Simon. So that's another one under my belt and now I finally know what a bent triple is and how to use it.

@vcorkleth 3 года назад

Repeating what others have said, I really found the "evil" puzzle far easier than the first puzzle. I suppose I'm just better at spotting swordfishes than y-wings (which took me way too long to spot).

@eternalblasphemy6526 3 года назад

The "evil" one is easier and doesn't requrie any specific technique in order to be cracked.

@afrostin 3 года назад

@@eternalblasphemy6526 I don't get it. Looking there. Do you mean "Pure Evil"? In c1 r8-9 I have 234 and 3456 as possible numbers.

@eternalblasphemy6526 3 года назад

@@afrostin Thanks for pointing that out, I must've mistaken it with somethign else. The tip for the evil puzzle is actually knowing what Phistomefel theorem (specifically, placing of 1 on the rim )

@RoderickEtheria 3 года назад

@@afrostin The "Pure Evil" puzzle is simple by just running swordfish on 1, 2, and 3. Notice what the results are, when you finally overlap them in various Boxes. There's a considerable limitation on the locations of these digits in most boxes.

@RoderickEtheria 3 года назад

@@eternalblasphemy6526 I don't see any reason to use Phistomefel theorem in the "Pure Evil" puzzle. Just focus on the swordfish.

@donnyh3497 5 месяцев назад

I loved this puzzle!

@Lypsy68 3 года назад

What a beautiful puzzle. Took me surprisingly little time to figure out the trick!

@stevepinard5826 3 года назад

I was feeling proud of myself for solving this puzzle before watching the video...in 25:25. Don't pay much attention to the clock when solving, but I'd guess I was 10 minutes in by the time I spotted the Y-wing in the corners. Nearly identical solution path as Simon took, just way slower. I remain so astonished at how blazingly fast Simon and Mark spot these things. A stunning combination of brilliance and experience.

@mrdrase 3 года назад

Watching CTC for over a year finally paid off, I broke the 20 minute mark on a puzzle. I saw the corners I just didn't know it was called the y-wing. Everytime my wife hears the music and Simon's voice she knows I'm usually going to be in a rabbit hole for an hour.

@MrUaas 3 года назад

Wow, it took me 54 minutes to crack the puzzle you did in 14 minutes, of course before seeing your solution.

@lizbrooker4635 3 года назад

Lovely solve... I’m enjoying sam’s puzzles on the killer app 💖

@blobdffoo819 3 года назад

Nice classic sudoku i love them, i feel like there isn't enough of these on this channel (already solved all the classics from this channel xD) Learnt so many tips. On this one it took me 13 min, figured the Y wing quickly then a classic progression but still fun !

@FirstLast-gw5mg 3 года назад

After Simon pointed out the Y wing it was a pretty easy solve. 19m16s on my end and that includes finding most of the same pencil markings he'd found, then looking at it for a few minutes before giving in and watching to see that he found the restrictions I hadn't seen in the corners and that they created a Y wing.

@michaelhoffman2011 3 года назад

On a side note... the "pure evil" one took me 13 mins... I figured out where all the 1's, 2's and 3's could go (I forget the pattern name, but I was able to make the 3 of the same digit become 2 of the same digit in each square, but proof by assumption???). after I had those numbers all figured out the whole problem was solved very easily.. so easily infact I thought i had made a mistake lol hahah. Great puzzle and fun

@seanmcdonough2683 3 года назад

Took a gamble on that "pure evil" puzzle. Very nice if you can spot a break in.

@rahulchowdary9405 3 года назад

Already solved the puzzle before so remembered the opening trick. I think this along with the one puzzle shared on patreon are the last 2 puzzles classic sudoku pack shared by Sam on discord.

@HienNguyenHMN 3 года назад

Please don't apologise for making short videos!

@philm5872 3 года назад

Do they solve sudokus in competitions on paper? If so, it would be awesome to see how pencil markings work with pencil!

@mattBLiTZ 3 года назад

They do (hence where the name came from!) and they have at least one example of a sudoku solved on paper very early on in the channel's history. They also have quite a few other examples of non-sudoku puzzles from tournaments as well, which are stunning. You might be able to sort by oldest and flip through until you find it. The sudoku I'm remembering specifically was a strange 3d sudoku variant where you can actually fold the paper into a cube, but I think they might have had at least one other as well here.

@coyote4237 3 года назад

Thanks.

@HULKEN1UP 3 года назад

Solved the "evil" by running the "slot machine" on 123. Made for a really fun solve with a few naked and putting tripples all over the place.

@michaelkaczmarski2938 3 года назад

Nice trick, the bent triple! It was the key in solving the puzzle quickly! I wasn't aware of this trick, so I was forced the fill in 3 by 3 cells with as many triples as they would hold. This was tedious, though it did allow me to solve the puzzle in about one hour. In the future, I'll always try to apply the bent triple trick.😅

@shuichiakai6765 3 года назад

I can't believe I finished the pure evil puzzle in 37:12. Simon, you have taught me well in the swordfish technique.

@RichSmith77 3 года назад

Mark's preceding video 14:41 I think Simon saw it as a challenge to do a shorter video. He beat Mark by 7s. 😂

@Carnage7314 3 года назад

7:20 very surprised in myself that I was able to spot the trick you saw at 7:40 as I normally don't see those

@michaelhoffman2011 3 года назад

Pretty fun puzzle. took me 17 mins. Spotting the corners solved it very quickly

@shyrice 3 года назад

19:15 Didn't even watch the video before solving:D Took a while to find the corner trick but sailed after that

@TheArdanOB 3 года назад

Slot machines on lower digits can give you plenty of restrictions on that bit of pure evil. With that many starting digits in the grid, it really isn't that bad. That Tatooine sunset was much trickier.

@cyrustallman8468 3 года назад

That was insane

@alvaropallete 3 года назад

Thanks for the classic, I tried everything else but didn't looked to the candidates in the corners. In the second puzzle, it took me 39:09, it uses 3 swordfishes and then some pairs, triples and even quadruples, very nice one

@inwalters 3 года назад

I was thinking the other day about game-based sudoku variants and came up with a possible one. Checkers [I think the British call it draughts ] is played on an 8x8 grid. A piece can jump another piece diagonally. What if in a variant of the king and knight move constraint, where a number would "land" if it jumped another number diagonally cannot be the same number. Another difficulty would be the solver has to work out if the 8x8 grids corner is in the upper right or left or in the bottom left or right of the 9x9 sudoku grid. There would be a row and column outside the Checkers grid where the constraint would not apply. I couldn't create such a puzzle, but would love to see one created and solved.

@MacrosDBlack 3 года назад

Quite please with a solve in 17:50. Followed the same break in as Simon and most of the rest of the solution path, narrating in my head along the way. I think I've been watching too many of his videos :), because watching this one felt like Deja Vu.

@lauraolek6928 3 года назад

solved it in 11:33! i must've learned a thing or two from simon - it could've taken me hours before watching this channel to find a new pattern on my own

@mollberg3501 3 года назад

For the first time ever, no one commenting about yelling at Simon/Mark. Me: 3:45 PENCIL MARK 9's IN BOX 8 FORCING A 9 TO ONE OF THE CORNERS OF ROW 9!

@rostre 3 года назад

My first time finding a Y-wing on my own in a puzzle, absolutely over the moon! Did it in 22:36

@peterhackett3815 3 года назад

Solved this in the exact same way a Simon, and now know what that technique is called, Y wing!

@theorganizedgrandma2523 3 года назад

I actually managed to complete this one. Took me way longer than you, and I had to undo a lot because of a silly mistake but I did it!

@TonyNaggs 3 года назад

Both puzzles were fun, I was actually a few minutes faster on the second! (I used a couple of slot machines to completely unlock it.)

@gregorysantos7624 2 года назад

13:15 one of my quicker solves and possibly the first time I've spotted a Y-wing on my own!

@Cruzz999 3 года назад

"Oh, a classic! Something I can just solve!" ~30 mins later~ Okay, I'm done, brilliant! "...that will teach you a very cool technique if you've not seen it before." Wot? I guess I gotta watch it.

@buzzly108 3 года назад

*2:08** **_Let's get cracking!_*

@joachymschiltz5739 3 года назад

I don't see anything wrong with the way he said "cracking". He just seemed to say it with a normal tone of voice, not with a sarcastic one.

@buzzly108 3 года назад

@@joachymschiltz5739 No, I was an idiot, and missed where he said it.

@paulcrumley9756 3 года назад

@@joachymschiltz5739 I think 2:08 may be some kind of record for Simon! Mark often does that around the 2-minute "mark" but Simon rarely does.

@davidh.4944 3 года назад

A good, simple classic for once, and just a little bit challenging to find the break-in. Once I spotted the y-wing, though, the rest of it came down smoothly. My final time was almost exactly 30 minutes, but I probably would've been faster if it weren't for a couple of sloppy pencil marks.

@davidh.4944 3 года назад

The "pure evil" puzzle wasn't evil at all, just maybe a bit naughty. It only required spotting one swordfish. I did fudge up somewhere in my first run, however, _almost_ completing it in about 25 minutes, only to hit a deadly pattern at the end. My second run clocked in correctly at only 15:37.

@eternalblasphemy6526 3 года назад

Took me 3 resets to finally sort things out and wrap my head around it (last attempt took ~35 mins) It was a very pleasant solve.

@bobblebardsley 3 года назад

Took me exactly 25:00 and I'm proud to have spotted (aka fluked) the correct way to start - I suppose I *was* deliberately looking for restricted cells, so maybe it wasn't a total fluke after all.

@HenrikKleist 3 года назад

This guy has played so much other than classic sudoku that he keep saying "by sudoku" :)

@jasono8783 3 года назад

A "dirty" 14:39 for me! Still having issues with break-ins until I watch a short ways into the video. I did spot the crooked triple, but couldn't figure out how to work it!

@ethermelt4780 3 года назад

"fastest puzzle ever" doesn't mean simply or boring. That first trick alone broke the puzzle open but damned was it beautiful and damned if I didn't learn alot from it.

@caseyglick5957 3 года назад

I was enjoying Simon referring to a deduction as being "by sudoku". I suppose that's technically reasonable given the rule set.

@yichen6313 3 года назад

Classic :D

@meirkara17 3 года назад

Can anyone explain how the swordfish pattern works in the evil one? I can see something and I've read about swordfishes and seen them on this channel but I can't quite figure out how it is or if I am looking at the correct thing even.

@georgeaman1938 3 года назад

Another nice sudoku! An example of y-wing technique.

@boydegg 3 года назад

9 mins and 1 sec - after Simon showed me the bent triple!

@user-A168 3 года назад

Good

@TheBiggreenpig 3 года назад

It seems scary, but the edges cracked it for me :)

@matthewender3473 3 года назад

Snap, I made a mistake partway through and had to back up, ended up with 22:17, but better late than never. I did manage to spot the corners though, that was nice!

@sunriselg 3 года назад

I messed up the first try and had to restart at 12 minutes. The second try was 6 minutes and successful.