Teach Yourself A New Sudoku Trick!

Рет қаралды 66,878

Жыл бұрын

** IF YOU HAVE EVER ENJOYED ONE OF OUR VIDEOS... **
Then give yourself 17 minutes of joy by watching this video... which features neither Mark nor Simon!
• Oh No! What Has Happen...
** TODAY'S PUZZLE **
A classic sudoku today - a rarity on the channel nowadays because of the sheer number of incredible variant sudokus we see. But this one's by jovi_al, which means it's special... is it true you Can't Teach An Old Dog...
Play the puzzle at the link below:
app.crackingthecryptic.com/su...
Rules:
Normal sudoku rules apply. ie Place the digits 1 to 9 in the grid such that each row, column and 3x3 box contains all the digits 1 through 9 once each.
** NEW PATREON SOLVE **
Simon has recorded his solve of Mr Menace's EXCEPTIONAL puzzle Masyudoku. This is so good that Simon is a tiny bit concerned that it might be enjoyed by a wider audience, despite its ruleset (which is much easier to get to grips with if the solver has a working knowledge of the Japanese logic puzzle Masyu).
You can find the puzzle here and watch Simon's solve on Patreon:
logic-masters.de/Raetselporta...
And there's also The 12 Labours Of Hercules - a fantastic sudoku hunt by Peter Veenis, Aspartagcus and Panthera - with original art by Peter! We'll be releasing the solution videos for this one soon.
/ crackingthecryptic
** NEW GAS PACK IS OUT **
The new GAS pack is out on Steam for PC here:
store.steampowered.com/app/21...
It's already out on Android and App Store. 60 original puzzles by Sam Cappleman-Lynes, Clover and Philip Newman!! Earn party hats and dinosaurs with these brand new puzzles!
We've also released a FREE app full of handmade puzzles to celebrate reaching 500k subscribers - simply download the Cracking The Cryptic app on Android, Steam or App Store and then select the 500k pack. We're streaming a playthrough of this app and you can watch all seven episodes
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▶ SUDOKU PAD - Our New App ◀
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ALSO on Amazon: Search for “SudokuPad”
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Пікірлер: 258

@jovi_al Жыл бұрын

Hi Simon! Very very thrilled to see this puzzle featured! I was not meaning to insinuate that you were an old dog, hehe! The title is due to this puzzle containing some of the oldest and most well-known tricks in all of Sudoku (those tricks being the "old dog"), but showcased in a novel and easy-to-spot way. Thank you so much as always for your kindness and joy while solving! I hope more people get excited about the beauty within classic Sudoku!

@anaphysik Жыл бұрын

In that case, perhaps a better name would've been "Can Teach a New Dog Old Tricks."

@sxmchn Жыл бұрын

Great puzzle to introduce x-wings to newcomers!

@longwaytotipperary Жыл бұрын

❤ this one!

@darreljones8645 Жыл бұрын

I thought it was because the givens in the middle, along with those in the upper-left and lower-right corners, resemble a bone.

@grahamrskelly6042 Жыл бұрын

My vote for one of the puzzles to include in the best sudoku book vol 2. really fun that.

@SourceOfBeing Жыл бұрын

A rare occasion where Simon enjoys it when a sudoku makes him do sudoku.

@gregorysantos7624 Жыл бұрын

Really proud of myself for spotting the double x-wings AND the y-wing all on my own. 2 years of watching Cracking The Cryptic has paid off!

@MedusaMrigesh Жыл бұрын

same for me haha. also this was the first classic sudoku I really enjoyed solving, usually I find them either quite boring or too hard

@jovi_al Жыл бұрын

thank you for solving!!

@guanyin19 Жыл бұрын

Well done!

@luketurner314 Жыл бұрын

Me too

@ry-guy_ Жыл бұрын

I just started actually doing the puzzles a week ago and got the x-wing but not the y-wing. I ended up with everything colored different ways and pencil marked to hell then watched the video up to the y-wing and could finish it for there. The classic ones are harder for me sometimes because I always feel like I can pencil mark my way through when you really shouldn't do it that way. Variant sudoku it is clear you should think more deeply.

@Moolers Жыл бұрын

It's nice to see a classic sudoku every now and then.

@jon_flop_boat Жыл бұрын

Shye is something special. In one of my books, there’s a distinction between academics that do spell research, and casters that leverage discovered magics to perform great feats. Pilots are not the same as engineers. Every time I watch a Shye puzzle, I get to glimpse into the mind of someone who discovers new pieces of magic. 👌🏽

@_mnejing Жыл бұрын

I felt so smart when I found the first X-wing. Then I found the second one right away, and I realized what was happening. Seeing the Y-wing form as a result, I was like "this Sudoku made me feel smart. I like that." I like that, even though I know those tricks, I still struggle to find them. It's fun to see the video unwind the same way, and to have the same reactions as Simon. The way this puzzle unfolded felt so natural and, honestly, legitimately rewarding. Thanks :)

@jovi_al Жыл бұрын

thanks for solving!! glad you had fun, that's always the ultimate goal!

@alantaylor846 Жыл бұрын

More classics like this would surely be welcome!

@Coyotek4 Жыл бұрын

When I first came to this channel a few years ago, I would have found a puzzle like this to be quite challenging. Now? Finished in under 10 minutes (9:05) with no guesswork and a lot of wings (X- and Y-). Thank you, CTC, and I look forward to getting Volume 2 next year! Nice classic!

@AlexanderDaniel Жыл бұрын

heyy same with me ! i only cheated a little bit cause i didnt recognized the 1 & 2 xwings cancelling out those 4 squares, but this is the first puzzle featured on this channel i 90% completed myself 👏🏻👏🏻 lets goooo

@tremkl Жыл бұрын

It’s not always an option with complex variants, but one thing I really appreciate in good puzzle setting is when the puzzle helps guide to the solution. The X-wings being 1 and 2 helps suggest they might be a paired idea, and I love that the 1/2 x-wings leads to a 789 bent triple.

@jon_flop_boat Жыл бұрын

I don’t know if I’ve seen a puzzle that does this, yet, but I’d *love* to see a puzzle that hammers element X, then element Y, and culminates in a discovered technique that requires knowledge of both X and Y. Like, if this puzzle had required (I swear I didn’t do this on purpose, even though I’m sure that’s difficult to believe given what I’ve said immediately before this) solving given Y-wings to get the digits for the X-wings before culminating in the (showcased) XY-wing. “Recursion is the only thing shaped like itself; everything else is shaped like recursion.”

@jovi_al Жыл бұрын

Thank you! People often say "the digits don't matter in classic" but I'm of the opinion they absolutely do! having [123] look suspicious for example makes the solver think "hey, this is probably on purpose..."

@jovi_al Жыл бұрын

@@jon_flop_boat I'd be happy to give it a try in classic!

@jon_flop_boat Жыл бұрын

@@jovi_al :D

@krblumen Жыл бұрын

One thing that I spotted right away was that the given 1 and 3 in box 2 meant a 13 pair in row 1. Same for box 8 giving a 15 pair in row 9, box 4 giving a 26 pair in column 1 and box 6 giving a 24 pair in column 9. From there the 2 x-wings were evident!

@haniapopowska8966 Жыл бұрын

I spotted that also and it was a bit sad that Simon didn't.

@johnbridger5629 Жыл бұрын

Simon pointed out this kind of pattern a couple of years ago referring (I think) to the NY Times puzzles. It's what helped me to spot it.

@scarrow Жыл бұрын

I totally failed to pick this up and resorted to much more manual labor than necessary, but I was also sad when Simon didn't immediately pick this up.

@TheAntibozo Жыл бұрын

I solved this by marking the Phistomefel corners and ring and eliminating from both. This eventually yielded the result that 1 and 2 could not appear in the ring.

@alessandrobuzzin7982 Жыл бұрын

My 1st CTC puzzle solved ever :) :) :) :) i'm feeling pretty strong right now! :D

@longwaytotipperary Жыл бұрын

Congratulations!👏🏻

@Anne_Mahoney Жыл бұрын

Welcome to the family!

@brenthooton3412 Жыл бұрын

This is maybe the best tutorial I've seen on the bent triple because of how clearly the puzzle guides you toward it... both from the interaction of the X-wings and from the symmetry.

@rotatingmind Жыл бұрын

I enjoy classic sudoku the most, and I would love it to see more of these on this channel.

@CineMiamParis Жыл бұрын

Tried this puzzle when it first came out. 50 min, and I was happy, as it was one of my first non-GAS successes. Did it again 2 months later. 17 min. This channel is doing wonders for my brain. Thank you all.

@angeleia Жыл бұрын

Loved this - I thought that Phistomophels ring would be the “new trick” especially with so many of the given digits being in the corners and it got me to the point of realising that 1s and 2s couldn’t be on the corners of the ring - but probably more elegantly (and simply) solved through X and Y wing logic! Am I the only person who when solving the puzzle before watching Simon, who tries to guess which colours he will use and get very happy when we end up picking the same ones? 😅

@brendonmurley8276 Жыл бұрын

Wow - finally got one of these without having to watch Simon at all. Thank you Xwings and Phistofomel!

@3MRU Жыл бұрын

Loved the pussle and I would love to see more classic sudokus. They are still my favourite type of sudoku when I find great ones.

@SmartHobbies Жыл бұрын

Great puzzle. I love it when they feature Classic Sudokus and hope to see more on this channel soon.

@paulakeay4317 Жыл бұрын

I appreciate the classic sudokus and enjoy trying them before you show how to do them, it’s helping me to learn how to identify and apply the logic and improve. This was a great one!

@paulakeay4317 4 ай бұрын

After a year of this hobby and having vastly improved at sudoku due to playing a lot of puzzles, this is still my very favourite sudoku. Such excellent telegraphing leads to a beautiful and fun solve path, which really showcases the impressive setting skills required to set it too.

@sxmchn Жыл бұрын

What a nice classic puzzle to introduce X-wings and how to scan for cells affected by them for newcomers. 2 years ago I didn't even know about them and today I actually spotted everything, 12:54 for me.

@tangrybird04 Жыл бұрын

At first I was thinking “no way I could probably solve this but I’ll give it a try” and turns out I solved it 😊 I was very surprised I spotted the trick myself

@mistersaurus_ Жыл бұрын

It's very nice to watch you solve regular sudokus! it feels more relaxed :)

@memyself8340 Жыл бұрын

Was this puzzle featuring just to show us commenters that Simon can actually do soduko in a soduko puzzle? Well done, and very enjoyable to watch!

@amoswittenbergsmusings Жыл бұрын

I clocked 11:46. How much we owe to CtC! In those early days I would not have spotted an X-wing if you would have hit me on the head with it. Now those 1s and 2s were just screaming. Then I watched Simon leading evensong. I can go to sleep now. I don't fear the terrors of the night after receiving CtC's blessing 🙏

@GioPanStudios Жыл бұрын

That bent triple felt like finding a $10 bill in between the couch cushions.

@leojs5673 Жыл бұрын

innovative classic sudokus are always a treat!

@user-cf2ki3mw3b Жыл бұрын

I actually used the phistomefel ring to delete the 12 center marks and spot the Y wing in the corners of the ring

@cruxofthecookie Жыл бұрын

Me too! I was so proud of myself. From the setup it seemed like that would be important (only 4 digits missing), but Simon ignored it?

@angeleia Жыл бұрын

I did too!!! Glad I am not the only one :-)

@ElliottP2009 Жыл бұрын

Had to look though a lot of the comments to see this. With how complex the puzzles we usually see on this channel are I'm surprised more people didn't catch this 😒

@MomDoc99 Жыл бұрын

I would like to see more classic Sudokus on CTC, please.

@Mitrasmit Жыл бұрын

Interesting to see how Simon didn't spot you can instantly fill in all 8 x-wing cells with pairs. Not sure it sped something up, but it was the first thing I noticed.

@mikegrandgenet8531 Жыл бұрын

Exactly, the given digits in boxes 2, 4, 6 and 8 can immediately be placed as pairs on their respective 'base line', and in return give the missing triples on the boxes.

@pinkladykay05 Жыл бұрын

This drove me crazy! I wanted him to see this magic!

@jasonsmith1950 Жыл бұрын

After a lot of pencil-marking, I noticed the triples on the edges. Which led me to the pairs. The pairs then led to the x-wing which in turn led to the y-wing.

@jovi_al Жыл бұрын

hehe, those pairs and spotting the x-wing via those was the intention!

@Anne_Mahoney Жыл бұрын

@@mikegrandgenet8531 Yes, that was the first thing I noticed (even before the 4 in box 4, in fact).

@tank2045 Жыл бұрын

Simon has taught me everything I know about solving Sudoku problems, but I'm still just a novice. While I did see the X-Wings right away, I still missed the "1-2" negative constraints in (R3C3, R3C7, R7C3, R7C7)...Meaning I never came close to solving this one...

@tompendleton4555 Жыл бұрын

8:40 So that's the new trick, the Feinman wing. And that exhausts most of my knowledge of physics...

@KinkyTurtle Жыл бұрын

That was easy! Although, Simon, I figure you'd be horrified by the method I used: I Goodliffed the ENTIRE GRID. Hey, it worked for me!

@Ardalambdion Жыл бұрын

We should have more classical sudokus revealing 'new' tricks and strategies, because I am often stuck when having to switch into my 'classical' mind in puzzles that also use other clues.

@arthurcharest9061 Жыл бұрын

Love this video, I’ve been really trying to understand Y-Wings and your explanation really helped strengthen my understanding. These “easier” puzzles are a nice change of pace. Great job by Jovi_al!

@lichterin143 Жыл бұрын

needed the starting help with the 2-X-Wing, but solved it quickly after that - fun puzzle!

@shye229 Жыл бұрын

yay a jovi puzzle!! loved this one, so beautifully crafted

@dicebar_ Жыл бұрын

Given how complicated some of the recent sudokus have been, I haven't even been trying them. I regret not trying this one, though. It looked really cool!

@quothacreations3465 Жыл бұрын

great instructional sudoku, jovi_al--made me think I'm a master at spotting x-wings and bent triples--brilliant! thanks jovi_al and Simon

@georgeaman1938 Жыл бұрын

A really nice puzzle! Thank you Simon and jovi_al.

@murphy9453 Жыл бұрын

Love Classic Sudokus! this one was especially challenging. Would like to see more like this.

@timcotton1782 Жыл бұрын

Simon, the pattern around the perimeter, accompanied by the two given digits in each of Boxes 2, 4, 6, and 8, permit a quicker entry. Using Row1 and Boxes 123 as example, the five digits missing in the Row are 12378. The given 1 & 3 push those digits outside of Box2 for a pair in R1C3/R1C7, leaving a 278 triple in Row1 of Box2. Repeating this in each perimeter Row/Col exposes the x-wings of 1s and 2s, and since there 'seems' to be nothing else to work from, a brief scan for cells with only two candidates reveals the Y-wing. As soon as the 3 is placed in R7C3, everything drops like dominoes.

@llsilvertail561 Жыл бұрын

Definitely coming back to this one.

@francoisduez601 Жыл бұрын

12:42 It has been a while since I haven't solved and enjoyed a classic so much! Thanks jovi_al 🙃

@KalikiDoom Жыл бұрын

I would like to see more classic Sudoku, and diagonal ones. I very much enjoy these.

@stephenvale2624 Жыл бұрын

Finally a puzzle where I can almost keep up with Simon's solution.

@jbarrer2196 8 ай бұрын

I thoroughly enjoy your videos. I'm relatively new to Sudoku. I found another X-wing. Go to time 16:53 in your video. Notice that in row 3, cols 2 and 8 must contain the 1. Same for row 7, cols 2 and 8 contain the 1 so you have an X-wing. Notice that in rows 2 and 8, the 2 must be in either col 3 or 7. another x-wing. it is relatively easy to finish the puzzle from there.

@zincfive Жыл бұрын

Pleased with myself that I found the break-in. I guess watching thousands of solves and solving hundreds of gas puzzles is paying off... 12 1/2 minutes for me!

@de8o Жыл бұрын

Very happy with my 15:54 time. Being able to solve anything other then a GAS video is a bonus for me.

@scotthogfoss3975 Жыл бұрын

I love seeing classic sudoku, more please!

@CalQdeX Жыл бұрын

This seems like a perfect puzzle to introduce a beginner to added logic beyond simple sodoku.

@tomsommerville Жыл бұрын

I liked that all of the 1s & 2s in boxes 1, 3, 7, and 9 were involved in X-wings :)

@varshaaruchamy9004 Жыл бұрын

What I love about Simon's video is he explained the trick very clearly for new viewers even if he explained the same in the previous videos

@penningmeestercgkdelft9159 Жыл бұрын

8:28 for me. After spotting the central Y-wing in rows/columns 3 and 7, the whole puzzle just collapsed and gave up its resistance. :-) Very satisfying!

@Anne_Mahoney Жыл бұрын

I believe the term you want is "rolled over and let you tickle its tummy"!

@wanderlustwarrior Жыл бұрын

16:21 for me, and wow, that was a very clever puzzle! I definitely could've made some improvements on my time, but I'm happy with it! This takes me back to that one puzzle where all the possibilities were given, and we had to spot all the bent triangles.

@wanderlustwarrior Жыл бұрын

Yup, tried it again and got it in 7:12 by focusing on a different starting point, but of course it's too soon after my initial solve to say I went in blind.

@th.nd.r Жыл бұрын

Oh my goodness!!! What a puzzle!!!! jovi_al as usual being the absolute beast of a setter she is!!! Wow. X-wings into a bent-triple into a digit into the x-wings being solved into the rest of it falling apart so pleasantly, what a beauty of a solve path. Well set and well solved!

@VeritasUnae Жыл бұрын

It’s lovely to see in the end that the given digit diagonals are actually pointing to the squares revealed by the X-Wings. This was a lovely solve to watch this morning! Wonderful setting jovial c:

@rogerjones8809 Жыл бұрын

I like the x wings, I was aware of them, but never really used them to solve a puzzle. I never use pencil marks which makes it take longer. Nice trick which helps crack it open!

@chrisleverne 8 ай бұрын

going through the backlog of my CTC videos, I finally tried one for myself again as this seemed "straight-forward" enough given the classic sudoku ruleset. Sadly still needed some help from watching Simon solve it but I do give myself a small pat on the back for not only spotting both the x-wings but also trying to apply the Phistomefel Ring to the puzzle as well and using the latter to try and limit some of the given digits. Made quite a mistake in box 9, though, so had to see Simon solve parts of to at least confirm for myself how much I got right and then saw my error :) Great puzzle, wonderful setting and as always an amazing solve!

@ronjohnson6916 Жыл бұрын

This showcases the true strength of the channel. Nice guys having fun. Helps that the logic is explained so well. I can't tell you how many times an explanation of an X wing or a Y wing made no impression on me. Thanks to the explanation on the channel I can not only spot them, but I understand their impact. Nice bit of constructing by jovi_al to link the two.

@alienrenders Жыл бұрын

9:36 for me. Nice little puzzle. Telegraphed x wings that cross each other, then look at where those intersections are for a nice y wing.

@MartsGarage Жыл бұрын

That was great. I can do classics as long as they are straight forward (NYT type stuff) I couldn't have done this one but did understand the principles of the X wing and bent triple. Thanks very much Simon and jovi_al for a very enjoyable classic. Mart in Solihull.

@dilbert719 Жыл бұрын

Super happy to have completed this in 14:30. Granted, I pencil marked the grid to a point that Mark would have klunked me upside the head for, let alone Simon, but watching all the various digit combinations fall away as I spied first the triples in c1 and c9, then the x wings, then the y wing, and from there the remainder of the puzzle falling into place, was rather beautiful. I was very, very afraid that this would indeed involve new tricks, which would likely stop me in my tracks, but an elegant application of tricks I already know? That's just good fun.

@tomgalli1188 Жыл бұрын

I spotted the bent triple, but didn't realize its power. I had the X-wings in place, and had pencil-marked everything, and still couldn't see how to move forward. I watched a step of the video, compared it to my work, nodded sagely, watched a little more of the video, etc. Once the magic of the bent triple was revealed, the puzzle absolutely surrendered. Lovely!

@missy1806 Жыл бұрын

Just found your channel recently so trying the easier ones with-out the lines and filling in colours atm. This was a very interesting puzzle, I had to pencil in a lot since you could do that from the numbers inside the middle outer cells to fill in all the variables in the outer grid, then pencilled the other numbers till I found the number I needed to exterminate and find the other values. Never knew about x wing and y wing tricks you showed which was interesting. It took me 14 minutes to complete but enjoyed it.

@jaredgudnason4400 Жыл бұрын

22 minutes on that one, nice solve path.. spotted the outside edge constraints right away, took a few minutes to clue into the inside 1/3 constraints, and after that just normal smooth sailing. Thanks!

@zynzane9680 Жыл бұрын

once you said "I have a feeling it has to do with these cells" (where the two Boxes intersect) I saw the triple and the cell they affected and solved the rest like knocking over dominos! I hope to someday be able to spot that on my own. X-wing is a confusing term and to myself I call that pattern a "box". Any shape of box where all four corners have the same number pinned (pencil marked). I love the classics and wish you featured a lot more classic puzzles with no additional rules. Thanks to your channel I can solve a lot of the classics now. When I say "I saw the triple" it's because I still do it the novice way by filling in all the possibilities. That way I can more easily see the patterns and that triple was obvious. Without doing that I can't solve them, but that's fine as I do it for my own enjoyment and I can't see the patterns without it the way the experts can. It takes about six minutes to mass fill all the cells and then just delete "what I see" rather than having to figure out for each cell what the possibilities are. This is after I do the sweeps and pinning and fill in any given solves there. Eventually I hope to be able to find all the patterns without filling everything in but I am sure enjoying it. Thank you Simon and Mark!

@nakymatonlapsiN Жыл бұрын

this is a really nice puzzle to see your own progress with spotting and using solving patterns

@georgewhyte7096 Жыл бұрын

19:19 Very nice classic. Well done Jovi_al made Simon sweat a bit.

@feldegast Жыл бұрын

Great puzzle, would love to see more standard soduku of this quality 😉

@tymeryder7264 Жыл бұрын

love the classics.

@Rose-ou2xj Жыл бұрын

First time I've ever attempted a puzzle on the channel. 15 minutes smack on! I'm so proud of myself

@piarittersporn Жыл бұрын

Beautiful puzzle.

@rebellucyanne Жыл бұрын

just came from doing this and succeeded. Takes me a while but i'm here to see the shortcuts and learn the names of things i might be doing

@Saykiata Жыл бұрын

Fantastic puzzle!

@azpcox Жыл бұрын

You really do need to wear your Professor Green outfit while doing the fun sudokus which teach about X wings and bent triples!

@DanielVita Жыл бұрын

Super fun classic puzzle!

@1fosters Жыл бұрын

Lovely. New York Times trick leading to pairs forming overlapping x-wings, pressured cells, a bent triple, and a satisfying collapse.

@oldguydoesstuff120 Жыл бұрын

I also enjoyed this one. Found the X wings pretty quickly, then after a bit of faffing about, found the Y-wing after fixing a pencil mark. I did notice one other thing that I'm sure others have already mentioned. In addition to the 1 and 2, there was another digit in each of boxes 2468 that had to join the 1 or 2. That gives a pair in rows 1 9 and columns 1 9. I spotted these pairs before noticing the X wing. Just another nice touch jovi_al inserted in to this fun puzzle.

@shahinulkhan7879 Жыл бұрын

Please do more “simple” sudoku’s. It really helps my learning. My software doesn’t have colours. Did not see that 3 in R7C3. Once you found me that the rest was a doddle. Thanks a lot Simon.

@Kinada Жыл бұрын

The outside of the grid was the first thing that I noticed. The way the central boxes force their given digits into pairs in the outer rows highlights the x-wings pretty well.

@1988Valley 6 ай бұрын

Hi, really enjoyed and felt good after solving it.

@carasynthiadune9842 Жыл бұрын

drinking game: take a shot every time Simon says "by Sudoku" in any of his classic sudoku videos.

@ServantOfSatania Жыл бұрын

19:45 What a neat trick, not too complex either As a sidenote and slight spoiler for people who haven't solved it, you can actually go a step further with the ones and twos after discovering the pattern and reduce them into either-or positions in the corner boxes

@Adrian_Grey Жыл бұрын

This is a really neat puzzle. I usually struggle to find X-wings and Y-wings, but this was so beautifully telegraphed, I spotted the trick pretty quickly. Solved it in just over 11 minutes.

@JohnRandomness105 Жыл бұрын

Surprise! I actually did it without any help from the video! A couple of X-wings (2 and 1), a little help from the P-ring (also 2 and 1). Corner-penciling *three* digits in a block, center-penciling a lot of pairs, and a final Y-wing on the corners of the P-ring. (That *had* to be intentional.) Yes, I would like more classics.

@blcmd Жыл бұрын

The title really threw me off. I spotted the X-wings, but then assumed there would be some complex new trick required to proceed. I figured my only hope to spot it would be to start with set theory. I setup the Phistomephel ring, which eliminated 1’s and 2’s in the ring (including the 4 key spots). Only then did I spot the Y-wing/bent triple. Alas, I could have saved some time and skipped the whole set theory portion (but it was still good to practice it). Thanks for the great puzzle!

@danielwcrompton Жыл бұрын

Loved it, did it in 28:42. I didn't spot the x-wings until I filled in the obvious pairs in r1, r9, c1 and c9

@Rach881101 Жыл бұрын

15:23 for me. Lovely classic sudoku!

@SkylersRants Жыл бұрын

The ones and twos each had a second x-wing that I found really useful.

@davidh.4944 Жыл бұрын

32:16 for me. I took my time, though, making sure there weren't any other tricks before tackling the obvious pattern with the pairs. A rather decent one, all told.

@finbarrhayes5878 Жыл бұрын

Love classic and killer sudoku.

@gr328 Жыл бұрын

There's an associate, spot that and the puzzle falls apart without the need for a deeper understanding

@Alteram Жыл бұрын

Somehow I instantly saw the pairs you could mark down in rows 1 and 9, columns 1 and 9. ie: the 13, 15, 26, 24 pairs, which let you mark the triples on each side as well.

@gregorylewis4426 Жыл бұрын

Phistomefel ring logic also works well here and can replace the x-wings.

@KestrelQ Жыл бұрын

Ahh classic sudoku, my old nemesis. Thank you for teaching us! Edit: It's kinda crazy actually, everything you showed us looks so clear when you see it, but seeing it at all is the problem. Once I saw you point out the double X wing, I could finish everything from there. I'll be taking this into every sudoku from now on! By the way, is there a possibility to add functionality to the CTC app to double click a number and it highlights all the numbers? It'd be a handy QOL feature :)

@leppyr64 Жыл бұрын

Which platform are you using the CTC app on? This feature exists on Android by long pressing on the digit.

@zincfive Жыл бұрын

@@leppyr64 Also on the web. Maybe Kestrel means on the keypad on the side, some software does this, it's handy...

@KestrelQ Жыл бұрын

@@leppyr64 I use it on Steam. There is an option to highlight matching numbers, but it's either on or off; sometimes I want it and sometimes I don't so it'd be nice to have a specific method to do it in real time :)

@leppyr64 Жыл бұрын

@@KestrelQ Oh you don't mean SudokuPad, you mean the other new app that has the 500k puzzles etc. Yeah, its either on or off. I've found the developer to be quite open to feedback when asked with other issues. I suggest you reach out to them.

@zoranocokoljic8927 Жыл бұрын

21:46. I started wtih noticing that 1 and 3 in box 2 put 13 pair in c1r3 and r1c7, and that same applies to r9, c1 and c9. I'm surprised Simon didn't notice that.

@ersatz_ben Жыл бұрын

16:41 solve! Lovely puzzle. Years of watching c2c paid off nicely!

@srwapo Жыл бұрын

16:51, found some neat tricks, kept from over pencil marking, would never have solved this, much less this quickly, before watching so much of this channel. I think I've seen these tricks before, I didn't remember them straight away, but was able to figure out the logic on my own.