A Dash Of Sudoku Magic

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A Dash Of Sudoku Magic

Рет қаралды 44,284

2 жыл бұрын

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** TODAY'S PUZZLE **
This has been a whole week of absolutely stunning puzzles on the channel. So we needed to find a good one to keep the run going and this puzzle, Dash, by Alaric Taqi Arentza (Crusader175 on Discord) is better than good!
Do give it a try at the link below:
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Rules:
Normal sudoku rules apply. Cells separated by a king's move (in chess) cannot contain the same digit. Neighbouring digits on a green line must have a difference of at least 5. Digits on a purple line form a set of consecutive, non-repeating digits (which can be in any order).
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Пікірлер: 152

@alarictaqiarentza9451 2 жыл бұрын

Hi Simon! Thank you very much for featuring another of my puzzle and kind words! Very very happy to see this get featured. I really loved setting Renban/Whispers combo. Very amazing solve! You spot the intended break-in very quickly. After the coloring is done, my approach is a little bit different to disambiguate the digits. But it leads to the same conclusion that R3C5 is 1/9. This probably more on the high 3/5 for difficulty. I hope everyone enjoy the puzzle too! :)

@yant3303 2 жыл бұрын

Very enjoyable puzzle, thanks!

@rontyson6118 2 жыл бұрын

It was fun to solve this. You have a great mind. Brilliant puzzle. :)

@technognome2196 2 жыл бұрын

I also had a slightly diffrent break in using 4/6 logic earlier on the whispers. r1c2/r2c2 and r8c8r8c9 turn into a 45 or 56 pair wich forces r3c6 and r7c4 to be a 46 "pair" cause both 3 cell wispers can´t hold a 4 and 6 anymore. This forces r3c5 and r7c5 to be a 19 pair wich is resolved by the given 1 . Did the coloring after figuring that out.

@keskinyavuz 2 жыл бұрын

I thought the intended solution was way different. After marking 456's, just ask the question where 6 goes in row3 and because of the 1 in box2, it is forced to be in box3 row3. It can't be in box1 row3 because marked cells with 456's in box1 and box3 can only have either 4 or 6. And the rest is very straightforward. I enjoyed it very much. Great work!

@Paolo_De_Leva 2 жыл бұрын

Yes, I would say it's definitely at least 6 out of 10 for difficulty. Thank you for this great puzzle. Thanks to those who shared their alternative solving path as well.

@jordylont1879 2 жыл бұрын

Simon’s views on icing to cake ratio is very important information

@simonvh7092 2 жыл бұрын

1:1 was shocking news to be honest😮

@marcbennett9232 2 жыл бұрын

Yeah wow talk about sugar rush

@crystalgehrt8861 2 жыл бұрын

The brain basically runs on sugar, so now we know why he's so smart!

@williamnathanael412 2 жыл бұрын

1:34 for the timestamp.

@fulltimeslackerii8229 2 жыл бұрын

@@simonvh7092 isn’t that just a cupcake at that point?

@sly1024 2 жыл бұрын

Simon, if you do it in your head, it's still bifurcation, but you're wrong when thinking "people don't like it". We love it, that's why we watch these videos. :)

@kevinmartin7760 2 жыл бұрын

I find high/low colouring much easier if I use a third colour for the possbility of 5. This is especially true when you don't know yet which is high and which is low, you would still be able to colour those 4/5/6 cells in rows 3, 4, 6, and 7 to match the rest of the provisional colouring.

@emilywilliams3237 2 жыл бұрын

This was one of the most interesting videos recently, I think. I had a go at the puzzle for 5 minutes, just to acquaint myself with the possible early going. Since I did not get far, I started watching the video. Just so impressive. I am so admiring of your ability to see things, to follow implications, to explain things so clearly, Simon. A very nice video demonstrating a lot of interesting logic, and resulting in a lovely solve. Thank you so much for this. (And for everything on this channel ... such a pleasure.)

@clausewitzianwar 2 жыл бұрын

40:54 I love how Simon is so reluctant to do Sudoku in these puzzles that he skips over the simplest Sudoku logic

@inspiringsand123 2 жыл бұрын

Rules: 03:31 Let's Get Cracking: 04:54 Simon's time: 38m42s Puzzle Solved: 43:36 What about this video's Top Tier Simarkisms?! The Secret: 1x (15:20) And how about this video's Simarkisms?! Ah: 9x (06:43, 10:39, 10:41, 24:10, 25:30, 35:21, 36:57, 41:12, 41:23) Symmetry: 8x (07:47, 07:50, 08:00, 08:22, 08:32, 08:35, 32:11, 33:11) Bother: 5x (23:11, 35:45, 36:00, 37:22, 41:29) The Answer is: 5x (11:36, 15:55, 19:42, 27:32, 27:54) Lovely: 5x (06:46, 06:46, 13:25, 13:28, 18:31) Beautiful: 5x (06:44, 27:02, 27:05, 43:53, 44:12) Deadly Pattern: 5x (30:17, 30:31, 30:54, 31:21, 42:13) Obviously: 4x (04:18, 08:13, 18:46, 19:25) Nature: 4x (14:13, 15:26, 15:41, 25:11) Sorry: 3x (14:57, 21:42, 35:55) By Sudoku: 3x (26:36, 40:11, 42:33) Wow: 3x (29:05, 29:05, 29:05) What Does This Mean?: 3x (04:07, 06:30, 14:26) Cake!: 3x (01:26, 01:28, 01:35) Hang On: 2x (09:27, 21:10) Fabulous: 2x (43:37, 43:37) That's Huge: 2x (10:41, 10:41) Pencil Mark/mark: 2x (09:01, 35:08) Good Grief: 1x (43:27) Clever: 1x (02:09) Brilliant: 1x (02:02) On the Cusp: 1x (43:44) Most popular number(>9), digit and colour this video: Ten (2 mentions) Six (86 mentions) Orange (14 mentions) Antithesis Battles: Low (18) - High (11) Even (2) - Odd (1) Higher (2) - Lower (2) Row (19) - Column (10) FAQ: Q1: You missed something! A1: That could very well be the case! Human speech can be hard to understand for computers like me! Point out the ones that I missed and maybe I'll learn! Q2: Can you do this for another channel? A2: I've been thinking about that and wrote some code to make that possible. Let me know which channel you think would be a good fit!

@simonvh7092 2 жыл бұрын

I'm glad to learn you're a computer and not a counting human. Though your designer probably has as much time on their hands to create this awesome bot, the two scenarios (bot / human counting all this stuff) differ in many positive ways apart from that :) Great work designer! (And bot)

@simonvh7092 2 жыл бұрын

A graph with time for X on all of these statistics would be incredibly interesting, especially for "obviously" for example, for reading character development. Make time increments a week, so the "obviously" doesn't spike at certain puzzles, moods, or other things that differ from day to day.

@vigilancebrandon3888 2 жыл бұрын

Incredible, thank you

@IvoHristov1 2 жыл бұрын

You have detected "let's get dashing" which is intriguing.

@VecheslavNovikov 2 жыл бұрын

I'm amazed how clean these solves are. Took me two hours of marking all over the board to somehow arrive at the back door of the solution. Somehow the break-in is usually one of the last things I figure out.

@chipsounder4633 2 жыл бұрын

Completely understand that people would call it bifurcation but i would agree with simon especially with the way the logic was symmetrical. After that the polarity and kings move worked like the cake and icing ratio 😂😂

@piarittersporn 2 жыл бұрын

The beginning was quite difficult and I had to try a few things. After r3 and r4 were defined, r6 and r7 were faster. It still kept me busy for about two hours, but I really enjoyed it. A great puzzle.

@gdshoe5822 2 жыл бұрын

Wonderful puzzle. Loved the solve. I don't know what all the hate is about for placeholder digits. I don't think I could have done this puzzle otherwise. It's not bifrication any more than using colors is. It's just a matter of notation, not guessing.

@emilywilliams3237 2 жыл бұрын

Yes, I like this analogy with the use of colors. I agree with you 100%! I think that bifurcation is something quite different, mostly having to do with making a guess out of laziness, or in a competition and having to do something to avoid using too much time at the end (particularly) of a puzzle.

@Swisswavey 2 жыл бұрын

Bang on 39 minutes for me but I had a long blind spot halfway through. Fun puzzle, beautifully constructed.

@markp7262 2 жыл бұрын

31:38 finish. Love how the line logic worked on this one! I rushed at the end, and mislabeled a cell which quickly broke, and it made me question everything for a minute. Fortunately, I stepped back and saw that I just made an incorrect assumption, worked it from the other end of the column I was on, and finished strong. Fun fun fun!

@crystalgehrt8861 2 жыл бұрын

Brilliant and beautiful logic.

@adagraves 2 жыл бұрын

My breakthrough moment was a minute or two before Simon's, when I realized the 1 saw four blue cells because of the whispers line next to it. Whichever way it's polarity goes, it adds a blue and orange to the count of cells 1 sees, and 1 already saw three blues.

@Gonzalo_Garcia_ 2 жыл бұрын

18:57 for me. What a great puzzle! The break-in was very interesting, I enjoyed this one a lot.

@JohnRandomness105 2 жыл бұрын

6:00 Never? Remember Mark's puzzle yesterday? "High Five!"

@penningmeestercgkdelft9159 2 жыл бұрын

1:52 Did I hear correctly that Simon in his busy CtC life even has free time left for a golf competition? That is really impressive... Anyway, normal golf rules apply, hopefully, and let the "bobbins" exclamations loudly resound all over the golf fields... :-)

@JalebJay 2 жыл бұрын

32:33 very nice, logic for break in fit symmetrically

@tyrgannusgaming6657 2 жыл бұрын

Gorgeous mix of symmetry and antisymmetry

@andrewpalmer5189 2 жыл бұрын

That took 2 hours for me. But it was time well spent as I thoroughly enjoyed the solve.

@tiarkrezar 2 жыл бұрын

Hah same. I'd spent over an hour filling half the grid with letters and colors before I noticed a proper break-in. There's so many interesting constraints playing off of each other.

@Coyotek4 2 жыл бұрын

35:15 ... another beautiful (and symmetric) sudoku! Nice puzzle!

@iabervon 2 жыл бұрын

One option for doing this sort of symmetric logic without bifurcation, now that you've got letters available, would be to say that the digits are ABCD5EFGH either going up or down (which you don't yet know), and C is the blue one. Then you can do the logic from there until you prove that r3c5 is A.

@CauchyIntegralFormula 2 жыл бұрын

40'04". I'm used to these "nearly symmetric" puzzles being very unsymmetric to solve, so I was a little surprised that in the first half I often got to just parrot the logic from the top half onto the bottom half with the numbers switched. Luckily the mismatched diagonal lines eventually broke the symmetry

@beetlelamboria2297 2 жыл бұрын

The 3-4 pairs in R3C4, R3C6, R4C4, & R4C6 are interchangeable. And so are the 6-7 pairs in R6C4, R6C6, R7C4, & R7C6. This puzzle has 4 solutions.

@Edos512 2 жыл бұрын

29:27.... wow.... you can't even forget for a second about the king's rule....

@alarictaqiarentza9451 2 жыл бұрын

This is my first time setting king's move sudoku and I want it to be big part of this puzzle :)

@mjs7485 2 жыл бұрын

I don't use bifurcation on german whispers puzzles, but I do use the number 1 as a variable meaning "1 or 9", 2 as a variable meaning "2 or 8" and so on. You could use colors or letters but I find numbers to be most convenient.

@G.Aaron.Fisher 2 жыл бұрын

I've got nothing against typing a digit into the grid, when it helps you visualize the logic. It makes it an easier viewing experience, too. (Also, Mark does this all the time.)

@emilywilliams3237 2 жыл бұрын

I entirely agree.

@LednacekZ 2 жыл бұрын

30:22 for me. A bit of a head-scratcher, but once you get the idea behind the puzzle it is solves nice.

@jonathanharsh7434 2 жыл бұрын

18 minutes on the dot for me, including a period of about two minutes where I was staring at the Renbans wondering how on earth a unique solution would emerge before double-checking the rules and realizing that there was a king’s move constraint. Let this be a lesson folks: always remember to read the instructions, and read them carefully.

@AussieJohnny 2 жыл бұрын

Similar story here. Made very good early progress and then was stuck for a while. I had read the rules carefully...but forgot, for a while, about the king's move constraint.

@th.nd.r 2 жыл бұрын

Beautiful setting and solving yet again, wonder of a break-in with such magnificent Symmetry all around! PS you forgot the 3 in the corner again lol

@emdiar6588 2 жыл бұрын

Deciding which way round to fill in r3,4,6 and 7 is a clear case of necessary bifurcation. Even if you do do most of the work in your head, you still have to run two paths of possibility quite some way before crashing into the given 1 in box 2. What kind of savant skills would it require to just figure out the order without some kind of ''what if?" comparison. It takes even longer if you happen to run the correct scenario first, and then fail to notice the implication of the symmetry when you place the 9 in box 2 (like I did). I was so far in without problem that in the end I duplicated and tried it the opposite way round, THEN when I hit the rogue 1 the relief was great that I had in fact, been on the right track. I stand by the bifurcation though. If I'd put the 3 in place of the 7, I'd have hit the 1much sooner and gone 'great, I've proved that that must be a 7 and not a 3' without for one moment feeling like I had cheated.

@SamuraiPipotchi 2 жыл бұрын

20:32 In instances of limited possibilities like this one, making "guesses" temporarily can provide a lot of information, so I feel like it'd be reasonable in this case considering that you know the entire puzzle is balancing on the high-low polarity of two limited possibilities, so assuming one and running with it will give the answer as to which it is. It's also pretty significant to remember that every high number has an inverse low number. If you were to take a standard puzzle (one that doesn't include any maths) and switch every 9 with 1, every 8 with 2, etc. you'd still have a valid puzzle. That means you could technically just treat the 1 at the top as a 9 until the end if needed and then just reverse all of your values after.

@btestware 2 жыл бұрын

Completely agree. It's very impressive that Simon has the ability argue the general case without resorting to "let's assume this is the low digit", the fact is it comes to the same thing in the end. And it's much easier to make the assumption and reverse at the end as needed.

@YourFavouriteDraugr 2 жыл бұрын

It is fully reasonable, except that Simon's been on a tirade for ages now that it isn't reasonable, but tries to excuse himself every time he does it himself. The hypocrisy is what hurts here, not the logic itself (False to call bifurcation illogical.)

@SamuraiPipotchi 2 жыл бұрын

@@YourFavouriteDraugr By the sounds of it, he might be doing it because of criticism from other individuals. But it's a valid tactic, so sod 'em.

@jdferreira 2 жыл бұрын

Quick suggestion: "magnitude" instead of "polarity" seems more appropriate for analysing the German whispers lines

@emilywilliams3237 2 жыл бұрын

And it's easier to say ...

@ruokothyan7658 2 жыл бұрын

first time watching simon on tv (wireless connection yt). Feels like an online meeting ;)

@JohnRandomness105 2 жыл бұрын

I finished the puzzle, with a little help from the start of the video -- up to about 12:00. I figured that it might be a bit difficult to keep track that 46 everywhere in the grid at this point is always the same number. I also knew that at some point, I would have to disambiguate high vs. low. (Of course, the 1 did it.) Therefore, I decided to use letters A-I representing the matching numbers or 10-them. It's easier to talk about a 5D pair than a 546 pair (in the bottom left -- it's a 5F pair in the top right.), and you get to place letters long before you get to place digits. 19:35 "Now, I want to say, do I know what that is. An the answer is, `I don't know.'" Not knowing whether he knows what that is? Hmm... Okay, this is scary. I went to my grid and backtracked to where I placed the letters in the two places. If I recall correctly, I totally botched the play when I placed I between 5D pairs (and A between 5F pairs). Yet the play progressed until I finished the puzzle. I think that I satisfied all of the requirements. 20:40 Use letters to substitute for guessing. You can pretend that A-I represent 1-9, but they can also be reversed.

@Paolo_De_Leva 2 жыл бұрын

It's much easier to use digits as *placeholders* for {n or 10-n}. It's *not at all bifurcation,* as long as you know from the beginning that any digit _n_ does not represent itself, but either _n_ or 10 - _n_ Eventually, if you need to switch from _n_ to 10 - _n,_ 🔹that's just the same as assigning a value to a symbol (letter or colour) 🔹it does not require you to repeat all your previous logic steps This technique was also used in the past by both Mark and Simon (e.g. in kzfaq.info/get/bejne/hZqYlK9538rYoZs.html by Kurt Hugo Schneider; see also the discussion in the comments) The placeholder technique was also discussed by Simon in this video: kzfaq.info/get/bejne/od6Tea6W3qu2YKM.html A brutally difficult nightmare puzzle (I did not like it at all) requiring the placeholder technique is also *Baby Robot* by Philip Newman, which was published in page *109* of the *CTC book.*

@JohnRandomness105 2 жыл бұрын

@@Paolo_De_Leva I agree, that's a useful method as well. I remember trying one puzzle, where I decided to use numbers as placeholders. (There was one particular thermo to disambiguate among all the possibilities.) I finally gave up and continued watching the video. I was flattered to see Simon deciding to use that exact same method, ignoring the particular thermo until the very end.

@ExodaCrown 2 жыл бұрын

I loved symmetry of the puzzle, I got a little laugh around 37 minute mark when I looked at the 9s then at the 1 in box 2 and it affect on box 1 pushing the 1 into r2c1. I was too distracted to try the puzzle. I made it as far logic wise as the x wings of 5s in the beginning. Overall, it was interesting puzzle.

@RoderickEtheria 2 жыл бұрын

20:45, clearly, r3c8 is orange. R34c79 repeat two digits, and whatever polarity r4c8 is, it removes all of the options for its polarity equal to or more extreme from itself from r3c8.

@G4M1L 2 жыл бұрын

I did not really *fly* through this, but i never do. By my usual standards I almost did (which means, i did not take much more than twice the length of the video). I love highly symmetrical puzzles, and although it was a bit cumbersome to manage the high-low equivalent values first, the solve felt quite fluent (can you say this? question for native speakers,), just not so fast. One thing led to the next, and i never felt really stuck. An idea I had, after I really needed it anymore, was to use the letters available by the new letter tool as placeholders for high-low pairs, like A=19, B=28,C=37,D=46. Maybe next time....

@DaleKingProfile 2 жыл бұрын

So just like when someone coined the term I-wing when Mark fails to spot a digit is the last in the column, we need a term when Simon has a column or row down to 2 cells and doesn't spot that there is a digit looking at one of them, like the 25 pair in column 6 near the end though there was a 2 looking at one of them. I previously suggested L-wing, but perhaps it is a bent double

@CrypticCL 2 жыл бұрын

I propose we call it a "whoosh" ;-)

@SilverEchoes 2 жыл бұрын

"Stormtrooper scanning" seems to be the popular term for when Simon misses previously placed digits; perhaps "stormtrooper disambiguators" would be an apt term for the missed digits themselves.

@Legerine 2 ай бұрын

i keep shouting the 5 in C4... Simon, you really need to listen to us shouting through our screens from the future! :P

@stumbling 2 жыл бұрын

Beautiful puzzle. Makes me think of electronic capacitors.

@mrsirtoyou1974 2 жыл бұрын

On more difficult puzzles, my time to solve averages around 200% the video's length, however I managed this one in just under an hour, so substantially lower than that average. I think the symmetry helped expedite the logic, which is why it may have been marked as slightly less difficult, even though the logic on it is still somewhat challenging to discover.

@srwapo 2 жыл бұрын

Regret not solving this, but I was visiting my dad in the hospital and didn't have time. When I did attempt it, I forgot about the king's move constraint, and I may have actually done it in the time I put in!

@juliadefranco1130 2 жыл бұрын

I spent hours trying to solve this puzzle before I realized what I'd misread as a knight's move constraint is actually a king's move constraint.

@williamsvidsandstuffs 2 жыл бұрын

Thank you for the birthday shoutout it means a lot

@wanderlustwarrior 2 жыл бұрын

Gave up after an hour because I forgot the king's move. Came back after Simon mentioned it in the solution and got it in 46:37. Ah well.

@Paul-cn3ij 2 жыл бұрын

Similar situation for me. After 15 minutes I thought I was flying through it. Nearly half an hour later all I'd done was a whole lot of pencil marking and then I remembered the Kings move constraint again. I say again as it was crucial to the break in so dog knows how it went awol so quickly from my mind. Only took 7 minutes to finish off from there.

@bertbergers9171 2 жыл бұрын

Sorry Simon but at 39:09 i just allmost had to hit the screen, there's a 5 in the box. Yesterday i talked about how a few mistakes where fine to show you being human, but such blatant ignoring of regular scanning (and not even top or bottom nor right or left, but in the box!) is not what i meant by that. :P

@956675 2 жыл бұрын

I can't think of anything more relaxing than what I'm doing. Sitting in Bali having a foot massage, while Simon solves the puzzle.

@alarictaqiarentza9451 2 жыл бұрын

Funny enough, I'm Indonesian lol. Quite the coincidence.

@956675 2 жыл бұрын

@@alarictaqiarentza9451 unfortunately today is my last day here as I leave early tomorrow morning. Have absolutely loved finally being able to come back. Great puzzle too. I love the way you made the renban and whispers sing. I don't know how you guys keep coming up with this. The standard of sudoku has just gone through the roof in the last few years. Setters really are leading the way and dragging us along for a great ride. Thank you.

@alarictaqiarentza9451 2 жыл бұрын

@@956675 Thanks you! :)

@olivier2553 2 жыл бұрын

That was only a guess (but proved right), I was seeing that the 1 in box two would help to disambiguate a 46 at the end of the German whisper.

@jacobcombs1106 2 жыл бұрын

55:59, I was zooming through it at a very similar pace to Simon, but at the major break in moment I typoed an 9 in R4C3 and didn't catch it until everything was just about filled in and I ended up with a Schrodinger's cell and had to figure out what my typo was, go back fix it and try again. I should have been done in 40-45 minutes oh well less than double Simon's time is still pretty darn good for me.

@nightwishlover8913 2 жыл бұрын

Dear Simon: please put the link for us to "try it yourself" on the first line of the description box (like Mark does!). That way we don't need to scroll down all over the place to find it!

@rontyson6118 2 жыл бұрын

True, I sometimes click the first one I see. :/

@emilywilliams3237 2 жыл бұрын

Today's puzzle is very clearly marked, no matter where it appears in the list of links. (By the way, the patreon content is fantastic ... and so is the discord.)

@jwolfe01234 2 жыл бұрын

Is "POE-larity" for polarity a regionalism or a Simonism? I've always heard it pronounced puh-LAIR-ity or poh-LAIR-ity. It felt like he was commenting on the sense of humo(u)r of the author of The Raven. When Edgar Allan makes a joke, POE-larity ensues. I find accents fascinating and I know people who have adopted their own pronunciation of some words. I'm just wondering if the people on the other side of the pond (i.e. where Simon is) are experiencing what I am or if they think it's perfectly normal.

@k8giggles 2 жыл бұрын

I think it’s Simon making it clear he isn’t saying parity since he’s gotten gentle corrections that polarity and parity aren’t interchangeable.

@afanofosc 2 жыл бұрын

Great solve as usual, Simon. The screaming at the screen though commenced at 40:01

@Xiuhtec 2 жыл бұрын

Beyond my ability, stared at it an hour and couldn't find the break in, just some very vague ideas about 5s.

@brennan985 2 жыл бұрын

Simon, you would love a cake we have here in New Orleans: Doberge. The cake:icing ratio is indeed perfect! And it comes in two varieties, chocolate and lemon, and both are included in the same cake. Look it up!

@paulcrumley9756 Жыл бұрын

Got a decent start with the color coding, realizing that the lower half was opposite, but had to watch for about 18 minutes again until I was able to go it alone the rest of the way. 96-odd minutes.

@themonsterousmelon 2 жыл бұрын

You should check out the game, “letter lattice,” when you get into some of the longer word puzzles it’s super hard.

@TurquoizeGoldscraper 2 жыл бұрын

31:28 for me.

@logiciananimal 2 жыл бұрын

Hm, so matter:antimatter in a Star Trek antimatter reactor in the same ratio as SimonCake icing to cake proper. Coincidence?

@joostvanrens 2 жыл бұрын

Reverse the polarity!

@Coyotek4 2 жыл бұрын

Add a few more colors, and this could have been called "Rainbow Dash" ... yeah, I've watched far too much MLP during the height of the pandemic.

@_-_-Sipita-_-_ 2 жыл бұрын

14:50 for me. i think this is the fastest time i solved a 40 min vid sudoku.

@AndreAy1975 2 жыл бұрын

Solved it with help from the video.

@glennhunt5967 2 жыл бұрын

Simons inability to use simple sudoku when stuck always blows my mind lol

@CptRyaffio 2 жыл бұрын

I think Simon really needs to get into the habit of uncoloring the cells when they are no longer needed, I think it really hampers his scanning ;)

@anybrody 2 жыл бұрын

done

@RoderickEtheria 2 жыл бұрын

1:1 seems a terrible ratio of icing to cake. Seems that would be way too much icing, as icing is naturally more dense than cake, and the size of a cake tier vs the size of an icing tier makes up for this density. Having half cake and half icing makes the icing way too dense.

@michaelmele3954 2 жыл бұрын

30:10 I wish Simon would use uniqueness to deduce that C3R4 must be an 8.

@alarictaqiarentza9451 2 жыл бұрын

They don't normally do uniqueness. I don't think that also a valid uniqueness logic since for example R2C3 possible to be 3 and resolved the deadly 34 pattern.

@emilywilliams3237 2 жыл бұрын

Normally, I think that Simon and Mark avoid using uniqueness because it makes the assumption that the puzzle has, indeed, a unique solution. Also, one of the values (as in missional values) of CTC is to show the logic and the methods of deriving solutions, not just getting through the puzzle whichever way works. I have heard them say these things on various videos, and I appreciate that they actually *do* the puzzle all the way, not resort to possibly misleading assumptions.

@michaelmele3954 2 жыл бұрын

@@emilywilliams3237 I like it when Simon says "I already know this by uniqueness, but I won't use that"

@margaretsinclair6697 2 жыл бұрын

Simon enjoys his job tooo much!

@marcodesanti9304 2 жыл бұрын

i'm confused... the thing with he 5's at the beginning was wrong wasn't it? I scrolled through to see when Simon realised his mistake but he never did. Those 5's on both sides ended up violating the knights move constraint, don't they?

@YourFavouriteDraugr 2 жыл бұрын

There is no knight's move constraint.

@marcodesanti9304 2 жыл бұрын

@@YourFavouriteDraugr Aha it says king's move, so annoying, hate it when that happens. I think I need a chess piece emoji to tell the difference.

@marcodesanti9304 2 жыл бұрын

thanks, i might not have seen that otherwise, and would have just assumed Simon had gone mad

@LiquorStoreJon 2 жыл бұрын

There are King's move, and Knight's move, restrictions. Are those the only two types that apply to Sudoku? Asking as a guy who has never played Chess Thanks!

@jRoy7 2 жыл бұрын

Those are the only "chess move" rulesets I can think of that are sometimes used in Sudoku puzzles. :)

@James_Sinclair 2 жыл бұрын

Rook's move is a popular constraint (sorry, I'll show myself out)

@no_name4796 2 жыл бұрын

There was once a puzzle on this channel with bishop restiction, but yeah that's pretty much it.

@sotek2784 2 жыл бұрын

There are some puzzles with queen's (which is also bishop's, as they're the same - rook's, of course, is already implicit) move but it can't apply to all digits or there's no solution.

@efa666 2 жыл бұрын

@@jRoy7 there's also Queen/Bishop diagonal constraints

@Hertog_von_Berkshire 2 жыл бұрын

Sticky!

@geisel 2 жыл бұрын

[EDIT: i'm wrong!!!] Simon's solution is invalid. It breaks the chess rule (aka, r7c1 and r6c3 are both "5"; same with r3c9 and r4c7), which got broken right around 7:20.

@emilywilliams3237 2 жыл бұрын

I think you are thinking of the knight's move constraint. This puzzle did not have that constraint, but has a king's move constraint, which prevents the same digit one cell diagonally.

@geisel 2 жыл бұрын

@@emilywilliams3237 OMG you're right! Now i need to get back to my own solve :) thanks for the correction!

@MrCheminee 2 жыл бұрын

:( Spend an hour on this one, and then I discovered I misunderstood 'consecutive' and they didn't need to be in order.

@sierrapenman 2 жыл бұрын

follow the logic dont guess!

@MadTamB 2 жыл бұрын

Use letters instead of numbers!

@janicepang 2 жыл бұрын

Spent over 30 min finding no possible solution and then found that it's the "king's move" instead of the "knight's move"... (and this is not the 1st time it happened xd) Am going back the start again with the correct rules 😆

@lunardancer6047 2 жыл бұрын

Great puzzle, but it was able to be solved through logic and pencil markings without the need for bifurcation, so I think you should stick to the logic in the video without resorting to bifurcation.

@emilywilliams3237 2 жыл бұрын

And he actually did not do bifurcation, he did it through logic. I think that, in most cases, neither Simon nor Mark uses bifurcation in these videos. I believe that all of us might use it in a competition where we cannot afford the time that logic might take, and it is easier to simply try one of the (presumably few, as in two) options when trying to finish a puzzle quickly.