The Tardis Sudoku

[@Knickolas]

Wow what a surprise to see this on the channel so soon!! This was such a fun puzzle to set, and I’m glad to see you enjoyed solving it! Thanks a ton for the feature!! :)

[@kevinsnyder4658]

Well done sir! First puzzle in a while I’ve even thought about doing again once I’ve solved it, to look for a smoother path. Bravo!

[@BozoTheBear]

Absolutely beautiful puzzle, thanks so much!!!

[@sampathkumar-ej7xl]

A thoroughly enjoyable puzzle. These kinds of logical puzzles arent my strength but I so enjoyed this starting with the given grey 5, If you have more puzzles with the same constraints please send them to the channel. I also have to commend the way Simon solves these puzzles managing to extract so much more from the given data. It is great learning watching him.

[@falloutfan2502]

Extraordinary!

[@alcaz0r1]

I'm a bit late to the party, but this is one of my favorite puzzles on the channel. Gorgeous puzzle!

[@gregs2284]

I like how Simon spent 5 minutes explaining how to use the pen tool. And then didn't use it :)

[@chris5619]

He spent about 12 seconds. I see your point, and it's a funny quip; at the time, Simon's instinct was to use the pen tool, and then he did what makes this channel continue to be successful. Instead of just showing the example, he explained how to get to the pen tool. The way Simon and Mark constantly spend time explaining things like that to new viewers is what makes this one of (if not) the best channels on youtube.

[@compdude551]

Lol instinct probably told him between lines are typically lines. But Simon’s love for coloring the grid prevailed.

[@emilywilliams3237]

@@chris5619 Yes, exactly.

[@pedrosaraiva1411]

This was my first draw a line type of puzzle that I was able to do all on my own. It took me almost 2 hours but I am really proud of been able to do all by myself 🙂

[@garagedoor0pener]

I did this puzzle yesterday and it was fantastic. It really helped after 40 minutes realizing they were between lines and not region sum lines xD

[@Craizon]

I have wasted hours struggling with knights move sudokus just to realize it was a kings move constraint the entire time :)

[@Rubrickety]

We should form a support group. I do this so damn often! Including deciding 3/4 of the way through a puzzle that the region sum lines I've been working with the whole time have suddenly transformed into arrows.

[@DaShikuXI]

Took me a good 85 minutes, as I got completely stuck on something stupid, but I did it. Great puzzle. Very similar to those connect dots puzzles, which I used to play a ton.

[@Crumbledore]

First time I ever decided to give solving one of these sudoku a shot myself(or really solving any non standard sudoku). Took 108:34 which isn't very quick but I'm happy I managed to solve it in the end, might try some more in the future if they seem approachable

[@mkwilson1394]

I loved this one! I kept thinking "No, he can't intend for us to go..." and having these lovely a-ha moments. Thank you!

[@chris5619]

I got very confused early. I actually very quickly determined the exact grey line, with the 4s written, and the 23s pencil marked. And then thought "wait, how can I connect the blue?!?" I started to think that maybe the "lines" couldn't cross, but a line could cross through the circles. Which would maybe have worked? I actually gave up there and watched the video long enough to realize my blunder. In hindsight, it seems like it should have been obvious that the blue could/should go all around, especially since when I first started thinking about the puzzle, I started highlighting out random things and thinking to myself, man, these could go ANYwhere.

[@Coyotek4]

36:04 ... it's truly amazing how much work is done by the starting 5 in the grey circle, as well as how (relatively) straightforward the puzzle is once you figure that part out Incredible puzzle!

[@Shippochi]

I just love Simon's dry humor. Some highlights from this solve: "Our between line would be made up of digits between the value of 1 and the value of... 1! And there aren't many of those digits." "I will do a little bit of cursory Sudoku" -said with a sly smile

[@tehbertl7926]

Solved in 29:58, JUST under half an hour. I really liked how the gray line was forced, which then made the blue line go alllll the way around the puzzle. As Simon said, the 1s and 9s that forced the blue line to take a certain path was a beautiful bit of construction. I had the additional pleasure of not thinking about the green line until almost the very end: this left the 23 pairs throughout the puzzle unresolved until the very end, bookending the whole thing beautifully. Wonderful stuff.

[@francoisduez601]

29:05 for me, great puzzle! I have to admit that I spend the first 10 minutes or so thinking that the grey 5 was preventing all solutions... Of course it was the key!

[@inspiringsand123]

Rules: 04:40 Let's Get Cracking: 06:21 Simon's time: 31m43s Puzzle Solved: 38:04 What about this video's Top Tier Simarkisms?! Three In the Corner: 4x (35:59, 36:07, 37:28, 37:34) The Secret: 3x (03:07, 06:26, 06:35) And how about this video's Simarkisms?! By Sudoku: 11x (17:22, 17:42, 22:43, 22:46, 24:10, 26:31, 29:44, 31:50, 34:23, 34:52, 35:03) Beautiful: 5x (16:38, 20:53, 31:10, 38:48, 39:00) In Fact: 4x (01:07, 14:41, 20:16, 35:32) Sorry: 3x (02:18, 02:45, 25:26) Lovely: 3x (18:13, 30:06, 30:09) Gorgeous: 3x (34:55, 35:49, 38:21) Stunning: 3x (38:01, 38:01, 39:00) Ah: 3x (11:45, 17:22, 36:17) What on Earth: 2x (17:00, 18:10) Apologies: 2x (01:09, 02:15) Stuck: 2x (23:37, 24:18) Our old Friend Sudoku: 2x (33:32, 37:54) Hang On: 2x (05:34, 30:50) Whoopsie: 2x (22:36, 36:23) Wow: 2x (14:19, 22:12) Cake!: 2x (02:38, 03:52) Goodness: 1x (37:15) Nonsense: 1x (23:56) In the Spotlight: 1x (37:36) Horrible Feeling: 1x (19:45) Incredible: 1x (00:38) Take a Bow: 1x (39:01) Shouting: 1x (03:32) Obviously: 1x (06:43) Losing my Army: 1x (05:32) Nature: 1x (15:08) Pencil Mark/mark: 1x (22:36) Serendipitous: 1x (06:12) Most popular digit and colour this video: Three (55 mentions) Blue (41 mentions) Antithesis Battles: Even (3) - Odd (0) Column (15) - Row (7) 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!

[@finntaggart5970]

Could try penguinz0 Charlie has some fun mannerisms that you could try!

[@pema22]

Simon didn't understand this sudoku. it's a "between lines" and he did snakes 😉

[@HalfBakedLunatic]

Really loved the way that the digits revealed always forced the next step - the 'construction' of the solution path was exquisite!

[@GregJonson]

32:18, the middle part is tricky but once you see it, everything sort of unfolds at once. Beautiful.

[@martysears]

Fantastic puzzle - best use of Between Lines I have seen

[@penningmeestercgkdelft9159]

This almost feels like a Build your Own Miracle Sudoku! Take a bow :-) And I must say the solivng path felt rather smoothly and very surprising indeed, with all the 1's an 9's shaping the pathways.. I found the initial grey path rather quickly.

[@warren_r]

40 minutes.... or 33 minutes if you don't count the two times I spent staring blankly and not seeing the obvious. Beautiful construction..... hope Knickolas will do more puzzles in this difficulty range in the future.

[@Olivia.Duncan]

It's bigger on the inside 💙

[@longwaytotipperary]

Wonderful reply! ( Doctor Who fan )

[@Android-ge7hp]

Took me 96 minutes... this puzzle did not come easily to my brain and the last deduction took 20 minutes of staring at 6 x wings

[@piarittersporn]

Just solved. What a great puzzle. I could determine the gray line quickly, for the blue/turquoise line I needed very much longer, the others resulted from that mostly. Now I can relax and watch Simon at work.

[@WhammeWhamme]

Well, this took me a long time (56 min), I think most of which was spent trying to find the grey line. Ended up using the pen tool to X out places it definitely could not go, which meant I could finally see where it had to go. Points to the constructor for ingenuity.

[@muskularchicken]

I am 10 minutes into the video and I think that you can make the grey boxes meet by using 2-3-4 or 6-7-8 by going through different 9x9 boxes and use more than 1 of each digit.

[@maxnokhrin697]

This is probably my favourite new type of cryptic sudoku. Loved this one. I like the shorter puzzles a lot overall.

[@wanderlustwarrior]

41:06 for me. So many puzzles have had 3 in the corner lately.

[@b0kkeee]

Notice how far off simon was with the first green line he just tried ;)

[@longwaytotipperary]

Much needed and appreciated diversion today! ❤ the puzzle! ❤️ the comment by Olivia Duncan

[@AFT3RDAY5]

I absolutely love this. I could watch this all day. And this Sudoku was mindblowingly beautiful 👏🏻👏🏻👏🏻

[@PapaDrom]

Thanks Simon for the birthday wish. No worries on the timing, appreciate the shout out. You guys ROCK!

[@adrianhead6272]

Simply staggered sometimes by the non-logical thinking used... found this puzzle so straightforward. The five in r9c3 forced the path and content of its line, which in turn forced the rest. Completed in 10m38s.

[@rosiefay7283]

Nice idea. Now how about combining this puzzle's sudoku ideas with a geometric layout like that of Prutsbeest's Hidden Thermo Sudoku? kzbin.info/www/bejne/Z4awaIuXgc6Fb5I

[@mega9tales]

38:50 for me and grinning the whole time at how the 1s and 9s kept pushing the blue line around. Absolutely loved it, and the 3 in the corner was my very last digit :D

[@davidh.4944]

Solve no. 5258@77:44. That was a wild route it took. I sweated the whole way that I was making a mistake somewhere, but I shockingly got to the end without incident.

[@mtmcdougall7097]

My time was 33:33, and was the 122nd solver in this software.

[@danielepicone1480]

Oh, barely beaten Simon time with my 30m10s solve. Of course I was also streaming in my room in front of my imaginary audience and explaining every single step like he did. Very elegant solve path, felt more like a connect the shapes puzzle than an inbetween lines.

[@arturocaissut1071]

Took me slightly longer than expected, I had a couple of those "Hold on, this has been available for 15 minutes" moments, but I'm overall glad that I managed it relatively fast.

[@denkata.ot.dvanaistifilms4850]

So I finally met a person who also watches Cracking the Cryptic.... but I was devastated to find out she is skipping the announcements. Haven't spoken since

[@praematura]

27:00 for me (conflict checker off), this was a really wonderful puzzle; I stalled a bit near the end in the top area while missing a few obvious things, but did finally make it through! Very enjoyable, props to Knickolas!

[@samholden5758]

There were a few times I placed a digit with "if this isn't this the blue line route will always be ambiguous". For example at 27:34 the blue line must go through the 4 on R2C4 because that's valid and nothing in the grid will ever change that so the line will be ambiguous unless it is forced to. Thus R1C5 must be a 1 (it can't be a 9 by sudoku) in order to keep only one solution for the line route.

[@clintonevans2003]

between Scylla and Charybdis Never heard that before, had to immediately pause and look it up. Didn’t even know how to spell it.

[@quothacreations]

the kind of puzzle that really pays to stick through the opening--after figuring out the grey line, the rest just fell into place. wonderful puzzle, thanks Knickolas.

[@owenneilb]

This is one of the first puzzles I completed myself, I often try them out and don't make any progress and just give up and watch you. I did get a hint as to how to get started from the video, but once I remembered by Slitherlink skills I had a lot of luck with this one.

[@MissKapanadze]

Hm so it wasn’t obvious to me that the lines couldn’t intersect based on the rules. I interpreted overlap to mean that they couldn’t go directly over each other (as in pen tool line overlapping), because there are pencil puzzles with rule set like that (can’t overlap but can intersect), but now I see the rule set here is like the puzzle “circuits”.

[@Kinada]

That was really fun. Got it in just under 40 minutes and I took a while to convince myself that I had the grey line setup correctly and that it was forced.

[@Steev42]

I had to watch a little bit of the solve to understand the between lines ruleset (I wasn't sure if it was inclusive or not, and I couldn't figure out the grey line if it wasn't for a bit), but once I got that figured out, this was a fun little puzzle. 72 minutes, but fun.

[@bait6652]

Fun to try to race against their clock(and instrcutions). Often end up losing cuz they reach a point before u so u end up pausing the video. Great to get stuck and not realize a path can go around..saw the box8obstacle but couldnt figure out how to get around it but literally u have to go around it

[@hzl1776]

42:50 was my time! Great puzzle!!

[@TimWalton0]

The way that Simon's blue didn't match exactly the given blue made this a very hard watch for me - it was a distraction from start to finish!

[@petemagnuson7357]

What sort of rule shenanigans would be needed for all 4 3s in corners? Maybe use the digits 1-8, with a set of red cells that allow repeats?

[@Egg.gineer]

I love your ‘ah-ha!’ moments. They make me smile. These are so delightful to watch.❤

[@Rubrickety]

This was an absolutely marevelous sudoku. I can hardly recall another puzzle where the first impression of how things will work is so from the eventual truth.

[@neilramsey1368]

When I did thepuzzle on 18/5 in Australia solve counter is 2518

[@HunterJE]

13:44 Another way to avoid grey going outside the yellows is any way you do it will leaves a single cell bottleneck which would have to be used by both green and blue...

[@MikeJorge100]

This was beautiful! Really enjoyed this one :)

[@1manApocalypse_CP]

33:34 I figured out the yellow circle in box 5 had to be a 1 before Simon since it's only other possibility was a 7. If it was 7, if the line went higher than 7 the other circle would have to be a 9, which is already in the row. If it went lower than 7, then the other circle would have to be a 5, and 6 would have to be in the line, which it can't.

[@geoff544]

You can tell from 23:50 - if the 1 is not in the yellow circle, then you get a 19 pair in row 5, box 6, and then there is no path for yellow.

[@Apjooz]

At first I was like "No way is this going to solve, no way" but then I saw that it got more complex.

[@ukdavepianoman]

Really superb puzzle. The opening 5 to 1/9 was a great starter.

[@charlielee065187]

The joy I got when 5 was put in row 1. it meant only one thing. its 3 in the corner. easily pleased

[@ronald1234321]

mega nice !!!

[@Artoooooor]

Nice puzzle... but why "Tardis"?

[@aere481]

You had me at 'Tardis'

[@mauriciosarkis]

I loved it. Still learning though. It took me 133 min...

[@ssr8555]

Had to go try to solve the gray between line before watching this. Very clever

[@jacobcain9008]

With a LOT of help from the video, this took me 46 minutes.

[@guigui0246]

Today is one of the fastest time I've done without needing the video to help : 16:37

[@erickehr4475]

30:39 for me. I sometimes struggle with the more geometric ones, but after eventually working out the grey line, it went fairly smoothly.

[@Screm01]

32:24 Simon see's the 67 pair in Row 1 AND THEN clicks on the 6 in Box 2 but forgets about the 67 Pair :)

[@Zaranathax]

Hmmm... nothing it the rules saying a between line can't go through a circle of another colour. That was my solution to the grey line problem and I got in all sorts of a pickle.

[@RichSmith77]

Circles are still part of the between lines. They're on the ends of the between lines, so part of them.

[@Zaranathax]

@@RichSmith77 Sure that is one interpretation (and maybe convention?) but the rules aren't clear on this. One could as easily say that the between lines do not include the circles as they are between them.

[@RichSmith77]

@@Zaranathax Without the circles, though, you don't have "between lines". You just have lines. 🙂

[@Zaranathax]

@@RichSmith77 That doesn't necessarily make the circle a part of the line for the purposes of crossing it. It's like the poles holding up my washing line, without them there is just a bit of string on the floor, but you wouldn't say they were part of the washing line. 🙂🙂

[@RichSmith77]

@@Zaranathax 😁 If I'm asked to add a between-line clue into an empty grid, I'm drawing the circles as well as the line. To my mind, they're part of the between-line clue. Whereas, I'd agree, the poles holding up a washing line are not part of the washing line. (I wouldn't say it's simply a piece of string, either. The plastic coating and thickness probably means I'd make a fair guess I had a washing line if I was handed it in a coil 🙂.)

[@stupot6867]

Why couldn't the second grey digit be a 5?

[@heavyink123]

That was a cracking puzzle - so clever

[@Orenotter]

Once again, our family's gathered For donuts with thick icing slathered To watch Simon puzzle As coffee we guzzle And quit when a limerick I've blathered.

[@borisgrozev2289]

There were a few seconds there with a non-constructive 3 in the corner :)

[@Etterbeer]

It took me 20 mins just to see how to draw the grey line lol

[@boydegg]

40:36 ... I did it!!!! OMG!!! BUG logic :)

[@emilywilliams3237]

Very interesting puzzle. I also looked at those gray circles at the bottom and thought that it was very tricky, almost impossible. Then I decided that I would just sit back and watch, and maybe try this puzzle at some future point. But Simon, you are just so good at the spacial stuff, the lines and snakes and things like that, I always think I understand it perfectly when you explain it, and then I go to do it myself and it does not make as much sense. Thanks for the very enjoyable video, as always!

[@michaelhoffman2011]

A fun little puzzle. Took me 30 minutes. Really surprised at how much got solved after you get the first entry.

[@ericpraline1302]

Very cleverly worked out, thanks. How grey and blue were forced was unexpected and on one occasion I thought I had broken the puzzle.

[@arataya8706]

Every time Simon says "never talk to me at parties" all I can think is that I would *love* to spend time with Simon at a party. He seems like such as kind, thoughtful person who would listen well, but also have interesting nerdy things to talk about.

[@57thorns]

10 seconds past the half hour mark for me, and it was really fun realizing just what a crazy journey this was. And this without being brutally hard (or was this just something I am relatively good at compared to other hard problems?)

[@oak3001]

Wow, that was fun. 65 minutes and I enjoyed every single one! Took me far too long to work out the blue line could take that route which allowed the grey line to work. Thank you to the setter - I feel very proud of myself

[@johnbehm6402]

I don't like that the blue line is ambiguous in box 9. it could go straight up 3-4-8-5, or it could also loop in the 2 and 6.

[@tessabrisac7423]

I don’t think it could, the rules forbid any 2x2 on a line.

[@johnbehm6402]

@@tessabrisac7423 good call. I forgot that rule since it was never necessary anywhere else.

[@林老師-i5d]

50:36 for me nice puzzle

[@arandolph846]

Do you think setters now will intentionally put threes in corners because it is a thing on this channel?

[@aidarosullivan5269]

From the amount of complaining when it's not the case, it's evident that Simon wants it to be that way.

[@denkata.ot.dvanaistifilms4850]

105:43 🎉

[@lynxassist]

That was a great puzzle!

[@srwapo]

37:43, I made a dumb mistake ruling the 1 out of the circle in Box 5. And I did check my logic that the gray cells had to loop around a bit when that popped into my head, it seemed ridiculous!

[@Aliessil]

31:51 😀 Wow, that was a lot of fun, and easier than I expected at first glance. If Simon had continued to use the line tool instead of colouring, he could've used X to denote where the lines couldn't go 🙂

[@dddnegre]

Loved the puzzle, very meticulous breaks with the lines! 43 mins

[@titusadduxas]

44:53 Loved it!

[@bruceh8043]

Finish in 45:12.

[@Pritchie45]

56 minutes

[@MrCheminee]

jEEJ! 01:31:28

[@CrimWorld9]

Hello Simon.

[@KeithGrant]

I used to love this puzzle game where you had to figure out how to connect the colored dots without crossing lines. This is an incredible take on that. I love it

[@mgafMUAT]

39:51 my time! that circled 5 was THE clue that started and unfolded the puzzle for me.

[@_-_-Sipita-_-_]

25:31 for me.

[@mudscuffer]

50:33 for me

[@robertcousins2274]

20:47 for me

[@sonalita_]

Just under an hour for me, 10 mins of trying to figure out the grey line… had to do a cheeky peek at the video to see it.

[@Swisswavey]

45 minutes for me. Didn't find it easy but i enjoyed it.