Simply One Of The Best Sudokus Ever

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** TODAY'S PUZZLE **
Let's start with what we know: Jay Dyer is a genius. She has done it again with a sudoku so ludicrously clever it almost defies belief. From it's brain-breaking opening to its finishing flourish, this is simply one of the most incredible puzzles of all time.
Play the puzzle at the link below:
app.crackingthecryptic.com/su...
Rules:
Normal sudoku rules apply. Nine cells (one in each row, column and 3x3 box) are “doublers”, and have a value equal to double their digit. Each digit appears in exactly one doubler. The values of cells in a cage sum to the small clue in the top left corner of the cage. Digits may not repeat in a cage (though values may repeat). In row N (for all N from 1 to 9), the values of cells in the pill (read from left to right) give the row and column number of the doubler with the digit N.
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** NEW CONTENT ON PATREON **
As well as the Phistomefel and Jay Dyer extravaganzas, Simon's solve of Magnus Josefsson's puzzle Castle Wall Yin Yang #1 is now available as a bonus video. You can play the puzzle at the link below (and the logic-masters link contains an example):
app.crackingthecryptic.com/su...
logic-masters.de/Raetselporta...
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** NEW GAS PACK IS OUT **
The new GAS pack is out on Steam for PC here:
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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 - Use Our Software For Your Puzzles ◀
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Опубликовано:

7 фев 2023

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Комментарии : 187

@jaydyer3999 Год назад

Thanks for the solve! You can blame Andrewsarchus for inspiring the idea for this one with one of their puzzles. I'm particularly glad you found and used the trick with the 9s at the end, I was very pleased when I discovered that while setting it.

@Pulsar77 Год назад

That ending was naughty :-) I think I spent 15 minutes staring at the grid before I saw it. Sublime as always!

@davidrattner9 Год назад

Just absolutely another wonderful puzzle and setting from you!!!

@izzyizzy2spd158 Год назад

I do love your puzzles. This is one of my favorites (if not my number 1 favorite) 🙂

@emilywilliams3237 Год назад

I always love a puzzle that makes Simon bamboozled! Thank you so much for this and all you do for the world of sudoku (thinking of the January Patreon Reward, for just one other example ...)

@SirJefferE Год назад

@@Pulsar77 I completely lucked in to that one. I wanted to place a 7 in box 9, so I wondered briefly if I could prove it wasn't in row 9 of that box. Glanced over at the pill and was like "Okay so a seven in box 9 row 9 breaks that pill...Hang on a second. A 9 here breaks the pill regardless of the 7. Neat."

@tezcharold Год назад

It's crazy how good the puzzle constructors have become, the puzzles in the past week or so have been mind blowing, and the level was already sky high before that.

@MCarrington01 Год назад

For two years I’ve been watching CtC with rapt admiration of Simon’s and Mark’s logical process, and happy to be able to follow along with understanding. But this puzzle broke me. Still rapt admiration watching Simon.

@cthulhutentacles4716 Год назад

I feel very stupid after watching this

@harrymcculla7703 Год назад

Not just me then, Mark. 😂

@BenRHarsh Год назад

My jaw literally just dropped when I thought through how to place the first digit, or more specifically the deduction that resolves the first digit. It's just magical. I'm actually glad Simon takes his time to explain the logic in detail because it gives me a chance to get a step or two ahead when I can usually understand the logic as he talks about it. I still usually fall flat soon after that and have to wait for him to catch up (or correct my next logical flaw) so I rarely attempt to solve these in my limited time.

@ketijasturite Год назад

Hi Simon, It's Ketija, thank you very much for the birthday shout out! Made my day! I turned 24 and you pronounced my name perfectly, well done! Thank you again!

@longwaytotipperary Год назад

Happy birthday!

@ketijasturite Год назад

@@longwaytotipperary thank you!!

@lmshesser Год назад

I can just make it through the GAS puzzles at this point, but I was pretty proud that the first thing I considered about this puzzle took Simon 33 minutes to come up with... interestingly about row 3, column 3. Wild admiration, I know I couldn't tackle the whole puzzle, but happy to have had one sensible thought, hah!

@mceajc Год назад

I tremble in fear about how difficult and amazingly tricky the puzzles of the future will be! Well done on the solve, Simon, and congratulations on the puzzle, Jay.

@trisha2584 Год назад

Well done Simon. I quickly saw that the start needed 1,2,4 or 2,4,8 but couldn't work out which. I have also caught myself saying "come on Simon" a few times, mainly at exactly the same moments that you are saying to yourself.

@BarryKort Год назад

That break-in was utterly brutal.

@inspiringsand123 Год назад

Rules: 04:22 Let's Get Cracking: 07:28 Simon's time: 1h2m14s Puzzle Solved: 1:09:42 What about this video's Top Tier Simarkisms?! Bobbins: 4x (32:57, 32:59, 49:53, 1:03:36) Knowledge Bomb: 1x (1:00:25) Three In the Corner: 1x (1:09:15) Maverick: 1x (30:52) And how about this video's Simarkisms?! By Sudoku: 25x (14:01, 21:58, 27:59, 39:10, 43:04, 46:38, 50:02, 53:06, 55:32, 55:41, 56:08, 57:04, 57:42, 57:57, 58:02, 58:45, 1:02:25, 1:03:33, 1:06:11, 1:07:08, 1:08:36, 1:08:52, 1:09:02, 1:09:06) Ah: 14x (09:12, 12:05, 19:46, 29:29, 37:38, 40:01, 43:40, 44:12, 49:53, 53:28, 56:42, 58:59, 1:02:52, 1:06:50) Obviously: 12x (01:46, 04:47, 05:30, 09:34, 11:13, 12:19, 13:58, 27:40, 29:20, 30:31, 33:11, 40:41) In Fact: 10x (08:29, 09:04, 21:09, 23:13, 25:51, 32:55, 35:27, 47:51, 49:57, 52:44) Hang On: 9x (29:45, 46:24, 46:32, 46:32, 46:32, 46:32, 51:51, 51:54, 56:04) Clever: 5x (43:44, 44:12, 44:15, 47:01, 52:05) Lovely: 3x (48:36, 48:41, 56:56) Brilliant: 3x (02:40, 02:41, 03:26) Break the Puzzle: 3x (15:12, 19:46) What Does This Mean?: 3x (21:04, 40:21, 46:01) Pencil Mark/mark: 3x (40:44, 48:13, 1:08:58) What on Earth: 2x (05:03, 07:44) Goodness: 2x (1:03:42, 1:04:35) Sorry: 2x (23:40, 1:01:17) The Answer is: 2x (11:57, 17:23) Nonsense: 2x (31:58, 1:07:23) Beautiful: 2x (52:26, 1:11:00) Ridiculous: 2x (1:07:58, 1:08:01) Gorgeous: 2x (43:40, 1:10:33) Come on Simon: 2x (56:04, 58:41) Shouting: 2x (02:38, 1:01:17) I've Got It!: 2x (23:22, 23:37) Thingy Thing: 2x (26:12, 26:14) Cake!: 2x (03:11, 03:28) Bother: 1x (57:13) Naked Single: 1x (1:05:01) I Have no Clue: 1x (10:30) Stuck: 1x (59:25) Going Mad: 1x (38:13) Hypothecate: 1x (25:01) Our old Friend Sudoku: 1x (1:00:46) Bonkers: 1x (07:22) Surely: 1x (1:03:42) Proof: 1x (18:50) Baffling: 1x (1:09:53) Unique: 1x (44:37) Most popular number(>9), digit and colour this video: Twenty (7 mentions) Three (145 mentions) Purple (22 mentions) Antithesis Battles: Even (7) - Odd (1) Column (88) - Row (73) 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!

@highpath4776 Год назад

"Get With The Program" is a new one ( this is like playing marketing meeting bingo !) 34.5x

@EchoMirage72 Год назад

No Phistomefel :(

@d3adxb0yxwalk1ng Год назад

FOUR BOBBINS?? we got a good one today don't we

@john_reese Год назад

Trying to solve the sudoku with just reading the rules, I totally missed the fact that pills addressed the "value" of the cell rather than the "digit" and it made it quite obviously unsolvable. Maybe it would be worth it to put specific rule keywords like that in bold or all caps?

@radscorpion8 Год назад

Your devotion to this stream is really incredible!

@RichSmith77 Год назад

One of those puzzles where you feel you must have finally done enough to reach "the easy finish" part about five times over, only to get stuck again. Brilliant.

@benjamenmichael5454 Год назад

After a few hard hours… I now understand the rules

@MaierFlorian Год назад

Today I had at least 4 times the urge to hit like and than seeing I already did so, marvellous puzzle :D

@Bazzo4492 Год назад

My favourite channel! Keep up the great content guys. 😁

@aimeefrost3903 Год назад

Usually whilst watching these videos I’m very good at forgetting the more novel rules. This puzzle made me forget the rules of sudoku itself whilst watching - I was so wrapped up in everything else going on! 😂

@harriethogarth372 Год назад

You have joined Simon's world

@Pulsar77 Год назад

Just wonderful. It took me a moment to figure out how it worked, but once I understood the logic it flowed really well. Jay is quickly becoming my favourite constructor, alongside Phistomefel.

@rontyson7941 Год назад

Jay's puzzles always scare me. She's a genius. Luckily, I was able to solve this one. :)

@danielepicone1480 Год назад

I am one of those people that may have used ctc videos to accompany my sleep, but this puzzle was so addicting i could not stop watching until the end.

@codevii9063 Год назад

Just drove 5 hours and got home with a wicked headache. Watching this video definitely did not help my headache, but was totally worth it. Thank you for being you. Love you Simon

@AngelWedge Год назад

This one surprised me by getting a first digit inside two minutes; then ran into a wall at about 5 minutes. So eager to watch it and see what I'm missing :)

@AngelWedge Год назад

42:17 … Simon reaches the point where I got stuck.

@MrMW2nd Год назад

Back to back phistomefel and Jay dyer is so awesome

@th.nd.r Год назад

Seriously wonderful puzzle, so hard for my mind to keep track of! Incredibly set and incredibly solved. I can’t think of the last puzzle who’s favorite step of mine was so near the end, that empty rectangle is absurdly cool!!

@chrissolnordal9421 Год назад

Just shy of an hour for me - very pleased and surprised! And yes, the 9s at the end - lovely :) Thanks to CtC and to Jay.

@PhilipStCroix Год назад

I love Simon, but would absolutely enjoy watching Mark solve this one because he wouldn't get so hung up on double proving all his logic :) great solve haha

@MCarrington01 Год назад

True. Simon toyed with hints of bifurcation in order to keep his sanity on this one. The setters are getting too good. 🤗

Год назад

Following the video at about the one hour mark, I saw how the 5'th box/block should be. It would have taken me a week to reach that point. But after that it was quite straightforward. Fantastic puzzle.

@piarittersporn Год назад

What a mind bending but brilliant puzzle. At the beginning I needed some inspirations/hints from Simon, but then I could do it on my own. It took me quite a long time, but it was really very exciting.

@Ulija100 Год назад

Just amazing, total masterpiece. Just about scrabbled through it on my own, but needed to write down my logic at the start to see it. Then watched key bits of video and solved again more cleanly. Mark of the best puzzles that they remain interesting even when solved.

@Adrian_Grey Год назад

Solved this in just over 2 hours and I've never been prouder to get through a puzzle on my own. This nearly fried my brain. It was MADDENING but beautiful. I feel like I need a nap now.

@grugparty Год назад

Simon said "go ham". Love it.

@giladooshlon Год назад

This rule set confused me a lot, but I got through it eventually. Awesome setting.

@Gonzalo_Garcia_ Год назад

33:01 for me. What an incredible puzzle!! That break-in is sublime, I absolutely loved this one!!

@skr6477 Год назад

wow, that was stunning. thrilling to watch till end. also some massive deductions from simon. another great work by constucter and solver as well ✌

@tahurrrrr1801 Год назад

took me 2 days but I solved it!!! And didn't even break out the killer sudoku calculator :D It was tough because I always had half an idea of what to do, but would couple it with a piece of faulty logic that made me have to start over. I'm glad the thumbnail compelled me to give this puzzle a shot. Thanks for posting :)

@arthurcharest9061 Год назад

Lovely solve of a great puzzle!

@TheClawNinja Год назад

This thing is a work of art. Great video!

@chitraagarwal8259 Год назад

One hour to get to the break in... And then felt mightily pleased with myself and decided to just watch simon for the rest... I'll be happy with the small wins!??

@jrmouton5523 Год назад

Fabulous puzzle - Medium at start...then very hard- then hard to finish Fabulous!!! Did not need help from Simon 😀😀😀

@NorkasLP Год назад

51:32 for me. This was brilliant. Amazing how these setters keep doing what they are doing. This was beautiful beginning to end.

@MrXantrias Год назад

I can say with certainty that I am too stupid for this puzzle. With almost all puzzles on this channel I can follow along, but here I arrived at the point where my brain is just sitting in the corner rocking back and forth trying to regain some confidence.

@gamerbb2 Год назад

1:33:47 for me. Very proud of how fast I got the break in and the nearly all of the doublers and indexing cells. Over half of my time was spent pencilmarking the rest of the grid and taking a long time to see the amazing logic of how to sort out the last 2 doublers.

@Kinada Год назад

83 minutes, though I checked out the puzzle then went to make food and had time to think about it. Came back with about 5 digits ready to place, bit of a head start there. Great puzzle.

@gregr28 Год назад

Phew, took me 127 minutes, but I got it. Wow, that one was rough. But amazing. The break in is so mind bending trying to keep multiple concepts in mind simultaneously.

@Raven-Creations Год назад

My break in was the same, but I got to the 124/248 bit quicker. I think my programmer's brain probably helped me with the indexing. You caught up by spotting a couple of things I'd missed, which caused me to get a bit bogged down in the middle, although I did spot the naked single much earlier. I also spotted the 79 logic, which introduced the end game, and was very nicely worked. I had a good laugh when you pencil marked 1s in the whole of C8. Just thinking about it makes me chuckle. I wonder what Pencil Mark would make of it. The whole idea that the offset pill could open up the puzzle was brilliant, and the way the clues interacted was also very clever. Every clue played its part. Jay is definitely one of the elite setters.

@SilverKiMak Год назад

Simon, every time you feel like Maybe getting some colours removed from the grid - do it Immediately! Every single person watching these videos is a perfectionist geek and we feel physical pain when the grid is criminally littered by some useless markup. Thanks.

@chezpuff1206 Год назад

Can’t believe all the comments about the title! If a new sudoku comes out that is one of the best ever, it doesn’t mean that the ones previously given that title were any less incredible. This puzzle didn’t exist before people 😂

@EelcoWind Год назад

1:00:40 for me. This was mesmerizing!

@davidrattner9 Год назад

Lovely solve from you Simon!! Loved the thumbnail!!

@ServantOfSatania Год назад

67:28 Beautiful puzzle with many hidden restrictions I didn't get to appreciate until halfway into the puzzle and a delightful finish

@sugarfrosted2005 Год назад

Simon: "This can't be a six because of the fancy rule" 569 triple: "Am I a joke to you?"

@CrankyOtter Год назад

Lol 🤣 I got a loud ad for a speaker right after you mentioned Maverick

@alexandergilbert7572 Год назад

Awesome puzzle. My first digit in the grid was the 3 in row 4 column 3.... I worked out 4 must be doubled in the third column, Took me almost an hour and a half to find it.

@timdunkley9173 Год назад

There must be a word for it: the frustration you feel when you have spent two hours trying to get your head around something and Simon cant see it in five minutes.

@kgbgb3663 Год назад

That's nothing. I cant see it in _one_ minute! (Please don't edit your typo so I look stupid. Pretty please?)

@markbennet9058 Год назад

Late to the party, but this is a good one!

@markbennet9058 Год назад

The closing logic is what I remembered from solving on the CTC discord testing channel. I had wondered whether it might be available earlier, and I think it might (though I haven't checked) and I don't know whether it would have smoothed things much. It is ridiculously clever, though, to hide something like that to so late in the solve.

@edwardhughes-daeth9024 Год назад

All week 1hr+ videos ❤

@lunardancer6047 Год назад

I managed to solve this one in just over an hour, which I think is pretty good going. Something about the logic just clicked with me and I was able to see how the offset pill interacted with the others fairly quickly, and after that elegant break-in, the rest flowed from there (with liberal use of colouring and Goodliffe pencil markings).

@debblez Год назад

1:42:18 for me. Im surprised by how long it took you to get that r5c123 was 2,4,8. I got that in like 2 or 3 minutes. Of course that means you did the rest of the puzzle nearly an hour faster than I did.

@doriswlongAgoandfarAway Год назад

I was baffled throughout.

@LexAnnalyn Год назад

Happy me: Figured out the part at 40:05 by other logic pretty quickly-more quickly than Simon did, iirc. (Though since I used different logic to place that 2 in row 1 column 5, and because my not-great working memory means I forget any part of the logic that isn't written down, I'm doubting my method.) Not-so-happy me: Proceeded to break the puzzle 3+ times. Restarted a couple of times. Undid most of my work, returned here to check every step after that against Simon's work. Between the indexing and the doublers, there's a lot to keep track of. Probably doesn't help that coordinates are written "row#, column#, in x/y axis terms, that's "y, x." Opposite of what I did for so many years in school. -_-;; It's still fun. My working-memory weaknesses aren't as irritating when I'm doing a puzzle, simply because the stakes are low. And there's no deadline. I can take forever and make mistakes. ^_^

@mrjohnnypinkpants Год назад

by the time I managed to fill the 17 cage my brain had turned to mush and I needed to lie down in a dark room. great puzzle, that I will give another try in the future.

@Swisswavey Год назад

I found that really confusing. 88 minutes of toil. Happy that I was able to complete it though.

@srwapo Год назад

55:06, had a really HARD time keeping what cell the pills were pointing to. And I had to look to see why the doubler in Box 6 wasn't in Rows 4 or 6 (because Box 6 was the ONLY place the doubler in Row 5 could be, d'oh!)

@57thorns Год назад

1:03:34 By Simons logic, there is no 7 in the 20 box in box 5. This places the 7 in a domino in box 5, removing (as Simon points out) a space for the 7 in box 8. So I suppose 7 is now place in box 8? Which in turn very obviously make the 56 pair in box 9. And Simon spots a naked 6. and fills outbox 5 completely. That is _definitely_ a Simon point.

@HikingEngineer Год назад

I actually was able to solve this! but it took awhile to get my head around it for sure. As a good though exercise, think about if the top pill could be "12" haha

@capush2 Год назад

I was screaming at 40:25 for you to find that!

@annesorensen4004 Год назад

4 min after release, and you are at 40 min of the video 😂

@cloudbringer104 Год назад

I'm sad that you have made the video private. Being disabled I don't get to play games much any more. I was looking forward to the rest of the stream.

@bobh6728 Год назад

EDIT: This was fixed. Rules in description are from yesterday, I believe.

@Rach881101 Год назад

54:48 for me. Magnificent puzzle!

@KajtekBeary Год назад

Your first deduction about the field with 3 not being allowed to be a doubler was false, but you fixed it with second one, that was correct. In a case where in field with 6 there was 8 or 4, you could have a doubler in field with 3, wish either digit 1 (for 4) or digit 2 (for 8). So, theoretically you can have 1 r5c1, 4 in r5c2 and 8 in r5c3, with a doubler in r5c1. Okay, you discovered it later :)

@emilywilliams3237 Год назад

Simon, I always enjoy watching you work out an interesting logical conundrum - and you certainly had one today. Loved the reasoning around the indexing and how you found your first couple of digits. I found the doubler concept actually easier than I expected in the couple of puzzles from the January Patreon Reward (by Jay Dyer) that I tried, but still a bit beyond my abilities there. I understood what you were doing here, enjoyed the whole solve, and always enjoy your enthusiasm. Thanks for all you and Mark do to make this such a great channel!!

@popiop4 Год назад

Uh oh the description seems like it has yesterdays puzzle instructions

@michaels4340 Год назад

28:00 I think Simon missed the case where the doubler in column 2 is a 1, and r5c1 is a doubled 2? ...Or maybe that wouldn't work, actually, since you wouldn't have anything for row 1...

@jasono8783 Год назад

43:43 for me today- I had to watch the first 3 or 4 min of the video to jump-start my brain, but after that, I sailed smoothly on my own :)

@davidsanchez389 Год назад

Simon seems to have rule very soon the possibility that r5c1 can be doubled while reasoning with the wrong values for r5c23 and then deduce at 30:00 that the doubled 5 is in r2c4. Why can't r5c1 be the doubled 2 thus putting the doubled 5 in r4c4? -> Nevermind, it is the need of a doubled digit in c2.

@Urutsini Год назад

"I can't put a 7 in R8C6", then pencils a 7 in R8C6 . . .

@ProstoLyubo Год назад

I would love a video about designing a sudoku. Have you ever tried it?

@zelfitosmusic Год назад

Simon are you a Masochist when it comes to Sudokus lol. Doing these brutal difficult puzzles

@LiquorStoreJon Год назад

Uh Oh, The rules in the description are not correct for the puzzle Edit: I guess I wasn't the first to notice this. Sorry for the redundant comment

@NicholasLayton Год назад

Nothing makes me close out of a puzzle and turn the video off faster than seeing that there's a doubler rule

@wanderlustwarrior Год назад

1:26:24 for me, but I needed quite a bit of help and confirmation from the video.

@myfyrmadocjones Год назад

I really dont understand the placing of double 5 in the 17 cage at the start when the assumption made to place it was subsequently deleted. Watched this bit 3 times and it fries my brain.

@AmmoBoks Год назад

In r5c1, either the 1 is doubled (meaning a 2), or it's a natural 2. Either way, its value is always 2. So the 5 can be placed in row 2 and it needs to be a doubler. Since r5c2 is a 4, the location of the doubled 5 is r2c4.

@myfyrmadocjones Год назад

@@AmmoBoks why does it have to be a 1 or 2 though? This puzzle is so hard it was good enough to have been set by Phistomefel!

@RichSmith77 Год назад

@@myfyrmadocjones There has to be a cell in purple that has value 2, and the doubled 2 in column 2 means it cannot be either a natural 2 (repeating 2) or doubled 1 (repeating doubler) in column 2. So that purple 2 value has to be in r5c1.

@myfyrmadocjones Год назад

@@RichSmith77 thanks I will try watching it again

@Coyotek4 Год назад

47:12 ... Simon uses the phrase "best sudoku ever" so often, it's almost meaningless That said ... this really is an awesome puzzle!

@sugarfrosted2005 Год назад

Why does the text of the puzzle name explode at the screen at the end? Has it always done that?

@FranRojo91 Год назад

I feel like such a peasant watching the early logic and not understanding squat

@Mclovin-bs7mk Год назад

This one was so confusing for me because his pencil markings were so scatterbrained😅

@awilliams1701 Год назад

aww that trick with the 9's in the end.....that's just evil. lol

@justinvonwahlde6557 Год назад

Took me over 7 hours but I solved it!

@johnh2052 Год назад

I keep politely asking Simon to remove the bogus doubled 2 and 4, and he just won't. I'm not sure what I am doing wrong... I've said please, tried begging, tried insisting... what's left?

@nileprimewastaken Год назад

68:40 for me, after about 10 min of trying to find what I did wrong because i broke the puzzle at one point

@Rubrickety Год назад

This puzzle could be used as a reverse Turing Test. If you find it easy, you're definitely not human.

@Zacht1980 Год назад

26:08 - No Simon, a "Double Filtration" like the title says.

@57thorns Год назад

54:25 Or you can look at the 569 tripple in box 4. (56:08) 1:43 does not count as a Simon detour.

@adrianhead6272 Год назад

Completed in 31m51s.

@RichSmith77 Год назад

I think I was within five of your time. (Five hours, that is 🙂.)

@Tsunami14 Год назад

Am I wrong, or is 1,2,4 another option for the middle row of box 4? How was that disproven?

@kielblanton Год назад

Let's try placing it and see what it gives you. The pill (in row 5) is now telling you that a doubled 5 exists in row 1, column 2, which places it on a pill. The pills read the value of the cell, not just the digit, so the pill in row 1 is now telling you a doubled 1 exists in row 5*2. Because row 5 is placing a double 5, it can't reference a cell that's in a pill, because there isn't a 10th row or column in the puzzle. The same logic, for example, could be used to rule 2 and 3 out of R6C3, R7C3, R8C3, and R9C3, because then a doubles 6, 7, 8, or 9 would end up in a pill, which would be referencing a double-digit location.

@RichSmith77 Год назад

Kiel Blanton gave the reason most people would have given. But since you asked "how was that disproven", Simon managed to come up with a more complicated reason (as his way 🙂). Replay the video from 27:00. Simon's reason wasn't that a doubled 5 causes a problem in a pill, it was that it would mean a second doubler in column 2: the doubled 5, placed in r1c2 by the pill in row 5, and also a doubled 1 that has to appear somewhere in column 2, since we need a cell with value 2 in purple to index the doubler that has to appear somewhere in row 2.

@_-_-Sipita-_-_ Год назад

43:46 for me. clashed at 24 mins and i had to wathc

@Lucretiel Год назад

I think I missed something early on; why can't R5C2 be a doubler? I understand that its value has to match the omitted value of the doubler in C3 (so, supposing that a 2 was doubled in C3, we need to put a value 2 in one of the pills, and therefore it has to be R5C2), but why couldn't it be a doubled 1 in that case? (I understand the second proof about why it can't be a doubler, related to shifting all the same pill logic to the left one step, but I don't understand the proof in the absence of that step)

@Trygdesnylter55 Год назад

By doubling a digit in R5C2, you’ve removed the opportunity of putting the «undoubled» version of that digit into one of the row positions within the pills. If you then try to double another digit in C2 to replace that digit, you’re essentially recreating that problem for a new digit. Hope that made sense :)

@themorebeer3072 Год назад

If R5C2 was a double 1, then there would be no possible pill pointing at the doubler in R1 as 1, which breaks the rules of the puzzle. Or as Simon put it, you'd have to then have the value 1/2 doubled. Likewise if R5C2 was a doubled 2, no pill could point at the doubler in R2.

@HunterJE Год назад

Agh much like the previous puzzle with these kinds of index "pills" I again keep trying to make wrong deductions because as much as I'm used to the usual sudoku notation when it's presented in the form "r#c#," when it's a simple ordered pair of two numbers my brain thinks too Cartesian and expects the horizontal coordinate first...