Phistomefel's Sequel

[@Mason-lr5dz]

Oh man, nearly 2 hours of solving. Can't wait to watch Simon's sanity slowly unravel and then be reconstructed.

[@Wecoc1]

Yeah, I'm 1:50 into the video and Simon has already lost his mind 😆

[@studgerbil9081]

Simon is correct in his initial assumptions @80% of the time; Simon doesn't believe he's correct @80% of the time. It's like reading a classic Russian novel.

[@kevinbrownsword9558]

I was only watching and had to take breaks.

[@flobiish]

@35:13 "Which would force this to be blue." R1c10 and r1c11 have to be the same color at this point because of the 23 pair in row 5, so it breaks even worse. It's not important though because you've already proved orange in r1c10 is broken. Edit: oh, apparently you hadn't quite broken orange...so maybe this is important.

[@bobh6728]

Here is a blue cell with arrows looking at 7 blue cells, so it is a 6 or a 7, but we don’t know which!!!!!!!!!

[@xlittlep]

Could Sven somehow implement two-digit cell numbers where one corner digit and one central digit renders a double-digit number in the cell?

[@flobiish]

@44:22 LOL "I can just imagine Phistomefel sitting in his high tower, which I imagine has an eye over the top of it that sort of surveys the puzzling landscape and whenever anyone solves his puzzle it sort of zooms in on them and stares aggressively." Comparing Phistomefel to Sauron, very dramatic.

[@Joseph125]

Phistomefel and Sauron, both known for rather troublesome rings

[@AndersHaalandverby]

That's really mean , comparing him to Sauron, I mean we all know Frodo wouldn't stand a chance if that was true...

[@afrayedknot81]

Here's a cute trick - around 38:00, the 23 pair in r5 forces r1c10 and r1c11 to always be the same color. This makes resolving the r1c10 color much easier

[@LithmusEarth]

I said that same thing. the 23 pair says that they must be the same color. from there combine with his 5v7 theory is actually 5v8 and you can break the 8 so that it's only 5. you get a like sir. The only difference is i said it around the 36 minute mark, but that's the same thought space he's in.

[@stangerrits6712]

Well spotted. Once you see it, it’s quite obvious that the 23 pair is pointing exactly to the issue you want to resolve :)

[@ingiford175]

Was seeing this early, and was wondering if/when he might see it.

[@renedekker9806]

I have been screaming “23” at the screen for 10 minutes 🤣

[@ErzengelDesLichtes]

I was a little confused reading the instructions before I realized “Normal Sudoku rules do NOT apply.” 😂

[@colej.banning2419]

At least Simon didn't have cause for complaining about having to do Sudoku in a Sudoku puzzle.

[@RichSmith77]

1:43:32 "That doesn't determine this digit, I don't think, because ... we've already determined it". Simon attempting, and failing, to determine a cell that's already filled in is a new one. 😂

[@bobh6728]

No, that is not new. I call it a Simonized cell. That is where there is an easy way to fill in a cell but he finds a longer harder way to do it. He did that the other day when he found a cell that had to be a 2, but he even said he was not going to put it in yet, and finally found it was a 2 by a completely different reason.

[@RichSmith77]

@@bobh6728 Are you referring to the previous video, "A sudoku with a bonus objective"? I mean, he had a reason for not filling in the 2 straightaway - namely, the bonus objective referenced in the video title. I don't remember him needing a different way to get the 2 - he was just waiting until he had the 30+ digits placed before using the given digits.

[@iain_nakada]

I enjoyed that.

[@richardfarrer5616]

Today I learnt that, if you get fancy with hexadecimal and put D in a 13 region then you don't get marked correct. It was only after watching Simon's solve that I tried deleting the Ds and got the validation I so crave.

[@NinjarioPicmin]

yeah same, i had D's and K's in my solution and it didn't count until i removed them

[@darci4434]

PHISTOMEFEL IS BACK!!!!!!!!!!!!!!!!!!!!!! I'm so excited to see it again

[@margaritashcheglova8670]

* random noises of happiness *

[@majora4]

I was getting along reasonably okay, albeit with frequent help from the video, but I made a big error by misunderstanding the rules. I assumed that the puzzle only uses the digits 1-9 and therefore no region could ever have more than 9 cells. But the rules do specifically say "number" not "digit." Based on this erroneous reading of the rules, I concluded that r4c10 must be blue to avoid joining up three previously disjoint orange regions into a size-11 region. Things only started going wrong when it came time to deduce the value of r7c10 and I found there was no possible fill. I either forced myself to have an orange 4 region directly next to a blue 4 region or the blue/orange count in the column was wrong. With the benefit of hindsight, I suppose this is precisely the kind of "trick" one should expect from Phistomefel. He's not named after the devil for no reason, after all...

[@jeroenrl1438]

Thanks, I was wondering about that (making the same assumption about r4c10).

[@Barteks2x]

I blame the software used here for this, for not allowing actual numbers to be placed in cells (made exactly the same mistake, and generally that just makes me give up since I basically have to start from the beginning).

[@lewsouth1539]

"Ominoes" seems a good enough name, but it so happens they're already widely known as "polyominoes" (yes, even those consisting of but a single square).

[@Oznej]

The single square is known as a monomino. Such a fun word to say - and type!

[@HANSSTIP]

Do doo be-do-do be-do-do be-do-do be-do-do-doodle do do do-doo do!

[@StorymasterQ]

It's a combination of ominous and onono (British English for "Aw HELL nah), so it's apt.

[@16m49x3]

38:00 Here i looked at the consequence of the 23 pair. Whichever way they go the two unknown cells must be the same color. The rest follows

[@Sternentier]

Phistomefel... 2 hour video... I think I'll just watch Simon do it.

[@David_K_Booth]

As the mathematician Piet Hein wrote, "A problem worthy of attack / Proves its worth by fighting back." That was one tough puzzle.

[@agasteenbrink]

I saw the title and I love it already, this will be a banger

[@himura-miki]

"We don't know what this is" Actually, this is this, and that is that. "We probably do, but I don't know what this is, I mean to say." Oh, well that's fair. Sorry. Please continue. You're almost there; you can do it, Simon.

[@illdie314]

1:43:32 "Now that doesn''t determine this digit... because we already determined it" another classic CTC knowledge bomb!

[@HunterJE]

1:52:25 The final hypothetical considered also breaks because there's no way for the 6 region to grow to size 6 without taking another blue and becoming size 7...

[@RoderickEtheria]

No, there is a way, but the orange would still be size 6, and there would be a single orange in the bottom right corner. It's the size of the orange that is the problem.

[@inspiringsand123]

Rules: 02:29 Let's Get Cracking: 07:24 Simon's time: 1h46m58s Puzzle Solved: 1:54:22 What about this video's Top Tier Simarkisms?! Phistomefel: 4x (00:27, 00:53, 01:48, 1:29:23) Bobbins: 1x (1:50:15) ​Scooby-Doo: 1x (1:29:37) And how about this video's Simarkisms?! Ah: 21x (08:50, 22:15, 22:48, 23:39, 24:13, 24:13, 26:01, 28:05, 29:01, 29:20, 33:39, 46:05, 56:04, 1:09:29, 1:15:15, 1:16:31, 1:17:54, 1:17:54, 1:31:56, 1:46:02, 1:51:53) Wow: 15x (05:31, 34:28, 43:19, 51:22, 51:25, 56:04, 56:09, 1:04:14, 1:05:14, 1:05:38, 1:14:09, 1:42:43, 1:45:56, 1:52:10, 1:53:47) Hang On: 11x (09:43, 11:54, 19:35, 24:09, 24:09, 24:09, 1:00:04, 1:08:51, 1:36:46, 1:37:33, 1:40:38) Sorry: 7x (11:57, 22:21, 22:50, 37:47, 48:07, 1:04:52, 1:31:14) Beautiful: 5x (29:25, 42:29, 1:09:06, 1:13:07, 1:32:35) What on Earth: 4x (30:09, 55:30, 1:00:52, 1:10:25) In Fact: 4x (04:12, 33:34, 47:04, 1:53:50) Good Grief: 3x (56:04, 1:20:07, 1:35:38) Naughty: 3x (03:32, 04:06, 52:30) Fascinating: 3x (1:03:16, 1:33:13, 1:33:42) What Does This Mean?: 3x (1:03:27, 1:34:47, 1:48:46) Useless: 2x (1:29:54, 1:30:22) Clever: 2x (41:16, 1:39:04) I Have no Clue: 2x (1:27:41, 1:50:50) Extraordinary: 2x (1:18:36, 1:18:39) Obviously: 2x (02:20, 32:20) That's Huge: 2x (24:13, 24:24) The Answer is: 1x (1:30:07) Stuck: 1x (1:29:32) Break the Puzzle: 1x (03:27) Incredible: 1x (58:48) Ridiculous: 1x (1:52:02) Going Mad: 1x (1:41:45) Come on Simon: 1x (1:06:48) Bizarre: 1x (25:00) Puzzling: 1x (44:30) Unbelievable: 1x (1:05:27) Whoopsie: 1x (1:23:04) Phone is Buzzing: 1x (1:06:31) Plonk: 1x (05:53) Baffling: 1x (1:21:51) Have a Think: 1x (1:02:23) Nature: 1x (32:34) Most popular number(>9), digit and colour this video: Eleven (4 mentions) Three (149 mentions) Blue (272 mentions) Antithesis Battles: High (2) - Low (1) Even (4) - Odd (1) Row (10) - Column (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!

[@Voiyce659]

Simon please speak kindly to our solver friend Simon and refrain from calling him names such as 'useless individual'. This is a safe space where we do not tolerate bullying and name calling. Thank you Simon 😊😊 Thanks for the cracking

[@mstmar]

There was a bit of beautiful logic missed that would have simplified a part of the solve. @46:00 simon mentions that the cells in r7cs78 are different, and that they sum to 6. so the orange one is a 4 or 5, since it connects to the 2 cells above. with this knowledge, we can say that r6c9 is blue. if it wasn't, it would make the orange in r7cs78 a size 6 region. this blue cell really simplifies the logic @58:00, r7c11 is not a 5 or it would need to connect to the blue cell to get the arrow to count to 5, but in doing so would make it a 6 region, a contradiction. it being a 4, it can't connect to the blue cell at all, placing an orange in r6c10.

[@rentalcustard]

At 21:20 or earlier, you can see that the 23 at R3C6 can't be 2. If it were 2, it would be the colour in the 6-set which appears 4 times. So then you either put a 4 of the same colour next to it, which breaks the puzzle, or you put a 2 of a different colour next to it, which also breaks the puzzle.

[@ajhanaimu2343]

3hrs trying to solve it using 1-9 digits almost filled the grid but my brain stock. 😭 to find out that you can go above 9.

[@BryanLu0]

A recurring pattern that Simon missed is arrow cells having their region size fulfilled by the extra cells that would be given by the arrow

[@flobiish]

@49:06 "9 We're almost getting to the point where it's not possible." You didn't notice the 3 cells in the top left and that's 12, but it's even more broken because it forced r3c1 to be an orange 1 which adds r2c1 to the blue count and it forces r2c2 to take r3c2 so it's not also a 1 region giving an additional 3 blue cells and we're up to 16 blue cells in the region...and the arrow can only see 10 cells total. (You did notice those 3 in the top left a little later.)

[@YellowBunny]

Using the green color to indicate that two cells have opposite colors is just an really bad idea especially considering that you already used a black line for the exact same purpose earlier which is much clearer.

[@HunterJE]

1:25:35 This way around the blue clue must be a 3, if it's a 5 the purple would have to be blue and would connect with the clue resulting in a far-larger-than-5 region (combined with previous work this means the 5-3 is resolved the same way around regardless of the shading)

[@daleomiller]

That’s the place I started shouting at the screen.

[@caliopefinn5121]

The software has a solution as long as you don't enter Large numbers in the 2 digit regions. So feel all the 1, 2 , 3, 4, 5, 6, 7, 8, 9, sized regions with the appropriate number and leave only pencil marks for the 2 digit regions and the software will tell you if you are correct

[@michaelawilliams]

The whole time Simon was playing with the upperleftmost arrow, trying both 2 and 1, it was driving nuts watching him fail to notice that it simply could not be 2. He made pink squares and green squares surrounding a hypothetical two on the arrow, but did not carry that same logic to very next square. If he had looked at them, he would have realized there was the square in the middle of the three green squares had nowhere to go that would not have connected it with one of the other two green squares, thus forcing it to be a 3 or higher. He kept saying that about arrow square while completely missing it for the square it was directly pointing at.

[@adipy8912]

1:06:49 Good words immediately followed by bad words

[@crystalgehrt8861]

It's amazing that this solves, but I'm not surprised - It's Phistomefel! It's beautiful and amazing, of course, and I felt very accomplished solving it. I also enjoyed watching Simon, but I wish our friend would stop calling himself useless.

[@JK7H]

I immediately watched row 3 and thought to myself that the sudoku is broken

[@RichSmith77]

I initially mistook the arrows as possibly including the arrow cell too. So for a while I thought I had a 123 triple in the row, making the two-arrow cell a 4 or 5 only. Fortunately, I realised I was making two incorrect assumptions fairly quickly. 😂

[@annesorensen4004]

I’ll save this for tomorrow and make a ton of popcorn 👌😀

[@mastercreative6752]

I know you try to do more of the easier puzzles nowadays on the channel, but I prefer the longer ones so much more. Because why should I watch 2 master solvers have a go at a puzzle if not to see them do puzzles that I could never solve myself? It is just so interesting to see you or Mark at your maximum capacity for these puzzles. So almost 2 hours for Phistomefel, that's exactly what I want from a cracking the cryptic video!

[@michaelbellecourt3875]

I'm still nowhere near good enough at these puzzles to do them on my own, but I *really* enjoy taking a stab, progressing until I get stuck, and then watching CtC videos until Simon and Mark catch up with me and reveal the next step. Then I pause the video and move on, repeating the cycle until we finish together. Thank you so much for hours of joy!

[@jl2399]

First time I've seen a video on this channel where double-digit numbers were allowed in cells, so I had assumed they weren't. Wish that had been called out more clearly. I feel like normally things are very clear and if anything over-specified. Cost me an hour going down the wrong solve path. Anyway, still love the channel and what a beautiful puzzle.

[@Dezzy529]

22:50 - thats how I feel about every puzzle I see on this channel! 😂

[@Gumnut08]

Tip for simon. When following a logic path to decipher a "pair" like you were with the 35 pair in the 9th row, when you switch them around you should always follow the exact same logic path as you did previously.

[@richardgower2605]

To be honest, I was shouting at the top right part of the grid thinking there's no way R4C10 can be orange as the region would exceed 9 cells. I incorrectly assumed region sizes must be 9 or less. Admittedly my incorrect assumption!

[@cathybryant5119]

I was surprised that I was able to solve this one. I did get stuck near the end, but put it aside for a bit and came back to it, and finished it up. There is a new feature Sven has added to the software that is nice for this sort of puzzle: you can change the pencil marks from listing all the candidates, such as 123456789 to "compact" 1-9. It is under settings (cog wheel-> Experimental->Compact Pencilmarks: On). I don't use this feature when doing Sudoku, but I found it helpful in this puzzle to show the range of possible values.

[@NinjarioPicmin]

Yes same! I never like to use that feature but turned it on for this and it did help a bit for sure!

[@peaches760a]

After about 1:17:00 r6c2 must be blue. If it was orange it would complete the set of 4, making r6c1 an isolated (1) blue. It would also make r5c2 blue isolating r5c1 as a 1 and you have two 1s touching.

[@longwaytotipperary]

Good luck, Simon! 🍀

[@davidrattner9]

😃 For a Phistomefel puzzle...that took nearly 2 hours..❤

[@longwaytotipperary]

@@davidrattner9 ❤️

[@bait6652]

A dual coloring graph(adjacency and then size) Sure why not...1:50hr solve of 12x12 uhhh....the joy on his face as he describes the puzzle. Lets get cracking.

[@Barteks2x]

I got very confused by the rules because of the way the software works... I implicitly thought none of the regions could be bigger than 9 cells because you can't put a 10 or higher digit in a cell... but of course the rules don't say that. The software is just too limited. I gave up trying to follow solving it along by myself after that mistake, because I would have to start from the beginning.

[@Zalaniar]

I definitely should have tried this one before watching... I've made a solid handful of deductions before Simon and I'm still only halfway through.

[@lorijohnson773]

oh god. a phistamapheld... I've been drinking. There's no way I can do this. But I love watching hte colve!

[@nonyobisniss7928]

Really cool puzzle. Made a logical slip towards the end but was able to backtrack and continue logically. And I managed to beat Simon by a couple of minutes (usually it's the other way round).

[@artursruseckis4242]

Meh, I was on the right track until I started to use the logic "if I color this cell in X, that color's region will exceed 9 which is not valid". So instead of 13 region on top right corner I had three 6-1-6 regions which messed up the value of an arrow and thus everything broke down :(

[@Escviitash]

I solved it, but because I entered Ds in the 13-region and Ks in the 20-region, as these letters represents 13 and 20 respectively in a base-21+ number system, it told me that my solution was wrong. I tried removing the Ds and Ks, which fortunately caused my solution to be correct. It would be nice if the app supported letters for values higher than 9 and that setters at the same time remembered that it is supported, or that the app completely ignored letters when checking the solution

[@258thHiGuy]

Also, cells with arrows only pointing in any of the four cardinal directions can only be as high as the amount of the cells they see minus 1, like the up arrow in the very last column can't be a 5 because it has to include the cell itself, making it a 6.

[@mahmoudabdelghany7112]

I have zero idea why this puzzle solves xDD (but it does).. I think that's how a brilliant setter can taunt you. Brilliant and absolute fun..

[@MarkBennet10001]

I wish you (Simon) would sometimes use yellow and mid grey. The Purple you have here with Blue does not work for me (too tonally similar). The solve is still awesome though.

[@rentalcustard]

49:00 the contrast between how quickly Simon can see things that I would never see and the obviousness of things he misses never ceases to amaze! The count for blue in this case would be at least 12.

[@diseabronx5075]

You know it’s a good puzzle when Simon brings out he colour wheel.

[@user-v4v5c]

He uses this word "ominoes", which leads me to believe he isn't familiar with the concept of "polyominos"

[@Crystal-ef3dm]

What an interesting puzzle! I needed help after doing the yellow/purple area, but was able to get the rest of it after that. Took me just over two hours to finish... very hard but satisfying! Also, for designating squares were part of the same region (but I didn't know which color), I used the pen tool, which seemed to make more sense to me.

[@davidrattner9]

Absolutely another breathtaking puzzle by the man himself!! Superb solve Simon!! The honor, privelage and sense of satisfaction you get when finished is extraordinary.

[@Anti-anti-adblock_account]

I wonder if it is possible to solve if you follow the rules literally, and only colour the regions after you have placed them all into the grid.

[@iambicpentakill]

"These are one of each" - labels them the same color to remember that Our brains work in different ways, Simon.

[@chipsounder4633]

At 45 mins or so, i see something with row 7 column 11 cant be orange. As it sees the 1245 pair in the row so it has to be higher so cant be orange as it would have to be a 3

[@titusadduxas]

Yay - 3:29:08 - Yes I know it’s a long time but I kept going back after not being able to resolve the bottom right corner!

[@matthewread9001]

1:50:30 it literally finished the puzzle, why undo and check other answers?

[@glorkspangle]

r5c6,7 are different colours, so r1c10,11 must be the same colour.

[@eliana_d]

1:31:21 i really hate when simon does negative self-talk like that. i am sorry that someone instilled those beliefs in yourself

[@Larwood.]

It really stressed me out that it took him 21 minutes to see that r6c9 couldn't be orange 😅

[@kutludenizilgaz2175]

Mr Simon! Simon is one of my favourite people and i demand that you stop insulting him

[@Jigkuro]

An intimidating video length, but I managed in just 59:33; I felt it flowed pretty smoothly given its size. Now to find out what tripped up Simon (and unfairly yell at my screen about it because I already have the solution.)

[@TheHonorist]

R6C9 is open for minutes at 1:08:30 and it forces so much solution ... I yelled at my screen so many Times... 😂❤

[@davidmiller9485]

Considering how much banter and logic is vocalized, I'd say he didn't do to bad.

[@GoldFinalStarmanDXJr]

"we don't know whether purple is blue or orange." Haha

[@stjernis]

Seems this would be much harder on paper, because there's nothing in the rules restricting cell numbers to one digit, only Sven's software is.

[@stjernis]

Now when I went back to it and finally managed to solve the thing I realised I made a bad assumption in that the puzzle would be limited by Sven's software.

[@chironchangnoi]

Simon is a Zen master 1:20:00 right ok so we don't know anything

[@HunterJE]

41:30 There's another way to look at this logic that ultimately is about equivalent to what Simon does but I think deserves mention just because it is such an elegant and pretty thing - currently the 23 clues both see two of their own color with one unknown cell to go. Since the clues are different colors, if the unknown cells are different colors that will affect the 23 clues' counts in the same way, resulting in the same final count and breaking fillomino rules. Therefore r1c10-11 must be the same color (and since we know the logic on the clue in r1c10 won't allow both to be orange they must both be blue).

[@goldcakes]

2 hours huh? I guess I'll need to free up at least 6 hours to do this one

[@FloorSB]

1:30:23 you absolutely not! you're wonderful!

[@MariaVlasiou]

I don't understand: what does "far too large" mean? There is nothing in the rules prohibiting large regions. 1:00:22

[@sagov9]

The problem is: the number in the cell with the arrow needs to indicate both the size of its region as the number of oranges it sees in the column. If all of the selected cells were orange, the size of the region would be much larger than the number of oranges the arrow cell sees.

[@srwapo]

Almost a 2 hour video? Guess I'll try solving Mark's puzzle instead, today!

[@richardfarrer5616]

Well, that comment didn't age well, based on te length of Mark's video - which I haven't yet looked at.

[@Gonzalo_Garcia_]

63:16 for me. Great puzzle!!

[@kadlerio]

@1:02:50 Simon finally figures out that the blue cell can't be 5, but you can sort this out using the basics of his logic about the orange region being too big without even thinking about the blue region. Since the orange region can be at most 5 large, the corner cell between the two dominoes can never be orange or they would connect and become at least a 6 cell region. Since now this has to be blue, if you made the blue cell to the right be 5, then both the cells to it's left have to be blue and then they connect to that cell and form a 6 cell region.

[@kadlerio]

And at 1:08:07 Simon finally figures it out

[@brettduffin8412]

Eye digress... must be stuck.

[@sanchan619]

Demand for Phistomefel to do a face reveal next time Simon solves the most brutal, impossible puzzle from him.

[@marcellmagyari]

He gave a big interview with camera like a year ago

[@sanchan619]

@@marcellmagyari I found the interview. Thank you.

[@57thorns]

22:56 or just look at the impossible blue region of size 4 you get if purple is blue.

[@57thorns]

And 24 minutes in Simon forgets the rules of the arrows. This is going to be a long video...

[@IlliniRocket]

Took me a bit under 2.5 hours. Mirrored Simon's solve pretty much exactly. Was stuck for a while after failing to realize the top-right cell's color was already determined, thereby resolving the 2-3 pair in row 5. The thing I really like about Phistomefel puzzles is that, while they may be lengthy, they usually never feel out of reach, for me at least. This is a great example of that. There never seemed to be more than one or two usable arrow clues at any given time, which limited the noise that makes lesser puzzles a real grind.

[@BremSterPuzzles]

I struggled with this one when I tried it, I was glad I was able to use Simon to get unstuck a few times and then able to work through the rest myself. Thank you very much.

[@bait6652]

8 rows complete and just wanna tap out. Started on the topright got 1/8 done and stuck came to look where he opened(topleft). Got 1/4 done but had 2 grids/color system cooked dinner, Manage to meld the 2 systems, midphase got even harder. Came back to see how he got to the midphase ..heh he endeds up with 4 colors to but didnt seem to struggle w how to match them. Would love to see someone design one where Simon has to take a breather not cuz of an appt but due to the puzzle... Think he quit one? That thermo wheel one still takes the cake tho.

[@samplename5159]

A number of times i found myself screaming at the screen - this one is easy, i did that in 5 seconds flat it's just about how one arrow affects the other! But... somehow Simon solved the entire thing in half the time i did 🙃 Once you know which way to look you can really appreciate how smart the puzzle construction is, there are no clues that aren't perfectly placed to make the deductions interesting and brain stretching. Phistomefel does it again, and so does Simon, thanks to both!

[@windybeach2184]

I just had to hunt down the previous puzzle again, for a refresher course before I attempt the big one! kzbin.info/www/bejne/pJqbc2xvjJuLqc0

[@cathybryant5119]

1:03 When Simon made r7c11 a 4, he had proven that the blue region couldn't be a 5 if it took r7c9-10. When he said that made the region a size 4, did he disprove that it couldn't be a 5 if it took r9c11? I know I disproved that when I solved it (can't remember how at the moment), but I'm not sure that Simon has definitely ruled it out at this point in his solve...

[@RichSmith77]

It's an arrow restriction rather than a region size restriction. He's looking at how many blues the arrow can count in the row. The central orange pair, above the arrows, are 4 or 5, meaning one of the arrows is counting at least 4 oranges in the row to the left. So there's at most 2 blues to the left of the arrows. One of the arrows will be blue, so up to at most 3 blues left of, and including, arrows. For r7c11 to be a 5 on the arrow, it would have to see all 3 of these, plus 2 immediately to its left. Simon's proved these cannot both be blue, so the arrow cannot be a 5.

[@cathybryant5119]

@@RichSmith77 Thanks. That was baffling me a bit. I probably solved it the same way, but it flew from my mind!

[@LithmusEarth]

Simon about 36 minutes in you can deduce look at the 23 pair that they are pointing out, if the orange is a 3, both of those white cells are orange. if the blue is the 3, both of those cells are blue, they are always the same color, because they give one for the 3 and take away one for the 2. until you bring up the 5/7 argument i would have just marked them both green, and not known anything from there. that means, as you are doing your 5v7 argument, 7 isn't actually valid. you aren't picking up it's neighbor cell making it 8, and it cannot see 8 orange cells, it's not orange. it's blue. it's a blue 5. and it picks up the cell behind itself. and yellow is orange.

[@LithmusEarth]

After an hour an eighteen minutes in, your little 3/4 HAS to take the right cell if it takes a cell at all. it never makes an overturned "T" shape, that space is always blue. why? if you make that space orange instead (row 6 column 2) you create this little blue island in column 1, next to that orange 1... which can't grow or it attaches to that T shape you just made, therefore, cell (R6,C2) must always be Blue. I haven't figured out yet if the orange is 3 or 4 yet though. Just maybe you could use that information to solve that portion.

[@LithmusEarth]

1:19:41 Okay, Simon. "If [R5C2] is orange, then [R6C2] is blue. If [R5C2] is blue then then [R6C2] is blue." You just said, regardless of the first cell, the second cell is always blue. You proved my problem/solution through a similar means, but then you don't mark that that cell is blue.

[@ericpraline1302]

What a diabolically fiendish puzzle, thanks. Some excellent logic and as far as my solving experience went it didn't really let up all the way through.

[@PathOfShrines]

That's one hell of a puzzle. 146:28 for me. Some amazing reasoning required here.

[@davidjspooner]

Spent the first hour of my time rewinding the first 10 minutes of simon time to try and follow his explanations. 🤷

[@joshg2188]

Love getting to the end of one of these after I've taken a day or two to leisurely watch the video, because it's only after Simon has been staring at the same puzzle for two straight hours that I, lounging on my couch, can briefly spot a few things faster than him. Great solve.

[@iuriikononenko9238]

2-3 point tell actually not that 5 is blue, but that 2 cells there are of same colour, thus can't both be orange resulting in 8 region.

[@eleanorpenklis9883]

This is exactly how i wanted to spend my Friday night and I'm not even joking...

[@baumundallesandere]

I watched you solve the first 20 min and then solved the rest myself. That was so fun!

[@258thHiGuy]

I kinda wish these rules specified whether or not every arrow had to see at least one color to add to their cell's total. Like if a cell has three arrows pointing outwards, it has to be at least 3 in the cell

[@sjm6280]

Sometimes a group of green cells is "all the same color", sometimes it is "one of each color" 😅 Fantastic puzzle, although it may have taken much less than 2 hours

[@tmhood]

Finally did it in 161 minutes. Not exceptionally hard, but you have to keep fighting till the end.

[@iuriikononenko9238]

Wow! First time completed a puzzle from such a long video.