Thank you so much for featuring my puzzle! Simon, I am always impressed by your ability to so calmly and pedagogically explain every deduction while solving the puzzle for the first time. You really did a masterful job making it all understandable even for viewers unfamiliar with fillominos. On another note -- In case there is someone who liked this puzzle but thought it was much too easy and that the grid was way too small then you are in luck :). I have another sudoku-fillomino hybrid coming up on logic masters germany in a week or so that should provide quite a lengthy challenge.... :)
This was very fun to watch Simon work through - thank you for sharing it! And I agree, his ability to explain all of his logic is indeed impressive and very helpful.
@@tezcharold While he was explaining it the only logical conclusion you could have come to already was "How many parameter cells do you need at the edge?" So yeah, it kinda was a little bit weird for him to ask if viewers would accept that.
@@tezcharold No, I understand his concern. If you think about his expanation, it was intuative to understand but it wasn't rigorously proven. Its proven enough to be useable, but if it were a mathematical proof, it wouldn't hold up to scrutany. Consider Simon's personality, and use him proving any Set theory puzzle. He shows it using absolute terms in multiple ways by treating the grid like an algebra equation. Whereas this proof was very "feely."
i would say that for myself i intuitively understood and accepted it. however, i'm not sure if it would meet the criteria for a formal logical proof, which is i think what simon was concerned about. it was of course true, because simon's brain has the most insane knack for intuitively understanding things like that!
@@dwebb2805 the proof I used is that the best case scenario is high digits on the top and bottom of the column and low digits in the middle. Taking the corner digits vertically out, you don't have enough squares to fill in all the low digits.
Ahhh, this Sting guitar intro - such a good song and such a lovely version you played! Also such a lovely occasion - i don’t know the birthday girl Alexis, but I’m sure you’ve made her very happy with that thoughtful gift. While I’m already commenting: I really appreciate you both on this channel for always taking the time to be kind to viewers, be it through little birthday greetings, your general friendly, polite, and calm conduct on screen, or when taking the time to explain things to new viewers. It’s such a welcoming place to be on the internet that I always want to come back to it even if I have little time in the day. All on top of those very interesting and difficult puzzles of course - that’s what hooked me in ca. 2.5 years ago! - but we all know already that this channel is the home port of great puzzle makers and puzzle solvers alike. I’m glad you’re here to share the joy of puzzles with us so many years into the channel (and somewhat less years into the pandemic), that you do it in such a friendly and welcoming way, and that so many people have come to participate in the fun in a (for the most part) respectful and kind manner. Thank you for your work and efforts!
Not sure if this is rigorous enough either, but proof that the sudoku grid can't be within 1-square of the puzzle edge: Suppose a 9x1 column had a best case arrangement {875312469}, allowing 9 and 8 fillominos to escape freely, 7 and 6 to escape but sealing in a 1x5 region. You're left with 10 squares to populate 5+3+1+2+4 = 15 area worth of fillominos.
Yeah, that's actually the logic I used for this deduction when setting the puzzle :). No matter the arrangement only 4 polyominoes can escape and the remaining five would have a maximum of 10 cells.
As many times as Simon has appologized for something that people were "screaming at the screen," I never actually screamed at the screen until today. The 9 in r1c1 had me screaming "Simon, do sudoku! It's a nine! IT'S A NINE!"
I first watched Simon's solve. There were a few steps I couldn't have guessed (the 7s), and a few others I noticed before him (the 1s) and shouted at my screen. Once he discovered the location of the sub-sudoku grid, I was so high on joy and excitation I had to give the rest of the puzzle a try by myself. I solved the rest alone in 53min. I'm a bit sad I didn't solve the entire puzzle by myself, but still very happy I did solve the end! A big thanks to Simon and Mark for making me discover the "real" sudokus and puzzles. I'm realizing that my level in puzzle solving has so much increased: at first I wasn't able to solve the same sudokus as you, and now I'm able to solve even the hard sudokus (considering the difficulty proportional to the length of the video). So a big THANK YOU!
83 minutes? And I'm out of munchies 😔 Halcyon Days indeed, thanks in large part to our hosts. Deep gratitude to them and to all who tapped their creative source, 81 squares at a time...or more.
Love that Sven has added a 2001 reference when the software can't give a solution rather than the old style of just highlighting everything red as an error
me: i'm tired, i'll watch the beginning of the video and then go to sleep and watch the rest tomorrow during breakfast simon: ...and we'll be back later with another edition of cracking the cryptic me: no way it's been an hour and a half already
Nowadays I don't even expect a video of less than 1-hour in length, I set my schedule to accommodate it and it feels like I have a lot of spare time whenever it's a shorter video... Not complaining about short videos, just pointing out how it fited so smoothly onto my daily routine the long ones that I don't even noticed it...
Impressive! 46 minutes for me. The puzzle maker has promised us a second harder one which he'll release on LMD in the next week. Hopefully Simon does it as well.
WOW, simply genius. I am again speechless as how this type of puzzle can exist and have a unique solution. Amazing setting and really enjoyed your solve Simon. Thanks CTC for my nightly entertainment, look forward to watching every day.
Thank you for your kind words! This puzzle was actually relatively quick and painless to set compared to some others :). If I recall correctly it took around 6-8 hours for the whole process.
I have scrolled through the comments that are here as I am finishing watching this video, and am delighted that they are almost entirely very kind, and more than kind, very highly enthusiastic about this puzzle and the video. Thanks so much, Simon, for a wonderful evening of thinking and understanding. And I am glad that you have begun to note more often when we are granted Knowledge Bombs on CTC - it was a regular thing back when I started watching sometime middle of last year, and (though the KBs have not been fewer) the mention of them has been less often lately. I feel as if I return to my roots here every time you grant a KB and identify it as such!
1:07:10 I came to this point and noticed a sort of meta insight that you could use to define these early: The number of cells available for the 8 in the 4-8 pair is actually 9 so you would have to place a 1 fillomino to complete it. If the 8 was below, then the 1 fillomino could go in 2 locations with no restrictions meaning the puzzle would have 2 solutions. Assuming there is only one solution as we do on this channel then we know that the 8 must be above, albeit through the presumed uniqueness of the puzzle. Of course it gets filled in for the single solution by sudoku later but I thought it was an interesting notion and I wonder if there's any cheeky puzzle built where meta knowledge about what causes multiple solutions would have to be used
39:04 with a time less than half of this video's length this has to be one of my best times. Usually I would never have attempted a puzzle that is accompanied by such a long video time, but the combination of sudoku and fillomino was really intriguing to me. Great puzzle, great solve, great time :)
This is truly an astounding puzzle. Took me a hair over 2 hours, and every breakthrough was well thought-out and felt so intentional. This is an all time great for me. Thank you for continuing to highlight and share gems like this!
I wasn't even going to try this when I saw the time. However, I jumped in and it was a lot of fun with some fabulous logic. Great job, Magnus... and Simon!
This is one of the very rare ones where I was a bit quicker with some conclusions and I suddenly feel very powerful. These videos are always so comforting either way, but when I get what‘s going on it‘s even better
Very chuffed to see this here. I was one of the 20 recommenders - this puzzle is stupendously good (and deserves a prize for the name alone). It took me 2 hours - I could not tear myself away - a time I'm happy with in light of Simon's time. That 7 deduction is indeed truly delightful.
This one was really enjoyable. I found it challenging enough to be engaging, but the logic is straight forward enough that I never felt stuck. It took me a long time, but I was able to keep making steady progress until it was finished. Awesome puzzle!
That was GENIUS. Absolutely ridiculous. Bravo Magnus, and bravo Simon! Regarding a proof that the sub-grid could not be beside a one-cell strip, it helps to think about the secret: every digit in the sub-grid’s outer columns or rows differ and are part of a valid fillomino and therefore must be able to access 45 cells between them.
i was able to place the grid fairly easily, but i had to keep referring back to the video because i got stuck in the fillomino quite often. brilliant concept, puzzle, and solve! seems tricky at times but there is always a simple logical explanation for every step, and that's what i love about it. thank you for showcasing this one, this channel is helping me to steadily improve.
'Dip their roots into the loam of blue' is a nugget that only Simon is capable of giving us. 87 minutes for me. Very innovative and also enjoyable to solve
The pace of this video is testament to the skill of both Setter and Solver. Usually if I see 1hr+, I assume it’s going to include long periods of paused solving for Simon to think through the logic and spout off some frustrated bingo phrases (and I still watch regardless). However, this solve felt pretty consistent in the movement from bit of logic to bit of logic, making for just an incredible flow of solving which made this feel like the shortest 1hr+ video ever on the channel. Cheers to everyone involved.
I am extremely pleased with how cleanly Simon drew the lines in this puzzle. It's often a minor concern of mine with puzzles like these that involve lots of line drawings and coloring that the grid will end up looking rather chaotic. Of course, it's expected that the grid will look chaotic during the solve but I personally love seeing how crisp and clean a fully solved puzzle looks; especially puzzles with a variety of colors and markings.
It is obviously very important to announce that you are playing God of War. 🤣 Good luck to you, it can be tough (depending on your difficulty settings) and I hope you enjoy every minute of it! Also, I love the long videos. They're my favorite. I use the videos to help me get to sleep, as the logical process is very relaxing for me, and the longer ones make it easier. That being said, I enjoy all the content from CtC, regardless of the length.
That was amazing! And yes, you did completely prove that the grid couldn't be within 1 cell of the perimeter before doubting yourself and going round again. It might have helped if you'd coloured alternate 3×3 boxes of the sudoku grid in a different colour to help visualise it as you started drawing the filomino lines over it, but that is all that I can suggest to improve on things!
I watch ctc for so long but this is the best. It was little hard to watch because everything was so small but I enjoyed it so much. I hope there will be much more puzzles like this
Just over two hours for me, and I somehow coloured all the tendrils and it just looks magnificent. I sent screenshots to some friends that don't even do Sudokus, just because I feel so accomplished after this solve and it looks so pretty :) Thank you for sharing this.
At 1:07:15 there is a fillomino uniqueness trick one could use to disambiguate the 48 pair. If the 4 goes on top, there are two possible placements of the lonely 1 in column 1 that cannot be disambiguated. If the 8 is on top it forces the placement of the 1 in column 1.
Absolutely amazing, another Stellar puzzle in a week of outstanding puzzles, took me over 2 hours but felt like 30mins as completely absorbed, well done Magnus
That was the most fun, I've had solving a puzzle of any kind. I had the hardest time visually, with the edges of the Sudoku, And ended up having to back out a whole bunch of moves. It took me a considerable amount of time to solve.
57:00 elegantly proving a cell cannot be 4 then immediately marking is as 3 or 4 while not disproving any other numbers giving me heartburn knowing that cell is a 7.
I put in well over an hour on this one and broke ... but I'm not ready to quit; just no time to continue today. Will come back to this one on the weekend ... ... and indeed, I gave this a second shot and was able to finish with an additional time of 48:32 (it helped that I did find the sudoku's location the first time around; my error involved filling in the left side of the grid). What more is there to say; this is simply remarkable. Astounding ... truly astounding.
Honestly this was such a great puzzle! I don't know if I'm getting better at variant sudoku or if this seemed fairly approachable, obviously at the beginning it seemed very daunting but as the video progressed it just seemed more and more like a very fun puzzle.
Yet another astonishingly good puzzle. Brilliantly set and solved. Love the novelty of this ruleset and love the solve path, from the sudoku grid placement to the fillomino bits to the last sudoku bits. We really are on a brilliant run. The length of this video was not a detractor at all, as the pace was still very good, it’s just that there was a lot in the puzzle to be done! Only note: there is an inconsistency in the top left with the line drawing, you left a line through the As!
Amazing puzzle, amazing solve! The standout for me was seeing the 9 in the top left of the sudoku before Simon and swearing black and blue he had broken the puzzle, and then when it worked... Amazement!
At 1:07:00, I think you could disambiguate where the 4 and 8 go because there is one extra square after drawing their fillominos, assuming this puzzle only has one solution. So say the 4 is above the 8. Because the 8 fillomino could either take the top-most set of boxes OR the bottom-most set of boxes, you could then have two solutions, making this puzzle not truly unique. So to avoid that happening, you know that the 8 has to be above the 4. Or am I missing something here?
33:40 - yep, delighted it was the 7s that puts the boxes in that makes the grid. I found that and could see no other way, was hoping to see you find it, and not something easier but less cool.
This introduced me to the "Fillomino" , Had to click it when I saw it had a 9x9 inside of a 16x16. Absolutely amazing puzzle! How they manage to set this is beyond me!
I personally enjoy the longer videos. This is also the only channel I watch on normal speed (all others I watch on 1.75x or 2x speed). The logic and explanations provided in these videos feel very much worth the time. I've even gone back and watched several videos in a row because I was so intrigued.
Very proud of Simon for lining the right edge of r4c1 (of the 9x9 sudoku grid) in the 11th hour. Even in a puzzle as loaded with information as this one, he still manages to clean up nicely.
I've been enjoying your videos for over a year now but only recently have I had the courage to actually start attempting the showcased puzzles myself. I must have been delirious when I decided to give this one a try because who in their right mind decides to attempt a sudoku when you don't even know where the sudoku is 😅. Anyways I'm writing this comment because I DID IT! I managed to finish the puzzle on my own! Learning the various restrictions of where the 9x9 border could and couldn't be was absolutely amazing and I truly enjoyed every moment of this puzzle.
The most brilliant bit of setting was encountered at 50:20. R1C1 can't be a 6 because of the given 6 in R9C1. This forces the line to turn, and puts a 1 into R2C1, opening up work on the whole left side. Of course, while Simon was initially ruminating on the issue, the mouse was actually hovering over the given 6, and I was _willing_ him to see it with all my being. But Simon has such trouble seeing given digits. :) Just like the 3 in box 9 which he didn't notice forever.
hey I'm new to this but i have a question, how does the line stuff work. Like the boundaries for the sudoku grid and the fillomino. So what's the shortcut for it?
It's hard to tell without the distortion but was that every breath you take by the police that you just played if so kudos to you That was very beautiful
It’s a pity that the middle sudoku box wasn’t a magic square - would have been a real puzzle turducken ! A challenge for setters to be sure … A few points to note: 30:45, that orange sudoku grid is impossible due to the earlier logic (there is a 1 in R3C13) 56:38 Should be “3 or SEVEN only”. Well explained solve otherwise. 👍
I discovered this channel about a month ago and wow, some of these puzzles are outstanding! I love this one. Would someone have a recommendation for someone just entering into the advanced sudoku world on a good puzzle or 4 to start with?
1:13:03 How did you conclude in the following segment that "That's a 3 by Sudoku"? From what I can tell at this moment, there was two possible cells in box 6 which could contain 3. Along with four cells in box 3. Was there a trick you used that you did not show/tell or did you luck out on the 50/50?
@@Justaguy19381 Looking at it right now it seems to actually be quite obvious that it have all numbers but 3 looking at it in its row/column. I usually watch these half asleep after work. So I guess I was just too tired to notice at that point.
It seems pretty clear to me that the solution IS, in fact, correct. The software just doesn't recognize the A is equal to 10. Correct me if I am wrong though. Either way, what an astounding puzzle! Very daunting undertaking! Bravo Simon! You never cease to amaze your favorite people!
I don't understand why you worry about the video length so often. I mean, apart from the fact that a lot of people (including me) enjoy the long videos even more, you know that youtube has buttons for pause, fast forward, rewind and even stop, right? 😂
I think it’s because both Simon and Mark have a time limit for puzzles, because of the editing and also because of the fact that they do puzzles every day.
I'm surprised at how smoothly that solved without using the secret. Once you deduce the location of the sudoku grid, if you minimize the sum of its perimeter and account for all the clues that can't possibly reach into the sudoku, you can deduce there are a maximum of 3 more squares that aren't clued by the perimeter. This immediately gets you a couple given clues that must reach into the sudoku and gives a good start on the fillomino.
I'm so impressed with myself for catching that 7 logic faster than you! I can almost never solve these puzzles you feature on your channel so i am actually really proud of myself for spotting that 7 trick
This would have been a great dual solve to have both of you help explain the logic. And it would be nice to see Mark dip his toe into more types of puzzles
51:43... How long can it take to notice that the top left can not connect to 6 because that would put 6 in two spots in the row so it has to continue down which means (1,2) has to be the 1.
A brilliant puzzle again! Thanks for the beautiful movie ;-) Yet one single remark: in terms of colourblindness, most colours within CtC work rather fine nowadays, but filling an entire grid with merely purples and blues is a disaster, for those colours are very close together...
Thank you so much for featuring my puzzle!
Simon, I am always impressed by your ability to so calmly and pedagogically explain every deduction while solving the puzzle for the first time. You really did a masterful job making it all understandable even for viewers unfamiliar with fillominos.
On another note -- In case there is someone who liked this puzzle but thought it was much too easy and that the grid was way too small then you are in luck :). I have another sudoku-fillomino hybrid coming up on logic masters germany in a week or so that should provide quite a lengthy challenge.... :)
Amazing puzzle Magnus. It was great fun. Thanks!
On this puzzle - magnificent! On the upcoming puzzle 😳
This was very fun to watch Simon work through - thank you for sharing it! And I agree, his ability to explain all of his logic is indeed impressive and very helpful.
Beautiful, absolutely wonderful construction this puzzle was from you!! Thank you sharing it with us !!
When he said "eulogize" I thought you died. Glad you're still with us, haha
"I dont know if people will accept this"
Simon you could tell me that the clouds today formed a perfect killer sudoku in the sky and I'd accept it
Ha, isn't that the truth!
Same!
It was so obviously broken and explained well, it was pretty insulting to the intelligence of the viewers.
@@tezcharold While he was explaining it the only logical conclusion you could have come to already was "How many parameter cells do you need at the edge?" So yeah, it kinda was a little bit weird for him to ask if viewers would accept that.
@@tezcharold No, I understand his concern. If you think about his expanation, it was intuative to understand but it wasn't rigorously proven. Its proven enough to be useable, but if it were a mathematical proof, it wouldn't hold up to scrutany.
Consider Simon's personality, and use him proving any Set theory puzzle. He shows it using absolute terms in multiple ways by treating the grid like an algebra equation. Whereas this proof was very "feely."
56:11 "Right, that cannot be 4."
28 seconds later
"It's 3 or 4"
Finally found this comment after a minute of scrolling. Surprised it’s this far down. Totally agree with you. Very funny moment. 😂😂😂
Luckily it only took until 58:02 to notice
I was very yikes at that too 😂
IMO you described the logic on not being able to leave a one-wide strip on an edge perfectly sufficiently to use
Maybe not to that 2 year old child he wished a happy birthday in the beginning, but to most others probably
@@RickyRatte lmao 😂
Agreed
i would say that for myself i intuitively understood and accepted it. however, i'm not sure if it would meet the criteria for a formal logical proof, which is i think what simon was concerned about.
it was of course true, because simon's brain has the most insane knack for intuitively understanding things like that!
@@dwebb2805 the proof I used is that the best case scenario is high digits on the top and bottom of the column and low digits in the middle. Taking the corner digits vertically out, you don't have enough squares to fill in all the low digits.
Ahhh, this Sting guitar intro - such a good song and such a lovely version you played! Also such a lovely occasion - i don’t know the birthday girl Alexis, but I’m sure you’ve made her very happy with that thoughtful gift.
While I’m already commenting: I really appreciate you both on this channel for always taking the time to be kind to viewers, be it through little birthday greetings, your general friendly, polite, and calm conduct on screen, or when taking the time to explain things to new viewers. It’s such a welcoming place to be on the internet that I always want to come back to it even if I have little time in the day. All on top of those very interesting and difficult puzzles of course - that’s what hooked me in ca. 2.5 years ago! - but we all know already that this channel is the home port of great puzzle makers and puzzle solvers alike.
I’m glad you’re here to share the joy of puzzles with us so many years into the channel (and somewhat less years into the pandemic), that you do it in such a friendly and welcoming way, and that so many people have come to participate in the fun in a (for the most part) respectful and kind manner. Thank you for your work and efforts!
Very lovely comment! Totally agree!
Very well expressed - I agree!
Beautifully written about Simon and this entire community!!
What is this song called?
Not sure if this is rigorous enough either, but proof that the sudoku grid can't be within 1-square of the puzzle edge:
Suppose a 9x1 column had a best case arrangement {875312469}, allowing 9 and 8 fillominos to escape freely, 7 and 6 to escape but sealing in a 1x5 region. You're left with 10 squares to populate 5+3+1+2+4 = 15 area worth of fillominos.
Yeah, that's actually the logic I used for this deduction when setting the puzzle :). No matter the arrangement only 4 polyominoes can escape and the remaining five would have a maximum of 10 cells.
I downloaded the app and completed my first ever thermometer sudoku today!
Nice
a family sized ctc is just what i needed to lift my spirits today. hope every one has a happy week!!
You too Leo!
No way you went for this! Super courageous, good show
As many times as Simon has appologized for something that people were "screaming at the screen," I never actually screamed at the screen until today. The 9 in r1c1 had me screaming "Simon, do sudoku! It's a nine! IT'S A NINE!"
Same I felt it today too but with the 2 in r4c9.
The "A"s from the triple 10s are not connected properly to this day... (probably)
What an absolutely stunning puzzle! We've been having a real sudoku feast these last few days. Fantastic solve as always Simon
I first watched Simon's solve. There were a few steps I couldn't have guessed (the 7s), and a few others I noticed before him (the 1s) and shouted at my screen. Once he discovered the location of the sub-sudoku grid, I was so high on joy and excitation I had to give the rest of the puzzle a try by myself. I solved the rest alone in 53min.
I'm a bit sad I didn't solve the entire puzzle by myself, but still very happy I did solve the end!
A big thanks to Simon and Mark for making me discover the "real" sudokus and puzzles. I'm realizing that my level in puzzle solving has so much increased: at first I wasn't able to solve the same sudokus as you, and now I'm able to solve even the hard sudokus (considering the difficulty proportional to the length of the video). So a big THANK YOU!
83 minutes? And I'm out of munchies 😔 Halcyon Days indeed, thanks in large part to our hosts. Deep gratitude to them and to all who tapped their creative source, 81 squares at a time...or more.
Very well said. And I also was out of munchies by the end of that - but what a beauty.
Love that Sven has added a 2001 reference when the software can't give a solution rather than the old style of just highlighting everything red as an error
The line through the A's in the top row... I won't be able to sleep!
😂
1 of the first lengthy videos that i watched all the way thru.
such a masterful puzzle this is and a joy to watch you solve.
me: i'm tired, i'll watch the beginning of the video and then go to sleep and watch the rest tomorrow during breakfast
simon: ...and we'll be back later with another edition of cracking the cryptic
me: no way it's been an hour and a half already
Same
This was by far my favorite video I’ve ever watched on this channel. It literally felt like a treat to watch because it was so incredible :D
What a puzzle!!!! I watched the whole one and half hours in a breeze! This is one of my favourites so far! 👍🏼
Repeating myself here again: brilliant puzzle, brilliant solve! That was a very enjoyable hour, thank you!
Nowadays I don't even expect a video of less than 1-hour in length, I set my schedule to accommodate it and it feels like I have a lot of spare time whenever it's a shorter video... Not complaining about short videos, just pointing out how it fited so smoothly onto my daily routine the long ones that I don't even noticed it...
Incredible puzzle solving and an incredible puzzle; I especially appreciate the de-delinearing at the end!
Simon uses logic not only in Sudoku's but also to explain softwarebugs 34:55. Just brilliant!
41:19 for me. What a fantastic puzzle indeed. It’s absolutely amazing that it is solvable at all, kudos to the setter for creating such a masterpiece.
Impressive! 46 minutes for me. The puzzle maker has promised us a second harder one which he'll release on LMD in the next week. Hopefully Simon does it as well.
WOW, simply genius. I am again speechless as how this type of puzzle can exist and have a unique solution. Amazing setting and really enjoyed your solve Simon. Thanks CTC for my nightly entertainment, look forward to watching every day.
Thank you for your kind words! This puzzle was actually relatively quick and painless to set compared to some others :). If I recall correctly it took around 6-8 hours for the whole process.
@@Khellr0s It blows my mind that something this impressive can be constructed in such a short time. Well done sir.
The birthday callouts are actually the cutest thing ever. They happen every day, but I couldn't imagine how happy I would be if I got that present
I have scrolled through the comments that are here as I am finishing watching this video, and am delighted that they are almost entirely very kind, and more than kind, very highly enthusiastic about this puzzle and the video. Thanks so much, Simon, for a wonderful evening of thinking and understanding. And I am glad that you have begun to note more often when we are granted Knowledge Bombs on CTC - it was a regular thing back when I started watching sometime middle of last year, and (though the KBs have not been fewer) the mention of them has been less often lately. I feel as if I return to my roots here every time you grant a KB and identify it as such!
Always beautifully said and response Emily!!
@@davidrattner9 You are very kind, David.
1:07:10 I came to this point and noticed a sort of meta insight that you could use to define these early:
The number of cells available for the 8 in the 4-8 pair is actually 9 so you would have to place a 1 fillomino to complete it.
If the 8 was below, then the 1 fillomino could go in 2 locations with no restrictions meaning the puzzle would have 2 solutions.
Assuming there is only one solution as we do on this channel then we know that the 8 must be above, albeit through the presumed uniqueness of the puzzle.
Of course it gets filled in for the single solution by sudoku later but I thought it was an interesting notion and I wonder if there's any cheeky puzzle built where meta knowledge about what causes multiple solutions would have to be used
39:04 with a time less than half of this video's length this has to be one of my best times. Usually I would never have attempted a puzzle that is accompanied by such a long video time, but the combination of sudoku and fillomino was really intriguing to me. Great puzzle, great solve, great time :)
This is truly an astounding puzzle. Took me a hair over 2 hours, and every breakthrough was well thought-out and felt so intentional. This is an all time great for me. Thank you for continuing to highlight and share gems like this!
Thank you, I'm really glad you liked it! What you describe is exactly the experience I and other setters aim for when setting puzzles like this.
I wasn't even going to try this when I saw the time. However, I jumped in and it was a lot of fun with some fabulous logic. Great job, Magnus... and Simon!
This is one of the very rare ones where I was a bit quicker with some conclusions and I suddenly feel very powerful. These videos are always so comforting either way, but when I get what‘s going on it‘s even better
Very chuffed to see this here. I was one of the 20 recommenders - this puzzle is stupendously good (and deserves a prize for the name alone). It took me 2 hours - I could not tear myself away - a time I'm happy with in light of Simon's time. That 7 deduction is indeed truly delightful.
Thank you for your kind words and the recommendation :).
Wow. I have never seen such an amazing and creative puzzle. I am impressed.
Thank you very much!
This one was really enjoyable. I found it challenging enough to be engaging, but the logic is straight forward enough that I never felt stuck. It took me a long time, but I was able to keep making steady progress until it was finished. Awesome puzzle!
The puzzle solving people are by far the most wholesome internet community I’ve ever had the pleasure to stumble upon
That was GENIUS. Absolutely ridiculous. Bravo Magnus, and bravo Simon!
Regarding a proof that the sub-grid could not be beside a one-cell strip, it helps to think about the secret: every digit in the sub-grid’s outer columns or rows differ and are part of a valid fillomino and therefore must be able to access 45 cells between them.
Beautiful puzzle! Another of the jaw droppers this week! Nobody has to watch if they don't like the long ones, but personally they're my fave!
i was able to place the grid fairly easily, but i had to keep referring back to the video because i got stuck in the fillomino quite often. brilliant concept, puzzle, and solve! seems tricky at times but there is always a simple logical explanation for every step, and that's what i love about it. thank you for showcasing this one, this channel is helping me to steadily improve.
'Dip their roots into the loam of blue' is a nugget that only Simon is capable of giving us.
87 minutes for me. Very innovative and also enjoyable to solve
The pace of this video is testament to the skill of both Setter and Solver.
Usually if I see 1hr+, I assume it’s going to include long periods of paused solving for Simon to think through the logic and spout off some frustrated bingo phrases (and I still watch regardless).
However, this solve felt pretty consistent in the movement from bit of logic to bit of logic, making for just an incredible flow of solving which made this feel like the shortest 1hr+ video ever on the channel. Cheers to everyone involved.
I am extremely pleased with how cleanly Simon drew the lines in this puzzle. It's often a minor concern of mine with puzzles like these that involve lots of line drawings and coloring that the grid will end up looking rather chaotic. Of course, it's expected that the grid will look chaotic during the solve but I personally love seeing how crisp and clean a fully solved puzzle looks; especially puzzles with a variety of colors and markings.
I am very thankful for his delineation touch ups at 1:21:07 and 1:21:17, they were extremely bothering me the whole time.
It is obviously very important to announce that you are playing God of War. 🤣 Good luck to you, it can be tough (depending on your difficulty settings) and I hope you enjoy every minute of it!
Also, I love the long videos. They're my favorite. I use the videos to help me get to sleep, as the logical process is very relaxing for me, and the longer ones make it easier. That being said, I enjoy all the content from CtC, regardless of the length.
Every Breath You Take was fantastic! I've always found that song super complicated to play but you made it sound so easy
That was amazing! And yes, you did completely prove that the grid couldn't be within 1 cell of the perimeter before doubting yourself and going round again. It might have helped if you'd coloured alternate 3×3 boxes of the sudoku grid in a different colour to help visualise it as you started drawing the filomino lines over it, but that is all that I can suggest to improve on things!
I watch ctc for so long but this is the best. It was little hard to watch because everything was so small but I enjoyed it so much. I hope there will be much more puzzles like this
Just over two hours for me, and I somehow coloured all the tendrils and it just looks magnificent. I sent screenshots to some friends that don't even do Sudokus, just because I feel so accomplished after this solve and it looks so pretty :) Thank you for sharing this.
At 1:07:15 there is a fillomino uniqueness trick one could use to disambiguate the 48 pair. If the 4 goes on top, there are two possible placements of the lonely 1 in column 1 that cannot be disambiguated. If the 8 is on top it forces the placement of the 1 in column 1.
I used that trick in my solve and hated it. Uniqueness arguments always feel like cheating to me.
The puzzle overall was absolutely amazing though
1:13:18 How does sudoku place the 3 in this cell? It looks to me like the 3 could still go into r5c8 (of the sudoku subsection)
Because it cannot be 5, 6 or 9
What an absolutely fantastic puzzle. It's surprisingly approachable too if you're fully comfortable with the rules
So happy you found the missing/discolored lines at the end.
Absolutely amazing, another Stellar puzzle in a week of outstanding puzzles, took me over 2 hours but felt like 30mins as completely absorbed, well done Magnus
That was the most fun, I've had solving a puzzle of any kind. I had the hardest time visually, with the edges of the Sudoku, And ended up having to back out a whole bunch of moves. It took me a considerable amount of time to solve.
57:00 elegantly proving a cell cannot be 4 then immediately marking is as 3 or 4 while not disproving any other numbers giving me heartburn knowing that cell is a 7.
What a beautiful puzzle and a perfect bedtime treat!
Love the guitar intro! What a week for fantastic puzzles and guitar pieces!! Hopefully can watch the live stream Thursday!
So glad you were able to join stream today!! Hope you enjoyed it!!
@@davidrattner9 I did! It was fascinating!
@@longwaytotipperary so glad and fascinating was right!!
@@davidrattner9 really impressed with how humble and down-to-earth he is!
I put in well over an hour on this one and broke ... but I'm not ready to quit; just no time to continue today. Will come back to this one on the weekend ...
... and indeed, I gave this a second shot and was able to finish with an additional time of 48:32 (it helped that I did find the sudoku's location the first time around; my error involved filling in the left side of the grid). What more is there to say; this is simply remarkable.
Astounding ... truly astounding.
Honestly this was such a great puzzle! I don't know if I'm getting better at variant sudoku or if this seemed fairly approachable, obviously at the beginning it seemed very daunting but as the video progressed it just seemed more and more like a very fun puzzle.
Just the pure joy in his voice as he’s about the start the puzzle is so cute
Yet another astonishingly good puzzle. Brilliantly set and solved. Love the novelty of this ruleset and love the solve path, from the sudoku grid placement to the fillomino bits to the last sudoku bits. We really are on a brilliant run. The length of this video was not a detractor at all, as the pace was still very good, it’s just that there was a lot in the puzzle to be done! Only note: there is an inconsistency in the top left with the line drawing, you left a line through the As!
Can't say how glad I am that you found the missing edge as well as the green edge. It would have kept me up at night, knowing...
What a delightful puzzle, loved how the fillomino and sudoku interacted
such a beautiful puzzle! literally, look at this grid! fabiolous!
Normally I am strictly in the "if the video is
Amazing puzzle, amazing solve! The standout for me was seeing the 9 in the top left of the sudoku before Simon and swearing black and blue he had broken the puzzle, and then when it worked... Amazement!
1:21:07 Oh thank god you finally found that! Was bugging me for so long during this awesome solve.
It's the line across the A's that is bothering me!
@@sarahnash7174 Got my hopes up when he fixed the green line and the border at the 5, but alas =/
At 1:07:00, I think you could disambiguate where the 4 and 8 go because there is one extra square after drawing their fillominos, assuming this puzzle only has one solution.
So say the 4 is above the 8. Because the 8 fillomino could either take the top-most set of boxes OR the bottom-most set of boxes, you could then have two solutions, making this puzzle not truly unique. So to avoid that happening, you know that the 8 has to be above the 4.
Or am I missing something here?
33:40 - yep, delighted it was the 7s that puts the boxes in that makes the grid. I found that and could see no other way, was hoping to see you find it, and not something easier but less cool.
The puzzles featured on this channel continue to be amazing, again and again.
This introduced me to the "Fillomino" , Had to click it when I saw it had a 9x9 inside of a 16x16.
Absolutely amazing puzzle! How they manage to set this is beyond me!
I personally enjoy the longer videos. This is also the only channel I watch on normal speed (all others I watch on 1.75x or 2x speed). The logic and explanations provided in these videos feel very much worth the time. I've even gone back and watched several videos in a row because I was so intrigued.
Can someone tell me how Simon could place the 3 by Sudoku at 1:13:15? Couldn't it have gone in r5c8 (in the pink Sudoku) just as well?
Can't take credit for this, stole from another comment, but 3569 are the options and there's 569 in the row, so must be a 3
Simon, that was a great solve, to a great puzzle! Thank you and thank you mr Josefsson
Very proud of Simon for lining the right edge of r4c1 (of the 9x9 sudoku grid) in the 11th hour. Even in a puzzle as loaded with information as this one, he still manages to clean up nicely.
I was bit annoyed by the line in row 1 still...
... except for those 4 "A"s in row one which are still crossed out. But that's just my inner Mr. Monk taking note of even the smallest details. 😇 🤓 😁
I've been enjoying your videos for over a year now but only recently have I had the courage to actually start attempting the showcased puzzles myself. I must have been delirious when I decided to give this one a try because who in their right mind decides to attempt a sudoku when you don't even know where the sudoku is 😅. Anyways I'm writing this comment because I DID IT! I managed to finish the puzzle on my own! Learning the various restrictions of where the 9x9 border could and couldn't be was absolutely amazing and I truly enjoyed every moment of this puzzle.
Wow! Such a beautiful puzzle and beautiful solve by Simon!
This man still entertains me despite the fact that I cannot understand a fifth of what he's doing. Amazing.
Solved in 60 minutes. What a beautiful puzzle.
Fantastic puzzle and solve. i wasn't familiar with filominos before this but this video made me wanna try some out. they seem very fun.
what a tour de force of setting and solving
The most brilliant bit of setting was encountered at 50:20. R1C1 can't be a 6 because of the given 6 in R9C1. This forces the line to turn, and puts a 1 into R2C1, opening up work on the whole left side. Of course, while Simon was initially ruminating on the issue, the mouse was actually hovering over the given 6, and I was _willing_ him to see it with all my being. But Simon has such trouble seeing given digits. :) Just like the 3 in box 9 which he didn't notice forever.
hey I'm new to this but i have a question, how does the line stuff work. Like the boundaries for the sudoku grid and the fillomino. So what's the shortcut for it?
settings -> tools -> enable pen tool
@@keshker3230 thank you
It's hard to tell without the distortion but was that every breath you take by the police that you just played if so kudos to you That was very beautiful
It’s a pity that the middle sudoku box wasn’t a magic square - would have been a real puzzle turducken ! A challenge for setters to be sure … A few points to note: 30:45, that orange sudoku grid is impossible due to the earlier logic (there is a 1 in R3C13) 56:38 Should be “3 or SEVEN only”. Well explained solve otherwise. 👍
I now demand a turducken sudoku!
Wow! Amazing puzzle, and impressive solve!
I discovered this channel about a month ago and wow, some of these puzzles are outstanding! I love this one. Would someone have a recommendation for someone just entering into the advanced sudoku world on a good puzzle or 4 to start with?
1:13:03 How did you conclude in the following segment that "That's a 3 by Sudoku"?
From what I can tell at this moment, there was two possible cells in box 6 which could contain 3. Along with four cells in box 3.
Was there a trick you used that you did not show/tell or did you luck out on the 50/50?
Very late, but it had a 5,6 and 9 looking at it from box 5.
@@Justaguy19381 Looking at it right now it seems to actually be quite obvious that it have all numbers but 3 looking at it in its row/column.
I usually watch these half asleep after work. So I guess I was just too tired to notice at that point.
55:58 😧proves that R8C4 can't be 4, proceeds to mark it up as "34" while saying it can't be 7 🤦♂
*ETA* : didn't take too long to fix 👍
It seems pretty clear to me that the solution IS, in fact, correct. The software just doesn't recognize the A is equal to 10. Correct me if I am wrong though. Either way, what an astounding puzzle! Very daunting undertaking! Bravo Simon! You never cease to amaze your favorite people!
I don't understand why you worry about the video length so often. I mean, apart from the fact that a lot of people (including me) enjoy the long videos even more, you know that youtube has buttons for pause, fast forward, rewind and even stop, right? 😂
Indeed, TH-cam has thought of everything to accommodate any degree of time available for watching CTC videos, hasn't it! 🤣
I think it’s because both Simon and Mark have a time limit for puzzles, because of the editing and also because of the fact that they do puzzles every day.
@@starbies552 ok but then they should apologize to their editing team 😂
@@series161 lol I think they edit themselves
@@starbies552 so they should apologize to themselves 😅
ok sorry but then i didnt unsterstand what you were saying with the time limit for puzzles?
I'm surprised at how smoothly that solved without using the secret. Once you deduce the location of the sudoku grid, if you minimize the sum of its perimeter and account for all the clues that can't possibly reach into the sudoku, you can deduce there are a maximum of 3 more squares that aren't clued by the perimeter. This immediately gets you a couple given clues that must reach into the sudoku and gives a good start on the fillomino.
Can't believe I actually sat through the one thing, it seemed so long and daunting. It turned out very entertaining
thank you so much for fixing all of the little green and black lines, it was very pleasant for my neurodivergent brain
I very much enjoy the way that it looks like the software is screaming about there being a 10 in a sudoku puzzle
Simon: Plays "I'll be watching you"
Us: Yes, yes, very subtle, we'll be watching you Simon, don't worry. LOL
I'm so impressed with myself for catching that 7 logic faster than you!
I can almost never solve these puzzles you feature on your channel so i am actually really proud of myself for spotting that 7 trick
This would have been a great dual solve to have both of you help explain the logic. And it would be nice to see Mark dip his toe into more types of puzzles
51:43... How long can it take to notice that the top left can not connect to 6 because that would put 6 in two spots in the row so it has to continue down which means (1,2) has to be the 1.
A brilliant puzzle again! Thanks for the beautiful movie ;-) Yet one single remark: in terms of colourblindness, most colours within CtC work rather fine nowadays, but filling an entire grid with merely purples and blues is a disaster, for those colours are very close together...
Quite extraordinary - and brilliant. How these compilers produce these works of art is a mystery to me.