Can I just give a shout out to the unsung heroes behind the scenes in the testing team? In order for Simon and Mark to be surprised by these puzzles they're encountering for the first time a lot has to happen with people we don't ever see and I'd like to applaud them, well done testers.
I'm new to these variant sudokus since stumbling upon this channel a few weeks ago. I can usually do the GAS ones, but this is the first one of these that I started at the beginning, paused, and then completely solved myself without following along with the video!
Very early in the solve, once Simon figured out the 8-length line on the bottom left cannot contain a 9 and the other line in row 9 is a 45678 line, that meant that 9 in row 9 can only go in c6. Furthermore, the 456 in box 9 pushed 456 to r7r8c4 with 4 or 5 already in r5r6c4.
He also could have filled in the 5 in r1c5 very early. We know there is definitely a 5 in the 8-cell line at the bottom. It has to go on the line in column 4 because of the 456 triple in r9. We know the 5-cell line at the top has to contain a 5 and it cannot be in r1c4 anymore, and it cannot be in r1c2, r1c3 and r2c5 because of the given 5
Goes to show that it's not the eyesight, as he has new glasses, but something else. My sister dares to suggest that it is deliberate to lenghten the videos.
I was surprised Simon didn't spot the usefulness of the lines in row 9 earlier, he usually loves to attack the rows or columns with that many constraints
Yah the naked 9 was available for a long time. plus the 12 on the bottom since none of 456 in column 4 couldn't go in row 9. which gave you the 5 not being at the top of the grid and so forth.
Hunter E, Yes, I got that [because there was a "3789" quadruple in row8 looking across-- placing the 9s in row7 of box7] , so the 9 in box8 was only in row9 [c7r9 to be exact]. Cool [That "456" triple took out the only remaining 5 on that line in box7 -- so all of the 5s were up col4 on that line -- which placed the "5" in row1 (c5r1). I just happened to be looking at "5s" being three five-cell renbans needed a 5 -- and there was a given "5."] Cool again lol
One more observation that could have been useful in this puzzle is that the sum of 5 consecutive numbers is always divisible by 5. The reason being that one for sure can be divided by 5 an the others must have remainders 1,2,3 and 4. Given that the 5-length lines in this puzzle must also divide in 2, the only possible sums here are 20 and 30.
Nice glasses, Simon! The adjustment period is really something; My husband just got new glasses and for the first week I did a double-take whenever I looked at his face. And I was the one who picked them out for him!
I finally finished one faster than Simon. This is no brag. He explains as he goes along, and this is the first time I've come even close to matching his time.
Well done! I'm still waiting for the day I beat Mark's time. Not to put a dampener on your fine achievement, but these days Simon plods around so much looking for more an more complicated ways to avoid doing simple sudoku logic, or - like today - explaining for 5 minutes what uniqueness is while confusing himself in its explanation. In fact, these days, if I don't beat Simon's time I'm a bit disappointed. And, like you, this is no brag! I'm definitely not getting any faster if I use Mark as the benchmark. I've never beaten his solve time, not even on a GAS puzzle.
Rules: 04:57 Let's Get Cracking: 06:46 Simon's time: 35m16s Puzzle Solved: 42:02 What about this video's Top Tier Simarkisms?! The Secret: 3x (13:26, 13:26, 13:33) Bobbins: 1x (20:49) Three In the Corner: 1x (40:59) Cooking with Gas: 1x (12:03) Diddly Squat: 1x (19:45) You Rotten Thing: 1x (33:12) And how about this video's Simarkisms?! Ah: 11x (15:43, 16:28, 25:43, 25:48, 29:01, 30:33, 30:59, 35:33, 35:33, 35:54, 38:53) Uniqueness: 8x (22:53, 22:59, 23:36, 26:15, 27:04, 27:10, 37:00, 37:15) Lovely: 4x (13:20, 13:20, 30:33, 42:03) Hang On: 4x (01:44, 01:48, 23:49, 24:17) Beautiful: 3x (29:33, 29:36, 36:13) By Sudoku: 3x (36:29, 38:01, 38:55) Unique: 3x (23:04, 23:21, 23:29) Sorry: 2x (11:03, 19:40) The Answer is: 2x (14:26, 16:59) Clever: 2x (35:04, 36:32) Brilliant: 2x (04:10, 04:48) In Fact: 2x (26:08, 40:02) Obviously: 2x (19:08, 23:29) Internal Logic: 2x (22:29, 22:43) Pencil Mark/mark: 2x (17:40, 28:24) What on Earth: 1x (17:49) Naked Single: 1x (32:43) Out of Nowhere: 1x (36:43) I Have no Clue: 1x (01:29) Break the Puzzle: 1x (24:52) Elegant: 1x (40:52) Deadly Pattern: 1x (22:23) Gorgeous: 1x (36:29) Take a Bow: 1x (43:11) Shouting: 1x (02:37) We Can Do Better Than That: 1x (37:49) Plonk: 1x (41:09) Wow: 1x (21:54) Nature: 1x (29:09) Cake!: 1x (03:55) Ab Initio: 1x (08:22) Most popular number(>9), digit and colour this video: Twelve (11 mentions) Four (88 mentions) Green (6 mentions) Antithesis Battles: High (3) - Low (1) Even (13) - Odd (11) Highest (3) - Lowest (0) Row (13) - Column (12) 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!
I loved this puzzle! Finished in just over 50 minutes. Quite happy with how the logic just continued to flow for me and never felt like I had a dull moment trying to find the next bit of pertinent info. Now to watch the video
Once I had got the hints from Simon up to 17:42ish, I found the puzzle mostly collapsed if you realize the 9 should go in r9c5, and that box 8 c4 has a 5 on it (both of which Simon had deduced, then forgot about)
I'm screaming at the screen about the 456 triple in row 9 meaning 456 are in column 4 on the lower 8 cell line. I think my head might explode when he sees it.
Simon missed a few simple deductions early. That one and also missing the 78 pair in column 1. But still, better than I could ever do. So cannot judge too much. 😂
@@cameronwalter Yeah, I usually don't notice anything so I felt rather smug when I spotted it but I didn't see all the stuff he saw about the five cell lines.
In case anyone did not quite follow the explanation at around 11:30 : Imagine you sum up all the numbers along the purple line, you get a sum X. In every box that line visits, that part of the line carries an equal part of the sum. So if the line visits two boxes, each part of the line in their box sums to X/2. (If a line visits 3 boxes, each partial sum would be X/3.) Now, if you divide a number X by 2 and you can't have a fraction (as is the case in Sudoku), the X must be an even number. * As our line in this case is 5 digits long, these 5 digits have to sum to an even number. Because they are all consecutive, you can either have 3 odds and two evens (e.g. 3-4-5-6-7) or 2 odds and 3 evens (e.g. 4-5-6-7-8). But 3 odd digits can never sum to an even digit. You have to have an even number of odd digits. And since you can't have 4 odd digits among 5 consecutive digits, it has to be 2 odd digits. (* You can also look at it the other way around: Both parts of the line some to the same number, let's say Y. Two times the same number is always an even number.)
Well done. Although I already know the concept I felt sorry for anyone new trying to follow Simon's overly complicated explanation. He did much better later on. A good rule of thumb is don't use a complicated or rarely used word when there's a simple, easily understood alternative (and there usually is one!)
Started this puzzle last night, i struggled for 5 min getting the low hanging fruit the 15 min of no/little progress. To late to watch the video went to bed this morning i took up where i left off and the puzzle flowed so beautifully. At the end i almost forgot the equal sums line rule to prevent multiple solutions. :p but knew i was missing something. Lovely puzzle
With line 9 filled in I started working on the two lines that had 36 as a total. I was able to work out how the number sets needed to be. It was a great puzzle and I finished it and then watched your video. Since I had finished it, I saw when you erred. It was a common for me when I see a set of digits and assume something. You worked it out brilliantly. You did a totally different solve. What fun. Gene-
12:18 for me--I flew on this one, but I had already done a different renban/region sum puzzle from the duality pack beforehand, so I already understood how the lines work. I did use uniqueness once, but I see the way I could've used the little 3-cell line to solve the puzzle without it--wish I'd have seen it in the moment, but either way this was a very gratifying puzzle to solve.
So strange that Simon doesn't notice till the puzzle is almost done that r9c6 must be 9 (which he could see around 15:00, once he knows the long line doesn't have a 9 on it). I don't think it helped my solve that much, though!
@@juriaanpeet3173 Me too - but although I ended up with quite a few scattered digits, and a lot more 12 pairs, than Simon it still took colouring the 68s to give the answer. Somehow he seems to have an instinct for which bits to ignore!
This was the first cryptic Sudoku (excluding random Greater Than puzzles) that I actually correctly solved! After running into four or five resets due to bad assumptions or notation errors. In particular, I fumbled with the top L-shaped line for a while because, for whatever reason, I’d somehow convinced myself it had to sum to 15 (before I figured out the easy way to work out the lines).
Actually, at 26:28, a better question (in my opinion) would be "where does 456 go on the log renban?" They can't go in row 9, so they are in column 4 with either a 7 or an 8.
Great setting and solving as usual! Loved the novel ruleset but somehow the highlight for me was some of the more sudoku-y deductions!! Also love seeing you sing and play :) EDIT: way to catch the 3 in the corner!
39:02 for me. Finally beat simon in one of these if we ignore explanation times. Usually i cant break into 30+ minute puzzles and get hints from simon, but im glad i persevered and managed to finish this simon free. I found a much simpler way to get the nature of the column 1 line too - if it was 45678 that would form a 78 pair in row 8 and force 7 and 8 into the same position in box 9, so it had to be 46
43m20s. I greatly appreciated that the double line condition was restrictive without (generally) giving away the identity of all the numbers on the line
25:00 The logic I used to figure out the domino in box 7 was as follows. If the domino was 78, I need to make the three cell line in box 7 total 12 without using 9 (not on the 8 cell line), 8 / 7 (already in the box), or 6 / 5 / 4 (the triple looking at it from box 9). 3 + 2 + 1 doesn't equal 12, so the domino has to be 46. Took me 65:29 to work through, including a point where I made a mistake, worked forward until the puzzle broke, and had to backtrack to find the error and correct it.
Love the new glasses!! Been watching for a few months and i finally got around to comment, I usually listen to Simon on the background, great voice ahah
Very nice guitar intro - and singing! Thank you for that, Simon! And this was a very interesting puzzle, one which I will definitely try soon. (And it whets the appetite for the Duality pack on Patreon tomorrow, as well ...) I am especially glad for a couple of things that occurred at around the 22:00 mark. First, that you explained *why* using uniqueness as a rationale is not what should be done. A puzzle that is already known/proven to be unique can be assumed to be unique (that sounds like a tautology ... maybe it is not exactly what I meant to say, but you understand, right?) but a puzzle that has not been proven to be unique may not have an assumption of uniqueness used to prove that it is unique. And most importantly in what you said, CTC does not solve sudoku on the channel in that way. From time to time I see in the comments to videos or other places (such as discord) that people used uniqueness to get past a sticky spot, and I think that your explanation today should make it clear why you and Mark keep working on the logic of the puzzle to demonstrate and prove why the solution must be this and none other. The other thing that I liked about that few minutes in today's solve was that you went ahead and proved that your assumption that you arrived at because of uniqueness was in fact correct logically - but it was proven correct, not just asserted. In so many ways this was a brilliant solve, not the least of which was that small (or large) point. Thanks, Simon, as always, for making CTC such a fun and instructive place to hang out!
Some day I would like to solve a puzzle that NEEDS uniqueness to be solved. For example, a bunch of clues are question marks, and "if all the question marks were known, then this puzzle has a unique solution; but it wouldn't be unique if any question mark is erased" or something like that.
I actually hit the deadly pattern. I probably should have gone back to see where I went wrong, but I persevered onward until I broke the puzzle -- far later.
6:50 Just at "Let's get cracking." I began the puzzle, and have penciled the longest lines and two shorter lines. I seem to have penciled myself into a deadly pattern -- 46 in rows 7 and 8. I may figure out what I did wrong, but for now... Much later -- I just penciled myself into an impossible position. I'd have to go way back, so I'll restart instead. I missed another way to add to 12, so I'm using that and avoiding the deadly pattern. I bifurcated -- so there. I've finished the puzzle. The math deductions were surprisingly easy. Now, I get to see Simon's solution. 7:40 The algebra for the 321 line is easy: n = (n-1) + 1, and n-1 must be consecutive with 1. Therefore n-1 = 2 and n = 3. 9:00 A five-cell, two-block line must add to an even number. The line must consist of three even numbers and two odd numbers: 23456 or 45678. The line in boxes 8 and 9 can't contain 2. (Figure out why.) So the line is 456 and 78, both adding to 15. 13:30 Whisper a secret to a friend, tell it to the world. 18:00 There are two ways of adding to 12 without 48, and two ways without 57. Two will be barred by the 456 in box 9. I'm not sure how to select between 57 and 48, because I unwittingly bifurcated at my first attempt. 22:20 Not necessarily. That's the deadly pattern I encountered my first attempt. 46 was correct on the five-cell line, but wrong on the eight-cell line.
There's a cuter way of fixing the top left 5 cell line. The box 7 eight cell line has got a 456 on it, but the triple in box 9 places all those digits in column 4 looking at r1c4. If the 5 cell line was 45678, r1c4 would have to be a 456 but it can't be any of those.
i basically went through a bit of proving what could go in each line for length 5 lines, the sum of all digits must be even as it has to be divisible by 2, there are only 2 combinations that satisfy that "2 to 6" (sum 20 so each half is 10 and they can only be arranged by 46-235) and "4 to 8" (sum 30 so each half is 15 and the arrangements are 78-456) and for the length 8 there are only 2 possibilities (1 to 8 (sum 36) or 2 to 9 (sum 44)) but the latter is not divisible by 3 so we must go with 1 to 8 and each part sums 12
@15:35 I think you *can* get that "5" in row1. [That "456" triple in row9 puts the "5" in col4 of that renban] I think that places the "5" you were wondering about. [I just happened to be looking at 5s in the begging] Yes?? [I'm probably out of my mind lol ]
@@stevesebzda570 It's French., except it is pronounced Olivié(r) Nicol so it does not rhymes, which is better I guess, because as a young boy it was not always easy to have a feminine surname :)
15:00 "Now let's think about what that means." Well, for starters. If there's no nine on the line, then it would only be prudent to ask where nine can go. Especially on row 9. Obviously R9C6 is a nine.
I started with a line divided three ways has to be divisible by three and a line cut in half, by two. A line cut in two has to have an even number of odd digits.
You seem to like to joke about this sort of thing so I decided to keep track of it in this puzzle. Granted you absolutely walked me to the doorstep but I got the 6 in box 9 exactly 24 minutes and 17 seconds before you filled it in.
Simon seems to reaaaally hate pencil marks and i feel like it slowed him down this time. What i mean by that is that he mainly doesn‘t seem to like to remove pencil marks in a different square because of a double/triplet/etc (like the 4/5/6 triplet in box9 that forced a 4/5/6 triplet in r4 which would have given him the 5 in r5c1 much easier). It is amazing to see him come up with more difficult logic to solve the problem, but my god it is also painful to watch if you spotted a number earlier because of that.
Having gotten the 1 in boxes 2 and 5, I failed for a long time to realize this meant the 1 in box 7 could not be in the bottom row. Could still progress quite far in the puzzle before finally getting that little bit, but it was a lot more laborious that way.
Could someone help explain a little further how Simon was getting a 1235 quadruple in r1 around video mark 31:28 which lead to r1c1 being a 9? I can’t seem to follow the quadruple and would greatly appreciate any further explanations! Thank you so much.
The best way to start is to do math and pencil mark the lines. It’s pretty approachable once you use the equal sum logic to get the block sum combinations.
Got it in 45:09. This is one I felt intimidated by because I had the lines almost entirely pencil marked about ten minutes in and I felt like I was still so far from the solution.
Clicked the wrong link and ended up working on the Vignettes puzzle. Went back for clues when I got stuck and found out it was the "wrong" puzzle. Stuck it through and got a solve, took me almost an hour and a half though.
How long??? Completed in 15m58s. Equal sum lines with consecutive digits (that must be divisible by three!) - they two eight cell lines are given - they must be 1-8 split into three "twelves"!
Simon, I love watching your videos but you nearly gave me an aneurysm in this one. The 5 in box 2 was able to be placed from the 16 minute mark. When you spotted the location of 5s in column 4 at 37 minutes my head was going to explode because you still didn't place it. Simon, I beg you to slow down and make sure you use all available information from your deductions. You're absolutely brilliant in your logic, but sometimes you get super excited and go too fast. I've noticed this a lot in the last few days of videos and I'm convinced it's the reason for your 2+ hours solve of the wrogn puzzle. For my health and sanity, please take deep breaths. Lol
For those streams ["Sunday night," Simon is saying @2:50] of the 500k puzzles; Do link them in the description. Some of us have had trouble getting onto that 500k puzzle site. [Link what ones you might be solving beforehand -- and you can most probably link a last one(s) after , editing] [No luck getting onto that site, I'll say again] And, Thank You . [[Edit: Play it safe and link MORE BEFOREHAND -- no editing after that way . Thank You, again. Cheers ]]
Simon has the grid awareness of a toddler heading straight for a light pole when it comes to noticing his own pencil marks… it’s really like his brains are saying « taking 5 » after fetching some bulletproof 8D chess logic out of nowhere.
Anyone else wait an entire video for him to put the 9 in row 9? Ugh. Once I see something he doesn’t I can’t unsee it and it refuses to leave my mind, which makes the video hard to enjoy for me. Not that the 9 in row 9 would have done much for the solve but that was the biggest gimme naked single ever.
Roses are red all the day. Violets are blue, so they say. But have you all seen That the eights are all green? And the sevens are orange, okay? (hangs head) I can do better. Duplexity, this one defines: Two functions with less than two signs. For the one becomes two, Not just purple, but blue All the renbans are equal sum lines.
Does anyone else often spend half an hour working out a puzzle only to reach a dead end and realise they made a crucial miscalculation at the very beginning
I have done this a couple of times. I usually watch the video and hit ‘undo’ on my puzzle until I reach the error. Then I pause the video and attempt the puzzle again.
Can I just give a shout out to the unsung heroes behind the scenes in the testing team? In order for Simon and Mark to be surprised by these puzzles they're encountering for the first time a lot has to happen with people we don't ever see and I'd like to applaud them, well done testers.
At some point I just want a full video of Simon performing a song. That would be neat
Seconded
@@sarahnash7174 sixty foured
@@nemuchan 😁
@@sarahnash7174 yes,
I fear there would be a lot of requests if Simon started that as a trend. Maybe to make it cryptic, he could sing it in Morse code lol
I'm new to these variant sudokus since stumbling upon this channel a few weeks ago. I can usually do the GAS ones, but this is the first one of these that I started at the beginning, paused, and then completely solved myself without following along with the video!
Very early in the solve, once Simon figured out the 8-length line on the bottom left cannot contain a 9 and the other line in row 9 is a 45678 line, that meant that 9 in row 9 can only go in c6. Furthermore, the 456 in box 9 pushed 456 to r7r8c4 with 4 or 5 already in r5r6c4.
I found it so frustrating that Simon never saw that. It could have saved him over 10 minutes I reckon.
He also could have filled in the 5 in r1c5 very early. We know there is definitely a 5 in the 8-cell line at the bottom. It has to go on the line in column 4 because of the 456 triple in r9. We know the 5-cell line at the top has to contain a 5 and it cannot be in r1c4 anymore, and it cannot be in r1c2, r1c3 and r2c5 because of the given 5
Goes to show that it's not the eyesight, as he has new glasses, but something else. My sister dares to suggest that it is deliberate to lenghten the videos.
I was surprised Simon didn't spot the usefulness of the lines in row 9 earlier, he usually loves to attack the rows or columns with that many constraints
Yes. I was screaming about this
He could've gotten the 5 in box two right at the start.
Yah the naked 9 was available for a long time. plus the 12 on the bottom since none of 456 in column 4 couldn't go in row 9. which gave you the 5 not being at the top of the grid and so forth.
Instead he goes with coloring the sevens and eights.
He hardly ever goes as low as row 9 for anything... he needs a more ergonomic workplace, I'm sure.
14:30 A digit was available here - if 9 can't be on the 8-length renban or the 5-length renban, you're only left with one place for it in row 9...
Hunter E,
Yes, I got that [because there was a "3789" quadruple in row8 looking across-- placing the 9s in row7 of box7] , so the 9 in box8 was only in row9 [c7r9 to be exact].
Cool
[That "456" triple took out the only remaining 5 on that line in box7 -- so all of the 5s were up col4 on that line -- which placed the "5" in row1 (c5r1). I just happened to be looking at "5s" being three five-cell renbans needed a 5 -- and there was a given "5."]
Cool again lol
But Simon is not interested in these trivious reasonings :)
One more observation that could have been useful in this puzzle is that the sum of 5 consecutive numbers is always divisible by 5. The reason being that one for sure can be divided by 5 an the others must have remainders 1,2,3 and 4.
Given that the 5-length lines in this puzzle must also divide in 2, the only possible sums here are 20 and 30.
Nice glasses, Simon! The adjustment period is really something; My husband just got new glasses and for the first week I did a double-take whenever I looked at his face. And I was the one who picked them out for him!
I finally finished one faster than Simon. This is no brag. He explains as he goes along, and this is the first time I've come even close to matching his time.
I believe I had beaten Simon a few times, but this is definitely the first time I had beaten him by a decent amount: 9 minute 14 second difference.
Well done! I'm still waiting for the day I beat Mark's time. Not to put a dampener on your fine achievement, but these days Simon plods around so much looking for more an more complicated ways to avoid doing simple sudoku logic, or - like today - explaining for 5 minutes what uniqueness is while confusing himself in its explanation. In fact, these days, if I don't beat Simon's time I'm a bit disappointed. And, like you, this is no brag! I'm definitely not getting any faster if I use Mark as the benchmark. I've never beaten his solve time, not even on a GAS puzzle.
Same; I beat him by over 20 minutes. But, if he wasn't so allergic to pencil marking the bottom left renban, he probably would have beat us all.
I always love it when the puzzle breaks down like this in the end. Of course, I love the alternative too.
In answer to the opening tune... yes, we'll all still love you
Yes
I am glad you don't shortcut with uniqueness, making us learn more about the puzzles with the 'detour'.
Rules: 04:57
Let's Get Cracking: 06:46
Simon's time: 35m16s
Puzzle Solved: 42:02
What about this video's Top Tier Simarkisms?!
The Secret: 3x (13:26, 13:26, 13:33)
Bobbins: 1x (20:49)
Three In the Corner: 1x (40:59)
Cooking with Gas: 1x (12:03)
Diddly Squat: 1x (19:45)
You Rotten Thing: 1x (33:12)
And how about this video's Simarkisms?!
Ah: 11x (15:43, 16:28, 25:43, 25:48, 29:01, 30:33, 30:59, 35:33, 35:33, 35:54, 38:53)
Uniqueness: 8x (22:53, 22:59, 23:36, 26:15, 27:04, 27:10, 37:00, 37:15)
Lovely: 4x (13:20, 13:20, 30:33, 42:03)
Hang On: 4x (01:44, 01:48, 23:49, 24:17)
Beautiful: 3x (29:33, 29:36, 36:13)
By Sudoku: 3x (36:29, 38:01, 38:55)
Unique: 3x (23:04, 23:21, 23:29)
Sorry: 2x (11:03, 19:40)
The Answer is: 2x (14:26, 16:59)
Clever: 2x (35:04, 36:32)
Brilliant: 2x (04:10, 04:48)
In Fact: 2x (26:08, 40:02)
Obviously: 2x (19:08, 23:29)
Internal Logic: 2x (22:29, 22:43)
Pencil Mark/mark: 2x (17:40, 28:24)
What on Earth: 1x (17:49)
Naked Single: 1x (32:43)
Out of Nowhere: 1x (36:43)
I Have no Clue: 1x (01:29)
Break the Puzzle: 1x (24:52)
Elegant: 1x (40:52)
Deadly Pattern: 1x (22:23)
Gorgeous: 1x (36:29)
Take a Bow: 1x (43:11)
Shouting: 1x (02:37)
We Can Do Better Than That: 1x (37:49)
Plonk: 1x (41:09)
Wow: 1x (21:54)
Nature: 1x (29:09)
Cake!: 1x (03:55)
Ab Initio: 1x (08:22)
Most popular number(>9), digit and colour this video:
Twelve (11 mentions)
Four (88 mentions)
Green (6 mentions)
Antithesis Battles:
High (3) - Low (1)
Even (13) - Odd (11)
Highest (3) - Lowest (0)
Row (13) - Column (12)
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!
Petition to add "Bilbo Bobbins" to Simarkisms...
My solve time was 29:12, first time I’ve ever came close to beating Simon!
you simply have too much time on your hands 🤣
Thanks for the birthday wish!
Happy birthday
🎂
I loved this puzzle! Finished in just over 50 minutes. Quite happy with how the logic just continued to flow for me and never felt like I had a dull moment trying to find the next bit of pertinent info. Now to watch the video
Once I had got the hints from Simon up to 17:42ish, I found the puzzle mostly collapsed if you realize the 9 should go in r9c5, and that box 8 c4 has a 5 on it (both of which Simon had deduced, then forgot about)
I'm screaming at the screen about the 456 triple in row 9 meaning 456 are in column 4 on the lower 8 cell line. I think my head might explode when he sees it.
I feel the same about the 9 in row 9
Simon missed a few simple deductions early. That one and also missing the 78 pair in column 1. But still, better than I could ever do. So cannot judge too much. 😂
@@cameronwalter Yeah, I usually don't notice anything so I felt rather smug when I spotted it but I didn't see all the stuff he saw about the five cell lines.
In case anyone did not quite follow the explanation at around 11:30 :
Imagine you sum up all the numbers along the purple line, you get a sum X. In every box that line visits, that part of the line carries an equal part of the sum.
So if the line visits two boxes, each part of the line in their box sums to X/2. (If a line visits 3 boxes, each partial sum would be X/3.)
Now, if you divide a number X by 2 and you can't have a fraction (as is the case in Sudoku), the X must be an even number. *
As our line in this case is 5 digits long, these 5 digits have to sum to an even number. Because they are all consecutive, you can either have 3 odds and two evens (e.g. 3-4-5-6-7) or 2 odds and 3 evens (e.g. 4-5-6-7-8).
But 3 odd digits can never sum to an even digit. You have to have an even number of odd digits. And since you can't have 4 odd digits among 5 consecutive digits, it has to be 2 odd digits.
(* You can also look at it the other way around: Both parts of the line some to the same number, let's say Y. Two times the same number is always an even number.)
Well done. Although I already know the concept I felt sorry for anyone new trying to follow Simon's overly complicated explanation. He did much better later on. A good rule of thumb is don't use a complicated or rarely used word when there's a simple, easily understood alternative (and there usually is one!)
Thanks to the setter James Kopp. A neat puzzle with the right level of difficulty for me. Never got stuck but was just challenged enough.
CTC and the Beatles? What a lovely start of the weekend
Started this puzzle last night, i struggled for 5 min getting the low hanging fruit the 15 min of no/little progress. To late to watch the video went to bed this morning i took up where i left off and the puzzle flowed so beautifully. At the end i almost forgot the equal sums line rule to prevent multiple solutions. :p but knew i was missing something. Lovely puzzle
23min 40 for me. Really enjoyed the maths on this puzzle. I got off to a fast start with noticing the 5 cell lines needed 3 evens to work out.
With line 9 filled in I started working on the two lines that had 36 as a total. I was able to work out how the number sets needed to be. It was a great puzzle and I finished it and then watched your video. Since I had finished it, I saw when you erred. It was a common for me when I see a set of digits and assume something. You worked it out brilliantly. You did a totally different solve. What fun.
Gene-
33 minutes solve. Very interesting puzzle, fairly doable.
12:18 for me--I flew on this one, but I had already done a different renban/region sum puzzle from the duality pack beforehand, so I already understood how the lines work. I did use uniqueness once, but I see the way I could've used the little 3-cell line to solve the puzzle without it--wish I'd have seen it in the moment, but either way this was a very gratifying puzzle to solve.
Very beautiful puzzle. I enjoyed it so much.
So strange that Simon doesn't notice till the puzzle is almost done that r9c6 must be 9 (which he could see around 15:00, once he knows the long line doesn't have a 9 on it). I don't think it helped my solve that much, though!
Yeah that was the first digit I got as well
@@juriaanpeet3173 Me too - but although I ended up with quite a few scattered digits, and a lot more 12 pairs, than Simon it still took colouring the 68s to give the answer. Somehow he seems to have an instinct for which bits to ignore!
A few days late, but I liked the intro. My dad turned 64 this year so I sent him some of this myself (sans singing.) Classic tune.
This was the first cryptic Sudoku (excluding random Greater Than puzzles) that I actually correctly solved! After running into four or five resets due to bad assumptions or notation errors. In particular, I fumbled with the top L-shaped line for a while because, for whatever reason, I’d somehow convinced myself it had to sum to 15 (before I figured out the easy way to work out the lines).
I love it when Simon sings the intro!
This was my first equal sums variation but I enjoyed figuring out the logic.
For the line at 9:14, it makes more sense to start with: The sum is at least 3+4+5=12. So there can't be a 2 on the line, and also no 1.
Actually, at 26:28, a better question (in my opinion) would be "where does 456 go on the log renban?"
They can't go in row 9, so they are in column 4 with either a 7 or an 8.
Great setting and solving as usual! Loved the novel ruleset but somehow the highlight for me was some of the more sudoku-y deductions!! Also love seeing you sing and play :)
EDIT: way to catch the 3 in the corner!
A super hungover 57:04 time. Took a while to break in, really impressed how everything tied together in the end.
Happy birthday, Joe! Thanks for giving us the opportunity to hear a bit of Beatles.
39:02 for me. Finally beat simon in one of these if we ignore explanation times. Usually i cant break into 30+ minute puzzles and get hints from simon, but im glad i persevered and managed to finish this simon free.
I found a much simpler way to get the nature of the column 1 line too - if it was 45678 that would form a 78 pair in row 8 and force 7 and 8 into the same position in box 9, so it had to be 46
Extremely cool puzzle and nice, concise solve.
43m20s. I greatly appreciated that the double line condition was restrictive without (generally) giving away the identity of all the numbers on the line
25:00 The logic I used to figure out the domino in box 7 was as follows. If the domino was 78, I need to make the three cell line in box 7 total 12 without using 9 (not on the 8 cell line), 8 / 7 (already in the box), or 6 / 5 / 4 (the triple looking at it from box 9). 3 + 2 + 1 doesn't equal 12, so the domino has to be 46.
Took me 65:29 to work through, including a point where I made a mistake, worked forward until the puzzle broke, and had to backtrack to find the error and correct it.
25:42 ... I made a small error but was able to spot it and complete the sudoku without too much delay.
Nice puzzle!
15:02 for me. at some point i had every renban pencilmarked, but in order, just a bit of coloring and then solved.
Love the new glasses!! Been watching for a few months and i finally got around to comment, I usually listen to Simon on the background, great voice ahah
Yeah me!! 1st one I did all by my big girl self!! Yipee!!! No need for coloring. But I do you paper and pencil as worksheets!
Very nice guitar intro - and singing! Thank you for that, Simon! And this was a very interesting puzzle, one which I will definitely try soon. (And it whets the appetite for the Duality pack on Patreon tomorrow, as well ...) I am especially glad for a couple of things that occurred at around the 22:00 mark. First, that you explained *why* using uniqueness as a rationale is not what should be done. A puzzle that is already known/proven to be unique can be assumed to be unique (that sounds like a tautology ... maybe it is not exactly what I meant to say, but you understand, right?) but a puzzle that has not been proven to be unique may not have an assumption of uniqueness used to prove that it is unique. And most importantly in what you said, CTC does not solve sudoku on the channel in that way. From time to time I see in the comments to videos or other places (such as discord) that people used uniqueness to get past a sticky spot, and I think that your explanation today should make it clear why you and Mark keep working on the logic of the puzzle to demonstrate and prove why the solution must be this and none other. The other thing that I liked about that few minutes in today's solve was that you went ahead and proved that your assumption that you arrived at because of uniqueness was in fact correct logically - but it was proven correct, not just asserted. In so many ways this was a brilliant solve, not the least of which was that small (or large) point. Thanks, Simon, as always, for making CTC such a fun and instructive place to hang out!
Some day I would like to solve a puzzle that NEEDS uniqueness to be solved. For example, a bunch of clues are question marks, and "if all the question marks were known, then this puzzle has a unique solution; but it wouldn't be unique if any question mark is erased" or something like that.
I actually hit the deadly pattern. I probably should have gone back to see where I went wrong, but I persevered onward until I broke the puzzle -- far later.
Really nice puzzle. Thank you !
I solved it in 42:38. One of my goals was to be faster than the length of a video (when the video is over 30 min.) mission complete!
6:50 Just at "Let's get cracking." I began the puzzle, and have penciled the longest lines and two shorter lines. I seem to have penciled myself into a deadly pattern -- 46 in rows 7 and 8. I may figure out what I did wrong, but for now... Much later -- I just penciled myself into an impossible position. I'd have to go way back, so I'll restart instead.
I missed another way to add to 12, so I'm using that and avoiding the deadly pattern. I bifurcated -- so there.
I've finished the puzzle. The math deductions were surprisingly easy. Now, I get to see Simon's solution.
7:40 The algebra for the 321 line is easy: n = (n-1) + 1, and n-1 must be consecutive with 1. Therefore n-1 = 2 and n = 3.
9:00 A five-cell, two-block line must add to an even number. The line must consist of three even numbers and two odd numbers: 23456 or 45678. The line in boxes 8 and 9 can't contain 2. (Figure out why.) So the line is 456 and 78, both adding to 15.
13:30 Whisper a secret to a friend, tell it to the world.
18:00 There are two ways of adding to 12 without 48, and two ways without 57. Two will be barred by the 456 in box 9. I'm not sure how to select between 57 and 48, because I unwittingly bifurcated at my first attempt.
22:20 Not necessarily. That's the deadly pattern I encountered my first attempt. 46 was correct on the five-cell line, but wrong on the eight-cell line.
There's a cuter way of fixing the top left 5 cell line. The box 7 eight cell line has got a 456 on it, but the triple in box 9 places all those digits in column 4 looking at r1c4. If the 5 cell line was 45678, r1c4 would have to be a 456 but it can't be any of those.
Interesting puzzle not over difficult but fun
i basically went through a bit of proving what could go in each line
for length 5 lines, the sum of all digits must be even as it has to be divisible by 2, there are only 2 combinations that satisfy that
"2 to 6" (sum 20 so each half is 10 and they can only be arranged by 46-235) and "4 to 8" (sum 30 so each half is 15 and the arrangements are 78-456)
and for the length 8 there are only 2 possibilities (1 to 8 (sum 36) or 2 to 9 (sum 44)) but the latter is not divisible by 3 so we must go with 1 to 8 and each part sums 12
@15:35
I think you *can* get that "5" in row1.
[That "456" triple in row9 puts the "5" in col4 of that renban]
I think that places the "5" you were wondering about.
[I just happened to be looking at 5s in the begging]
Yes??
[I'm probably out of my mind lol ]
And I think you are right.
@@olivier2553 lol
Oh, about me being out of my mind?! Lol
Yes, I'm out of my mind, alright lol
😂😎☕️
@@olivier2553
I just realized your name rhymes
[Olivié(r) Nicolé phonetically]
Is that French or Italian? Lol
@@stevesebzda570 It's French., except it is pronounced Olivié(r) Nicol so it does not rhymes, which is better I guess, because as a young boy it was not always easy to have a feminine surname :)
15:00 "Now let's think about what that means."
Well, for starters. If there's no nine on the line, then it would only be prudent to ask where nine can go.
Especially on row 9.
Obviously R9C6 is a nine.
I started with a line divided three ways has to be divisible by three and a line cut in half, by two. A line cut in two has to have an even number of odd digits.
It warms my heart to hear you say I'm one of your favourite people :D
You don't look 64, clearly you had an easy paperound. Elegant solution to this one. enjoyed the view. 👍
I can't wait for someone to make a video that forces Simon to use uniqueness to solve. Its a tricky line for sure but I think it would be cool
It's already been done.
Kill Them With Uniqueness, by AFrayedKnot
ruclips.net/video/qJliK881Leo/видео.html
You seem to like to joke about this sort of thing so I decided to keep track of it in this puzzle.
Granted you absolutely walked me to the doorstep but I got the 6 in box 9 exactly 24 minutes and 17 seconds before you filled it in.
Thank you so much for the birthday wishes, that was a bit of a surprise! Jo
12:36 for me. Great puzzle!!
Simon seems to reaaaally hate pencil marks and i feel like it slowed him down this time.
What i mean by that is that he mainly doesn‘t seem to like to remove pencil marks in a different square because of a double/triplet/etc (like the 4/5/6 triplet in box9 that forced a 4/5/6 triplet in r4 which would have given him the 5 in r5c1 much easier).
It is amazing to see him come up with more difficult logic to solve the problem, but my god it is also painful to watch if you spotted a number earlier because of that.
Having gotten the 1 in boxes 2 and 5, I failed for a long time to realize this meant the 1 in box 7 could not be in the bottom row. Could still progress quite far in the puzzle before finally getting that little bit, but it was a lot more laborious that way.
Could someone help explain a little further how Simon was getting a 1235 quadruple in r1 around video mark 31:28 which lead to r1c1 being a 9? I can’t seem to follow the quadruple and would greatly appreciate any further explanations! Thank you so much.
How do you come up with these video names?
"Mozart's Sandwich Sudoku", "Broken Windoku", ...
And the glasses thing is relatable
The best way to start is to do math and pencil mark the lines.
It’s pretty approachable once you use the equal sum logic to get the block sum combinations.
"Mark would pencil mark that but I'm not going to. Na na na na na"
I swear they're children 🤣
I had to stop the video to laugh
Got it in 45:09. This is one I felt intimidated by because I had the lines almost entirely pencil marked about ten minutes in and I felt like I was still so far from the solution.
Clicked the wrong link and ended up working on the Vignettes puzzle. Went back for clues when I got stuck and found out it was the "wrong" puzzle. Stuck it through and got a solve, took me almost an hour and a half though.
❤ Beatles intro 😍
Got to love all of Simon's guitar intros, especially Beatles tunes!!!
@@davidrattner9 And singing!!
@@davidrattner9 yes! 😊
@@emilywilliams3237 yes! 😊
Smooth 33 minute solve
46:20 for me. Okay, not too far off the video length. I wound up using 4 colors, but 2 of those colors were only used twice.
36:31 And from there, the entire Sudoku just collapsed in on itself. So it ended faster than I had expected.
I was delighted when it seemed like I found the a way in relatively quickly... and then it turns out I made a mistake.
At about 41:10 Simon hopes he's not making "too many rickets".
What precisely, in this context, is a "ricket" and where did this term derive from?
At 15:34 he misses that Box 9 row 9 has s 456 triple that forces the 456 to be in col 4 of the 12 sums and that places the 5 in row 1
Oh, this comment from montage. I believe Simon will add more in the future
How long??? Completed in 15m58s. Equal sum lines with consecutive digits (that must be divisible by three!) - they two eight cell lines are given - they must be 1-8 split into three "twelves"!
24:07 for me! Quite fun to play.
BILBO BOBBINS??!!
Simon, I love watching your videos but you nearly gave me an aneurysm in this one. The 5 in box 2 was able to be placed from the 16 minute mark. When you spotted the location of 5s in column 4 at 37 minutes my head was going to explode because you still didn't place it. Simon, I beg you to slow down and make sure you use all available information from your deductions. You're absolutely brilliant in your logic, but sometimes you get super excited and go too fast. I've noticed this a lot in the last few days of videos and I'm convinced it's the reason for your 2+ hours solve of the wrogn puzzle. For my health and sanity, please take deep breaths. Lol
Grazzi għall-isforz kollu tiegħek mal-kontenut. Żomm ix-xogħol it-tajjeb.
Nuh, Nuh, nuh-nuh, nuh! Made me laugh out loud
One thing that annoys me is when Simon says “that doesn’t do anything” when he’s just filled in a digit. Of course it does!
For those streams ["Sunday night," Simon is saying @2:50] of the 500k puzzles;
Do link them in the description.
Some of us have had trouble getting onto that 500k puzzle site.
[Link what ones you might be solving beforehand -- and you can most probably link a last one(s) after , editing]
[No luck getting onto that site, I'll say again]
And, Thank You .
[[Edit: Play it safe and link MORE BEFOREHAND -- no editing after that way .
Thank You, again.
Cheers ]]
35:26 for me. I’m happy with that! :-D
I'd love to hear you open a video with The Scientist, the Willie Nelson version
Finish in 27:50.
Simon has the grid awareness of a toddler heading straight for a light pole when it comes to noticing his own pencil marks… it’s really like his brains are saying « taking 5 » after fetching some bulletproof 8D chess logic out of nowhere.
35:45 for me, but I decided the triple in r789c4 using uniqueness 🤭
Has any setter tried a „assume this Sudoku has a unique solution“ rule before?
Just saw Simon without glasses. I'm a bit disturbed now. 😏
74:22 for me
Damn the 78 pair
Anyone else wait an entire video for him to put the 9 in row 9? Ugh. Once I see something he doesn’t I can’t unsee it and it refuses to leave my mind, which makes the video hard to enjoy for me.
Not that the 9 in row 9 would have done much for the solve but that was the biggest gimme naked single ever.
The first digit I put in the grid Simon didn't fill in until 40 minutes
30:50... now i can go party:)
Roses are red all the day.
Violets are blue, so they say.
But have you all seen
That the eights are all green?
And the sevens are orange, okay?
(hangs head) I can do better.
Duplexity, this one defines:
Two functions with less than two signs.
For the one becomes two,
Not just purple, but blue
All the renbans are equal sum lines.
Just want to let you know that you have favorite poeple in Mauritania
At the 12 minute mark, why would 13 not work ? 6 and 7 in box 8 and 3,4,5 in box 9?
Because 3,4,5 adds to 12, not 13 :)
Simon without glasses is a very odd sight.
The 5 in 7 would have done it as well.
Does anyone else often spend half an hour working out a puzzle only to reach a dead end and realise they made a crucial miscalculation at the very beginning
I have done this a couple of times. I usually watch the video and hit ‘undo’ on my puzzle until I reach the error. Then I pause the video and attempt the puzzle again.