The Jellyfish Sudoku Pattern & App News
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- เผยแพร่เมื่อ 20 ก.ย. 2024
- You can try this incredible puzzle from Sam Cappleman-Lynes here:
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▶ABOUT US◀
Hi! We're Simon Anthony and Mark Goodliffe, two of the UK's most enthusiastic puzzle solvers. We have both represented the UK at the World Sudoku Championships and the World Puzzle Championships. We're also "cryptic crossword" aficionados. Mark is the eleven-time winner of The Times championship and Simon is the former record holder for most consecutive correct solutions to The Listener crossword. We hope we can help your puzzle solving while also introducing you to some of the world's best puzzles.
Thank you for watching!
Simon and Mark
![[Extreme] A Sudoku With A Sting In The Start!](http://i.ytimg.com/vi/lPpAtnbvVR8/mqdefault.jpg)
![[Extreme] A Sudoku With A Sting In The Start!](/img/tr.png)
EDIT: Oh my goodness, a classic Sudoku app from Mark and Simon. I'M ECSTATIC! I've loved the Sandwich Sudoku app so much, and I'm beyond excited to purchase this as soon as it is live on iOS.
I would have absolutely never gotten this without the title telling me what to look for. Extremely difficult to spot, even when you know exactly what it is, and then it still becomes difficult to figure out exactly what to do with it all. Took me 29 minutes to solve in total, but again, without the title specifically telling me to look for a Jellyfish I'd have easily been in "I give up" territory. Well done to Sam!
Before I found your channel, I never thought I would have such a strong (positive) reaction at a sudoku puzzle. Your enthusiasm about sudoku and other puzzles really shows and it's very captivating. It really thought me to appreaciate those things (and that appreciation translates to other things in my life). Thank you.
Incredibly, the jellyfish is *all* you need to crack this open. Once you've got that, it all becomes incredibly easy.
@Fester Blats Seeing the jellyfish(es) isn't easy.
The fact that jellyfish are Phistomefel rings is such a huge revelation!!! I solved this puzzle in 30 min using the ring and it was straight forward. I couldn't believe it.
Playing catch-up on old puzzles while practicing various fish. I wonder if anyone else cut straight to Phistomefel's theorem after doing the jellyfish, even though the puzzle is straightforward from that point. You find that three 1s and a 2 must be placed in the corners, along with a few other givens, and the 789 need to go into the ring. Comparing what's left eliminates candidates from several cells and speeds the process.
wouldnt have been able to solve this puzzle on my own in a million years! incredibly difficult and genius way of approaching the problem. Congrats to your brain ;)
I second that. I can understand the explanation, but, on my own...not a chance in Hell.
I see a few comments on this video claiming that without previously knowing the Jellyfish pattern, the puzzle is not approachable. I don't think that is the case, and such a statement is usually a result of someone having an overly-rigid approach to Sudoku, where they only use certain techniques or strategies and aren't open to creative thinking. Puzzling in general, and Sudoku in particular, are fundamentally creative pursuits!
This puzzle was designed with the intention that even someone who didn't know the Jellyfish pattern would be able to work out the first steps - although I am not claiming it is easy! The 4x4 arrangement of 1-6 is front and centre, hoping to draw your attention to it. The solitary 7, 8 and 9 are position carefully in symmetrical locations around the edge, as a way to indicate their importance. Considering those digits in conjunction with the large 1-6 block will lead you in the right direction, even if you have not previously seen a Jellyfish pattern.
I would usually not consider a Jellyfish as a fair technique for a setter to put before a solver. But this is not just a random Jellyfish, which appears without warning in a location you would have no reason to consider. These creatures have been very carefully placed at a specific location in a way which means the clues are all designed to lead you towards it.
What's more, it _must_ be found at the very beginning of the solve, and having been found I reward the solver's ingenuity with a puzzle that resolves itself very easily after that point. It would be unfair if after the high experienced by cracking the initial arrangement, the solver is brought down to earth again with yet more grinding, difficult progress. That's not the point at all - as Simon says, puzzling is about a conversation between the setter and the solver.
Thanks for the insights, and the wonderful puzzle. If Simon and Mark were looking for new content suggestions I'd love to see interviews with setters such as yourself exploring the process of creating these logic puzzles. I can imagine an algorithmic approach to creating a sudoku with a unique solution but I'm really intrigued at the notion of an intended path for the solver to discover, and how you plan and realise that while creating a puzzle.
I agree with the idea that, if you can't spot the jellyfish, the puzzle is basically unapproachable (technically it's solvable, but you have to use a bunch of stuff that no reasonable solver would ever think of to even get started) but, as you mentioned, that's kinda the point.
By making the Jellyfish required at the beginning of the puzzle, you force the solver to consider what the setter had planned. The overall symmetry and design of the puzzle further push the solver towards some type of fish technique. Even if you've never heard of a swordfish or jellyfish by name, if you're attempting a puzzle like this (knowing it's difficult) you should by vaguely aware of the idea that an x-wing type situation could extend beyond 2 rows/columns.
Maybe that's enough for you to solve it without explicit knowledge of the jellyfish pattern, maybe it isn't. Either way, I think it's totally fine for a puzzle to be essentially unsolvable if you miss the trick the setter built into it, whether that's due to simply missing it or not being aware of it as a concept.
Well, it is definitely not the case because I started watching this channel about 2 months ago and was knew to Sudoku, but intrigued and started trying them before watching each video. I'd go until I got stuck and then watch and see some amazing insight that got Simon unstuck at the same point in the puzzle I was at. I didn't even know what a jellyfish is in Sudoku, but tried as usual and this just happens to be the first one I've solved completely without referring to the video at any point. I did need to use an X-wing on 4's near the beginning and an X-wing on 6's near the end, but unless I saw and used a jellyfish without knowing it (highly unlikely), you don't need one. Sometimes I think he just goes with whatever is on hand to make progress.
I used a bunch of bifurcation to eliminate digits, found like a dozen pairs, eventually managed to use a Y after looking repeatedly each step. Finished in 4 hours 14 minutes. Guess I can finally add jellyfish to my things to look for.
There are also jellyfish on 7, 8, and 9 in the columns (because of the symmetry).
I saw the same thing as I was solving on the web app. I wonder why Simon never noticed it.
Yeah, thanks to the video title I was looking for jellyfish straight away and very quickly found all 6 of them, coloured all the cells which could not be 7, 8, or 9, and then was able to solve the puzzle without using any advanced logic.
@@72DerekB Except that the jellyfish is advanced logic! But, yeah I get your point.
A brilliant display of analysis: you filled in that first square without using a single stroke of notation. Clever proofs are a delight to behold. And this is certainly one of the cleverest in sudoku.
Great news! Sandwich sudoku is a great app! I will be first in line :-)
this video had the best audio yet
I understand the logic behind these patterns just fine but SPOTTING them is on a whole other level.
Right at 6:16 I paused and went OMG in my mind. I figured out what you were about to explain. This was cool. I've never heard of this until now.
I’m anxiously waiting for your classic sudoku app!!!
I used the presence of a 7,8 and 9 in the outer squares together with the lack of these numbers in the middle 5x5 to deduce that the outer corner 2x2 squares can not contain 7s, 8s or 9s. Because each row and column of the border of the inner 5x5 square can only have at most one 7,8 or 9 in the row/column itself and for the other rows/columns they must be in the outer squares.
We get to place 6 as the first number like in the video, and the rest of the puzzle is straightforward after.
Managed to solve in 4:54 // Obviously I had a lot of help with the title of the video, since I knew to actively look for jellyfishes, which aren't too difficult to find in such a symmetrical puzzle... would have taken much longer if I had found this as part of a daily random Sudoku or something similar. Thank you for the fun puzzle and video.
P.S. It's been a couple of months so other people may know this already; but I've only just noticed that Andrew's solver has been updated to include Gurth's symmetry in its algorithm since Sep 2019.
Interesting, since along with the 'permutations technique' a few weeks back, Gurth's symmetry is one of the techniques introduced on this channel that just completely blew my mind and made me realize that Sudoku is a puzzle with incredible depth and mystery... Once again thanks to this channel for helping me so much with my Sudoku solving.
It took me a while, but when I saw that 3x3 block of given digits and realised what that meant for the 789's in conjunction with row 7, everything fell into place. I was gleaming with joy as I solved the puzzle.
Such an elegant setup. I stared the board for 10 mins unable to put anything down. Truly remarkable puzzle.
Remarkable? I think not!
Wow, another new App on the way from my absolutely favourite Sudoku team. Bring it on 👍
Thank you Simon. I love the way you explain things. I'm keeping up with you and learn so much - it's opened the world of Sudoku beyond hard puzzles for me. Thank you!
It took be about 90 minutes to understand the jellyfish completely, but once I got it I was so pleased. Very cool puzzle.
Out of curiosity, I've told Andrew Stuart's solver to take it step by step and I have to say It goes straight to the jellyfish times three, and then everything after that is all basic, the most complex spot after that is the 789 triple in row 6 (or the 236 triple, which is the one it founds, but those are one and the same) and the twos in the central box eliminating a two in r8c6.
Brilliant. Thank you, very clear tutorial and YES so looking forward to your new App.
That was just cool. I suspect one would never see a jellyfish in a computer generated puzzle. It might be interesting to get Sam or one of the other really top notch puzzle makers for an interview at some point. Hearing about how they go about creating something like this would be kind of neat if they were willing to share.
I just encountered a jellyfish in a computer generated puzzle. Have never heard of it before the hints told me what it was. That's why I'm here, because I wanted to learn how it works.
There is an other trick to solve this puzzle! For this we need to use the symmetry where the small outer corners (size 2x2) of the grid must hold exactly the same digits as the inner ring from c33 (cell at row 3 and column 3) to c37 - c77 - c73 and back to c33. Using this symmetry-trick we know that the inner ring must contain the numbers 7, 8, 9 and one other unknown digit. This is because those three numbers are in small outer corners (7 is in the 2x2 top-left corner, 8 in the 2x2 bottom right corner and 9 in the 2x2 bottom left corner). Now we can ask the question whether the numbers 7, 8 or 9 could be the remaining unknown digit of the inner ring. The answer NO. If we place for instance a 7 in row 6 of the inner ring we know that in the center 3x3 box there must go a 7 in column 6 and therefore there is no second empty cell of the inner ring where a second 7 can go. The same applies to the numbers 8 and 9. We still do not know the missing digit in the inner ring, but it is not 7, 8 or 9. And that would rule out these numbers from all empty cells in all outer 2x2 corners. Once we realize this we can check the remaining options for those empty cells and start filling in the digits of the inner ring into the 2x2 outer boxes. Doing so we would find out that all numbers in the outer boxes could be placed except for c22 where a 3-5 pair is remaining. But having these seven digits is enough to break the puzzle open.
In case you wonder why the symmetry logic exists, it has been beautifully explained by Simon in another video. The trick is as follows: If we compare box 1 with row 3 we know that the six numbers in c11, c12, c13, c21, c22 &c23 must be equal to the numbers form c34 to c38. Simon is calling the New-York-Times trick. The same can be done with box 3 and column 6. Therefore both small corners (c11,c12,c21,c22 and c18,c19,c28,c29) plus the extra cells c13/c23 in box1 and c38/c39 in box 3 must contain together the same digits as row c33 to c37 plus the extra cells c38/c39 in box3 and the column c47 to c77 plus the extra cells c87/c97 in box 9. We now can leave out the cells c38/c39 from both sets of cells and still both sets will contain the same digits. We than doing the New-York-Times trick again with box 9 and row 7 and adding the extra small corner (c88,c89,c98,c99) plus its extra cells c87/c97 to the small corner set and at the same time the additional row between c76 to c73 plus the extra cells c71/c72 in box 7 is added to the inner circle set. We now notice that the extra cells c78/c97 are in both sets of equal digits, which allows to remove these cells from both sets. Finally this can be done with column 3 and box 7 after which not only the cells c71/c72 are double both also cells c13/c23. This finally leads to the conclusion that the digits in center ring c33-c37-c77-c36-c33 must be equal to the digits in the four small 2x2 outer corners of the grid.
Awesome news! Just finished level 50 yesterday on the sandwich app - looking forward to the classic puzzles!
I've spotted not just jellyfish before, but also finned jellyfish and even SASHIMI jellyfish! One puzzle I tried gave me TWO finned jellyfish. It's crazy what you can spot if you try hard enough.
Gret news! Glad you guys keep growing!
Got it with just normal sudoku pencil marks, then realized that picking a single 1 defined all the rest, which seriously limited the other options. Unfortunately I picked the wrong one to start, but then undid everything and it was fine after that.
That is what I did too.
I'm gonna coin the term octopus, in which the same number appears in exactly 8 rows and 8 columns.
This puzzle was linked in a thread on the discord server in reference to ‘Jellyfish’. Simon’s inch by inch explanation helped greatly. Now I’m going to try (again) #40 in the Classic app. Thanks much!
Can't the jellyfish be applied vertically as well, since the puzzle is diagonally symmetrical?
Well, there's only 9 rows and columns in the grid. there's 1 hint for 7 in there, so that leaves 8 rows and columns unknown. Spotting a jellyfish in 4 rows/columns forces the other 4 rows/columns to be a jellifish. Spotting the vertical or the horizontal one is irrelevant, since they both affect the same cells in the grid.
@@3laserbeam3 Ah, ok then, thank you!
If 4 in 4 is a jellyfish, and 3 in 3 is a swordfish, I petition we rename an x-wing to a goldfish.
I've been studying encryption algorithms lately and am tempted to call X-Wings Blowfish instead
At first I was going to do Snyder Notation, until you defined what a jellyfish is. That was Mind blowing. I have never seen a Jellyfish. Until you explained in detail on how it is. I think this may be a perfect practice puzzle for advanced / diabolical difficulty . That was an amazing technique and the puzzle he made/created. Kudos to that creator.
In addition, can Jellyfishes be discovered on rows?
Great puzzle, really looking forward to your classic sudoku app! I wish the title for this video hadn't given away the break in, I wonder if I would have found it on my own.
26:03 Simply amazing. The starting point was insane!
Awesome puzzle! First I tried it before watching the video and the implication of all the jellyfish just didn’t come to me. I had to watch some of the video, and once one jellyfish was explained, I realized the same applied to 7, 8, and 9, and then it all made sense. After coloring all the squares that couldn’t be 7, 8, or 9, it was if I was solving a new “anti-7-8-9” Sudoku variant where none of the colored squares could be 7, 8, or 9.
Just downloaded, thank you!
Great App. Lovely puzzles and variations. Nicely increasing in difficulty and techniques
Cant wait for the classic app, especially on Android. Im not to Sandwich levels yet.
I colored the cells forbidden to 789 by the jellyfish. (I didn't want to juggle things in my memory.) I used all five columns -- any 7, 8, or 9 in a jellyfish-forbidden region would be forbidden by the given digit if not the jellyfish.
Good job Simon!
Multiple times you left hanging numbers such as you marked corner 3's in the 2nd box down on the left, eliminated one of them and left the other hanging (it was your very last square to fill in for the puzzle). There were others on the right side. Had you Snyder'd the 2s in the top right box out of the gate, that would have sped things up immensely as well. With all that said, the quadruple jellyfish was brilliant. I had no clue what that meant nor could I crack this puzzle w/o it. Once you got that started for me, the rest started falling...
Out of curiosity, since there is only one 7,8,9 in the puzzle, would this not be vulnerable to the substitution method? I'd like to see that since that method was kinda new.
I had been wondering what a jellyfish was referring to, now I know. I noticed that all three were in fact double, but they did not all line up on the other axis (cos they simply could not). Wonderful puzzle to highlight jellyfish on.
Can't wait for the classic app. Loved this puzzle though I stared at it for 15 minutes before giving up and watching the video.
I’m watching this to try to understand the jellyfish hint for Puzzle 40 in the Classic Sudoku app
i have one request for the app(s) ... could u guys plz add the ability to do both Corner & Center pencil-marking? just like we can currently do on ur software to solve these in-video puzzles?
*EDIT* : holy Jesus this puzzle was the most insane Sudoku i've ever seen!
Already working on it!
solved it with a long logic chain instead. like the jellyfish method better xD
Hello I have the new classic sudoku. What do I do when I have no 8dea on how you arrived at your clue. Also on puzzle 40 do you hav3 to fill in all possible numbers before you solve any boxes. Not happ6 with the help on this program. J
Have you ever tried live streaming e.g. on Twitch? Like Magnus Carlsen (chess world champion)
Disabling Jellyfish, Stuart’s solver takes 11 (mostly arduous chaining) steps to place a first digit. It continues to report “diabolical” for many more chaining steps. 😊
Will this app also be available for cell phones?
How would Mark solve this?
I solved it by bifurcation on the ones which were very limited. Once you got the one in column 2, row 8 the puzzle was possible without any clever techniques at all (it was only first number I could put in the grid) It was quite laborious though!
I really want to see a variety of different puzzle types (like what you have solved for us recently). Will all puzzle types be available in the app?
Is there a term for 2 intersecting jellyfishes, as seen in this one? makes a nice massive "PLUS" with the 789s, beautifully restricting the puzzle, mainly the squares outside that can't be 789. Even looks great aesthetically!
Took me 1:29:17. Didn't know what a jellyfish was, one of the most brutal solves I've ever done, never had so many pencil marks on a board, very distracting. In the end the effect was the same, of restricting r1c1 to a 6, r1c9 to a 1, and so on. After that it was smooth sailing. But damn, did I feel ashamed when I watched this video.
You got me very excited with the announcement for the classic sudoku game. I only hope that you don't mean by varying difficulties, the first 40 are challanging and the following 60 are only solvable for excperienced experts. Still gonna buy the game, it's enought to know that these were created by world renowned setters, no matter how good I will pervail in this challange, I want to enjoy the beauty of sudoku.
The 5 monthly puzzles will be of varying difficulty as well as the initial 40 puzzles.
So I solved it, but I'm not sure I deserve full credit on the solve. The only reason I solved it is because the undo button exists. I guess where a One went (based on snyder notation, it was a 50/50) and after a long chain of success, there wound up a collision and the puzzle broke. So I pressed undo a hundred times, and placed the 1 in the correct spot.
When I did, that filled in all the 1s, which filled in more and more of the grid and the entire grid unwinded. (Actually, in a similar pattern to Simon)
I technically did solve it in 40 minutes. Thanks to the programmers for including an UNDO button, so I can follow my gut.
Isn't there three other jellyfish in it? But in the columns, because of the symmetry. Or am I seeing that wrong?
The jellyfish extends into columns as well.
Amazing how this puzzle is impossible without knowing the jellyfish technique but relatively easy once you do recognize it
WROOOONG! This was a simple solve w regular techniques.
I have no idea what any of this sudoku lingo means, but this is insanely cool
Just like any lingo, just need to study it.
In the sandwich sudoku app I think the numbers should be bigger, when I get a notification the bottom of the phone appears and it blocks the numbers (I have an s8 if you need a reference)
Other than that, te app is really great
Will we get workshop or some kind of level editor once all the puzzles are out for the app?
6:41 - no it’s not clear. A 7 can go in the entire upper row except columns 7and 9. Similarly rows 7, 8and 9. Why are you limited to looking at those 4 rows?
Listen carefully beginning at 5:56. Each of the four rows he highlights needs a 7 and they must go in columns 1, 2, 6, and 8 to complete those rows. Since one 7 must already be in each of those columns, there can’t be another 7 in row 1 (or any other row in those columns.)
Beginning at 6:10, he proves it the other way around. He tries to put a 7 in row 1, column 6, and shows that would only allow three 7s in the four rows, so the 7 can’t go in row 1 (and by the same logic, columns 2, 6, or 8.)
Lol, I was staring at the puzzle for 10 mins and I was not able to put any number in the grid. The jellyfish trick is great!
I dont understand it though 😂
11:31 - places first digit
mindblowing!
I'm not sure if this is the best place to ask, but I'll do it anyway. I'd like to get some recommendations for puzzle books. I'm particularly interested in books with a variety of puzzles, not just sudoku. (Although sudoku-only books would be okay.)
I buy the 'Year' books from the 'nikoli' store in Japan. They have a web presence (nikoli.com) and accept Pay Pal. The books contain many different types of Japanese pencil puzzles and these particular books have English Instructions. They sell the 2017, 2018 and 2019 editions and they cost 1000 Yen each (about £7.50) and P&P is going to add another 1000 yen to your order so you can get all 3 puzzle books posted to you for less than £30. I cannot recommend these books highly enough. If you enjoy puzzles you will adore these books. Hope this helps.
in 14 mminits, i had solved one.
you are clever.
also 3 jellyfish in the rows but I have never heard of them before so didnt really know what to do with them
Gave up after 25 minutes and no numbers places on the grid
Edit: I'd never heard of jellyfishes in my life lol
Instead of looking at row 3, 4, 5 and 7 to find the three jellyfishes you can also look at column 3, 4, 5 and 7 and find three ADDITIONAL jellyfishes, one for 7, one for 8 and one for 9... amazing puzzle :D
Well let's look at it this way. There is one given 7, 8, and 9 in the grid. Since there's a jellyfish on those three digits in those rows, then there must be a corresponding jellyfish in those columns because when five of the columns are "occupied" by a digit, the remaining four must then contain exactly four of that digit. As an adjacent example, if you have four of some digit and you find a swordfish on that digit, then there's a corresponding X-wing on that digit on the rows/columns that aren't part of the swordfish because then you have 4 + 3 = 7 rows/columns containing that particular digit.
While I can appreciate the beauty of this puzzle, I'd still like to pursue other avenues to solving it than having to find a jellyfish pattern.
Edit: I just redid this puzzle. Without watching the video. By brute forcing all candidates then spotting that the '1' candidate can be removed from r9c1 you basically end up with only singles and I solved the puzzle in 5:24. No advanced logic necessary. Frankly, the puzzle was pretty boring then.
So yes, it's a brilliant puzzle. Your very first move is to remove a single candidate digit, and the puzzle is basically solved.
I wouldn't have found this by solving on paper, only using a digital device made it easy to enter the candidates.
19:10 Um, Simon, you do realize that one of those 7s in the 8th cell isn't in a jellyfish when it needs to be, right? There are both horizontal and vertical jellyfish extending from that inside square of numbers. There are a total of 6 jellyfish in this grid, one set up and down from the center square and one set left and right from the center square, if I understand jellyfish right.
Well this is correct. If you have one of a given digit and a jellyfish on that digit, then you have a corresponding jellyfish on the same digit somewhere else.
The first time I try doing one of the puzzles myself I get stuck putting 1 number in. If you don't know what a jellyfish is how do you solve it? I stood no chance until I watched you solve it.
My dear Catflap, if you've watched and learned from Simon, this was an EASY puzzle. Using his notations, recognizing some x wings, finding a few restricted cells, I solved this in 24min. I clicked check and it was right. I screenshot and compared to his final and it was identical. So not sure what system you use, but it just needs "worked out."
Looking forward to the release on Steam! (Edit)....Haha I see it's just been released......
Duncan's Sudoku Solver cannot be installed in Windows 10. It needs .NET Framework 3.5 to be installed to continue loading, which is not able to be installed on a Windows 10 machine as its already there (.NET Framework 2.0 to 4.8) but the software doesn't recognise this fact during the install process and shuts down! It shows the error code: 0x80070422.
Can you update this program to run on a Windows 10 machine by either not looking for .NET Framework to finish installing or including a mix of .NET Framework versions?
Thanks for explaining the jellyfish. I had a puzzle a while back in a PC puzzle app which was shown under the category of simple but when I put into the solver it was shown as diabolical and needed the jellyfish to solve.
nice
i wish this was a live solve lmao
live or not he makes jelly for top left and right but ignores bottom left :/
What if it had been designed so that one more number had been a jellyfish? Would that have violated uniqueness?
Wild.
So a "Jellyfish" is basically an X-wing involving more than 2 rows/columns?
Haha
the progression ive noticed goes: xwing(2), swordfish(3), jellyfish(4). Now I wanna know what the 5row/column one is called
@@DDvargas123 Insanity. It's called Insanity.
There are many types of fishes, with the 'simple' ones Jellyfish is the biggest you can get, but there's many variations and in some you can go further.
- On Basic, Finned, Sashimi and Siamese fishes you can only have X-Wing, Swordfish, Jellyfish
- On Franken fishes (which can also be Finned, Sashimi or Siamese) exactly the same, except for a special Siamese called 'Double Finned Franken' that adds an extra column/row
- Finally Mutant Fishes can go beyond the Jellyfish with Squirmbag=5, Whale=6 but these are very rare, pretty much undetectable by a human, and in many cases avoidable using easier alternatives.
Fun fact: The most candidates you can eliminate with a fish are 20, and you can only get that with a Basic Jellyfish.
Here's an example, it's very satisfying to watch:
www.sudokuwiki.org/sudoku.htm?bd=000000000017020803003000204084053706000000000072010005048071502035040601000000000
Daniel V Believe it or not, the 5-level extension is called a “squirmbag.”
only the 6:5 is breaking the symmetry...
This section is . . . Let's just say unique.
Day 5 of asking for night mode 🙏
Do you think they haven't seen your request? Repeating it just makes you annoying.
I'm pretty sure there were 6 jellyfish
I saw the jellyfish, but had no idea what it meant or how it could help.
25m42sec
Ok... one hour in and I don't have a SINGLE number. Clearly this one is kinda hard for me.
I love Simon and CC. I've learned alot. BUT.....this puzzle was "easy" with absolutely NOTHING fancy. No swordfish, no sashimi. No chains. Just 2 simple x wings. Nothing else. I played it "straight up" and there was nothing challenging. This app operation is not ideal, but it kept me on my toes. I'm gonna watch the video now and compare.
Just watched it....I like it. Common usage? Prolly not.
As a notation-free solver I stared into the grid 10 minutes in vain. Then I pencil-marked everything possible, triple-checked everyting and many more times, another 20 minutes not a jack filled in. Then I noticed, a bit pissed off, the grid is somewhat symmetrical and spend about 30 minutes trying to get to work something which obviously wouldn't. Now that I know the solution I must honestly say I don't quite like puzzles which require one to know one certain trick (unspottable to me, as you can hardly spot something you're not looking for) without which they are impossible to solve.
A fascinating bit of academics, but I agree in that I’d not spot this trick ever! I appreciate the study anyway. Thx.
you can figure out that trick by yourself with logic. You did not spot it, it does not make it a bad puzzle.