She Makes The Numbers Dance!

Our book is very close to release - thanks to everyone who supported the Kickstarter. If you still need to order it then you can do so here:
www.kickstarter.com/projects/...
Today's puzzle comes from one of the world's favourite constructors, shye. This one has simple and yet devious rules! And, as ever, shye makes the numbers dance before our eyes. You can give it a try at the link below:
app.crackingthecryptic.com/su...
Rules:
Normal sudoku rules apply. Digits in the first column indicate in which column the digit 1 is placed in the respective row. Digits in the fifth column indicate in which column the digit 5 is placed in the respective row. Digits in the ninth column indicate in which column the digit 9 is placed in the respective row.
PS Episode 5 of Simon attempting to play The Witness should happen on Tuesday evening next week at 10pm UK time. We'll announce it on Twitter (@crypticcracking).
PPS If we manage to reach 400,000 subscribers then we'll be releasing a video where Mark and Simon answer community questions! Please email us at [e-mail] if you have a good question for them :)
▶ MORE PATREON MADNESS ◀
We've just released Heatwave, a set of incredible thermo sudokus by the astrophysicist grkles! (Don't worry you don't need to be a rocket scientist to solve them!) You can join us on Patreon here:
/ crackingthecryptic
▶ SUDOKU PAD - Our New App ◀
You can now input your own classic sudoku puzzles into our software using our new App! The app also comes with 12 handmade puzzles from us and it should be released any moment at these links:
iOS:
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Android:
play.google.com/store/apps/de...
**************************************************************
▶ OUR NEW ARROW SUDOKU APP IS OUT ON ALL PLATFORMS!
Here are the links:
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App Store:
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Google Play:
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▶ OUR NEW KILLER SUDOKU APP IS OUT ON ALL PLATFORMS◀
apps.apple.com/us/app/killer-...
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▶ SIMON REACTION BOARD (!) ◀
With thanks to Andrea for creating this :)
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▶ CTC FAN DISCORD SERVER◀
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NEW: Guide To Our Discord Server:
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▶ OUR BACK CATALOGUE - ALL CATEGORISED WITH LINKS!◀
tinyurl.com/CTCCatalogue
▶ OUR NEW THERMO SUDOKU APP IS OUT!◀
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Android: play.google.com/store/apps/de...
Steam: store.steampowered.com/app/13...
▶ NEW CRACKING THE CRYPTIC MERCHANDISE◀
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▶ OUR CHESS SUDOKU APP IS NOW OUT!◀
AppStore: apps.apple.com/us/app/chess-s...
Steam: store.steampowered.com/app/12...
Android: play.google.com/store/apps/de...
▶TRY OUR CLASSIC SUDOKU APP◀
AppStore: apps.apple.com/us/app/classic...
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▶TRY OUR SANDWICH SUDOKU APP◀
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▶SOFTWARE◀
Play the puzzle in the video by clicking the link under the video (above). We are building a website which will allow you to enter your own sudoku puzzles into the software and this is coming soon!
▶Logo Design◀
Melvyn Mainini
▶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.
Thank you for watching!
Simon and Mark

[@shye229]

yay!! happy to see you found the trick here and enjoyed it. big thanks to sam c-l for showing me the variant, its great to see its become popular again too. i came up with this one while watching one of your streams of the witness actually, it was a lovely evening and happy birthday svenja!

[@DearDevil8115]

for the beauty of this puzzle! Amazing Artwork!

[@Anne_Mahoney]

Oddly, I'd just done a 1/5/9 from an old Sudoku Grand Prix set. I though it was OK but sort of gimmicky. In your hands, it doesn't seem like a gimmick -- nice puzzle!

[@Jaxom35x]

I, for once, actually caught the swordfish without help. This was a very lovely puzzle for sure. I took a harder, round-about way from Simon. I didn't catch the 3 x-wing. I had worked out the sevens co-ordination by color and once I got to the 1-5 workings in boxes 1 and 2 that would place the 9 and 3 in row one. I then knew where all the sevens went. It's rare I can finish a puzzle and then watch Simon do it more efficiently, usually I need a hint or tip from Simons work.

[@TheLifeLaVita]

this one was amazing. Not only it wasn't super hard but actually very doable, but it was also really fun to do and different. Really good job shye

[@dwarfigplays9806]

That was hard, but very fun to solve! Thanks!

[@Dalixam]

I like how Simon quickly spots the 159 7-swordfish and then soon after pencil marks a 7 into the green c2r5

[@ceevio_art]

ADSD - Attention Deficit Sudoku Disorder

[@andrewsparkes8829]

And then, once he's got the 7 in r1c1, doesn't even make r1c7 a 1 for far too long...

[@Numberplay]

I think another cool way to use this rule is that each shaded cell in a block has to be a low (123), mid (456) and high (789) digit. That could be a useful info for when we mix this rule with others.

[@pixllo]

This needs more upvoting so it might catch some crazy setter's eye

[@chaotix37]

Theres a variant called trio sudoku based on that rule.

[@waldolala2]

This is how I approached the puzzle and which let me solve it in 15:48

[@sarveshnal200]

we can include thermos/killer clues to leverage this fact

[@goalinsight6530]

Ohhhhhh, that was so much fun to solve. Using rows 159 AND columns 159... very nice idea. The constructing was so smooth (like butter!), and is the type of puzzle that makes the solver feel smarter than we deserve. Thank you, shye!

[@susanne5803]

Happy birthday, Svenja! And success and happiness with your master in archeology!

[@DidWeWin1]

"There's a seven in one of those two squares. I'm not sure if we can resolve that." I laughed so hard. love these videos.

[@pedrocanals670]

swordfish, x-wing, swordfish.......

[@Nevir202]

20:38 You're killing me here, penciling 7 as an option into a square eliminated by the swordfish you've been talking about lol.

[@Bonar09]

This puzzle was the fastest I've ever spotted a swordfish. Great idea and an approachable puzzle!

[@CraigBoothOnline]

This puzzle is the FIRST time I have independently spotted a swordfish, and made me feel really clever in walking me to it. Really, really well designed puzzle

[@losremos5770]

i love this 1-5-9 concept so creative and beautiful

[@DubioserKerl]

I love this rule set. As a computer programmer, I am familiar with indexing and pointers, snd therefore this ruleset felt really approachble for me :-)

[@jackw7714]

Weren't you confused that the rows started at index 1? ;)

[@lof747]

@@jackw7714 Always need to get my head around Matlab and other programming language lol

[@BlueCyann]

As a not computer programmer, the way it kept turning back on itself made my brain hurt. Proud to have fumbled my way through it.

[@jamestodd7485]

@@jackw7714 No index 0 pointers, please! That's null! :)

[@zadrik1337]

I completely agree

[@TurquoizeGoldscraper]

42:02 for me - I am impressed that someone came up with this rule set and made a puzzle that worked. The trick is that in columns 1, 5 and 9, in each box you have to have a number from each of 1-3, 4-6 and 7-9.

[@leojs5673]

Always an incredible treat to play one of Shye’s puzzles

[@gackmcshite4724]

Absurdly elegant.

[@oliverstvchannel6442]

Indeed

[@tsbit]

This was a lot of fun to watch! Congratulations Shye and Simon :)

[@amoswittenbergsmusings]

Great puzzle by Shye! Extremely educative solve by Simon. I did solve it before watching and I am proud to say I found the swordfish almost instantly. All in all 37:41 according to the timer. All credit goes to Mark and Simon because of the master classes they have been giving over time. Crowd, we have come a long way. When I started to follow CtC, I would not have spotted a swordfish if someone would have slapped one in my face.

[@ragnkja]

The title immediately told me that it had to be by one of about a handful of setters whose puzzles we’ve enjoyed many times, and yes, it _is_ by one of them: Shye!

[@joopjansen9102]

Brain scrambled ;-) Was able to finish it, once you explained the implications. The Swordfish leading to the X-wing leading back to the Swordfish, leading to another X-wing - brilliant.

[@andrewshirley9240]

One small bit of logic that I think you didn't cover (because it's completely unnecessary for the solve, but I find it beautiful)- Each box's orange's stripe can effectively only take one of each set {1,2,3}, {4,5,6}, and {7,8,9}. If you took two numbers from the same set, then it would map the corresponding digit into the same box, which is clearly invalid! I used this trick to get some easy digits in box 1 once you got the 7 placed. The only remaining digit in set 1 was 1, and the only remaining digit in set 2 was 5, meaning the orange squares were a 1/5 pair and the green squares were an 8/9 pair (resolvable).

[@siorac1147]

I couldn't have solved the puzzle without this bit of logic and now I'm really curious to see how Simon did it because the only way I could do it was figuring out that 1 and 5 in column 1 both have to be in box 1.

[@marcosharlequin]

I am not sure it is unnecessary for the solve. It is good logic. It makes for an entirely different solve, no way as flashy as the swordfish, but you can slowly plod through the grid methodically using it, and get to the answer.

[@AlphaNumericNZ0]

This is how I solved the puzzle - I think it was the one of the first things I noticed, and made this one of the easier puzzles I've done on this channel. I was surprised he didn't use it when I watched the video. Very interesting to think how we can use different logic and still get to the same answers. Very fun solve.

[@YonatanZunger]

What fun! Keeping track of the rule stretched my brain - even though I'm a programmer! - but in such a pleasing way. Great job, shye!

[@BillySpelchan]

This is the first (and probably only) time I've understood the logic of a puzzle better than Simon. Thank you, Shye, for creating a puzzle that allowed me to shout at the screen for a change.

[@livedandletdie]

I read the title and thought what has Shye done now... and lo and behold it was Shye who had done the puzzle. I'll give it a try, her puzzles are quite engrossing.

[@VeritasUnae]

What a fantastic way to use the 159 variant! I loved how all the deductions bounced around, exceptional work, shye c: It was a joy to watch Simon solve this one, for sure.

[@Ennar]

Beautiful puzzle. Judging by the length of the video, I expected it to take me an hour or so, but I got 37:06 which makes me quite happy! Learned a lot from this channel.

[@MikeFisch]

This scrambled my mind so much, I had to restart it 3 times because my logic was wrong on the first try, and then I didn't believe myself the second time and I got so confused I just restarted again and got it then within 30 minutes of trying. Great puzzle!

[@susanne5803]

Dear Shye, I can't tell you how grateful I am, that you didn't apply this rule to all digits. I currently have a sprained brain from finding three digits on my own - yet not being very sure about two of them: help by video is required. Thank you very much for creating such aesthetically pleasing puzzles!

[@saisaipech]

One of the most satisfying sudokus I've ever played. 29:28. Within the timeframe of the video but still longer than my namesake's time.

[@lukasdarijtschuk5078]

Today marks the first time I was able to solve both sudokus. I am so proud of myself. I am still pretty shitty but it’s the small steps that count. Thank you guys for producing such quality content

[@DerMarkus1982]

Interesting and cunning way to create interaction between cells outside of the classical Sudoku ruleset *without* cluttering the grid up too much with arrows&lines, circles, cages,, Kropki Dots etc. "Chapeau!" to shye! And {clicks "Thumb up"} here! - this is for you, Simon, for another quick and consistent solve, Simon! Keep up your exploration of the Sudokuverse, you absolute character! 😉

[@jonbrowne8334]

Ashamed to say that I find even the rules hard to understand! Time to watch in awe!

[@constantinpiber1337]

Say this in the discord archive a while back, very fascinating Proud to say that I got the swordfish almost as fast as Simon :D

[@etienneschramm83]

85 min for me, but they felt like 10. I was shocked when I saw that a full hour had already passed the first time I looked at the timer. I was very enjoyable, but it gave me quite a strange feeling when it suddenly collapsed, when I was not at all expecting it. It not at all because of the puzzle, but because I had been overlooking one simple deduction, that must have been available for quite a while. Great puzzle.

[@linsuben]

Almost exactly the same as me. 65 minutes of seeming to make little progress then it all collapsed quickly.

[@dmmax18]

I see a puzzle from Shye - I press like

[@amoswittenbergsmusings]

I tune in to CtC - I press like.

[@six_5000]

Got it! In iust under an hour. I quite liked this ruleset, as opposed to yesterdays jovial nightmare

[@gordonglenn2089]

Link: kzbin.info/www/bejne/gGGyh3ebrJh7nZY is a 159 Sudoku solved by Mark and includes [SPOILER] the pre-solved grid (don't peek!) P.S. I love this variation.

[@bdfornever]

Shye releases a brew sudoku: Simon: *very happy*

[@doriswlongAgoandfarAway]

I understand now why people yell at their screen while Simon is solving. :)

[@glennmelven3414]

He can be quite frustrating at times at spotting simple things. But I just remember that while I am spotting the simple, he sees something complex that breaks the puzzle open.

[@chronicsmith1115]

Simon's use of the word index made this puzzle's rule set instantly accessible. Looking forward to some Myst-y-eyed Simon.

[@5t757]

23:05. Excellent logic. Having previously done the easier (GAS) puzzle like this helped me a fair bit!

[@zabeeklman7782]

The GAS helped me too! I got 26:03 closest I have ever been to Simon's time!

[@chump5876]

Simon struggled with the new rules. But as he figures it out it makes me happy.

[@glennmelven3414]

Took a bit to get used to the ruleset, and finished in 39 minutes.

[@jesperwillems_]

21:45 for me, really enjoyed this ruleset! Didn’t fully grasp it at first, but when I saw the puzzle itself it became apparent quickly. And starting the puzzle with a swordfish? Absolutely brilliant

[@khayman9574]

Well, after some 45 minutes playing around with a swordfish and an x-wing, I realised I could place a 3 in r6c1 which, for me, unraveled the puzzle. 😅

[@sonalita_]

I got stuck in exactly the same place. Slapped myself after watching simon pencil mark the 3's in box 1, paused the video and finished the rest in about 15 minutes. That 3 unlocks everything!

[@jounik]

Content-addressable sudoku. An interesting concept!

[@mordirit8727]

This was a weird race for me... I got mostly the same time as Simon, 30:17 (he must have been a little faster since the intro is so long) but coming back to watch, by the time I had most of the grid solved (~20 minutes) he seemed to be barely starting, after his huge swordfish-xwing debacle, techniques I didn't use at all to solve... Yet once he was done logicing the places 7s couldn't go, I see him cut through the rest of the puzzle like a red hot knife through third grade butter. Really made me appreciate how elegant this method of solving is, and how much of what I do is still essentially brute forcing, this channel is always pushing me to improve my skills ^^

[@inspiringsand123]

Rules: 02:57 Let's get cracking: 06:46 And how about this video's Simarkisms?! Sorry: 4 (07:52, 15:17, 18:28, 19:14) The Answer is: 4 (15:33, 22:19, 26:24, 28:24) Clever: 4 (19:18, 19:41, 30:50, 31:31) Good Grief: 1 (07:47) Knowledge Bomb: 1 (20:53) Apologies: 1 (16:13) FAQ: Q1: How do you do this so fast? A1: I'm not made of flesh and blood, but of sand ... Q2: Why don't you include 'XX' and 'YY'? A2: Please tell me what you'd like me to include and there's a good chance I'll add it! Q3: You missed 'XX' at 'YY:ZZ'! A3: That could very well be the case! Human speech is hard to understand for computers like me, especially British sometimes! Point out the ones that I missed and maybe I'll learn!

[@ChilapaOfTheAmazons]

Thanks for the valuable service that you provide, my friend. 😘

[@marlinde3136]

Bobbins!

[@StarTheTripleDevil]

There is a bobbins at 13:43

[@Afterthoughtbtw]

Shade under 19 minutes for me. Don't think I've ever done one of these puzzles. At least if I had I've forgotten it. Quite a fun little variant.

[@veronicaacevedo4314]

I have never been screaming at the screen so much! Thanks Simon and Shye

[@yoyokid9102]

I am so surprised of myself that I resolved this without any help.

[@arpwable]

First time I've ever done a puzzle quicker than the length of the video, 22 minutes! Very happy with myself... Though I'm sure if Simon cut out all his explanations he'd have done it faster than that

[@kelcywinter1193]

Could this be done with other numbers instead of 1-5-9? Such as maybe 1-4-7 (Snooker Maximum)?

[@ragnkja]

I see no reason why you couldn’t make that variant, as it’s just a relabelling and a few column-swaps within blocks.

[@amoswittenbergsmusings]

There is no obvious reason why not. The entire indirection concept opens the floodgates for puzzles in which cell values do double duty: they eliminate themselves from row, column and box, *and* their potential target cells serve to restrict their index cell. You could vary the indexing method and perhaps even use double indexing in some form. My head spins. All these sudoku variants take the place of non-given given digits. Who could have thought that so much about sudoku still remains to be discovered? I ought to check out the discord server one of these days. I'm just afraid it would leave me no time for secondary things like eating and sleeping.

[@MariaVlasiou]

Beautiful. I solved this puzzle with no guessing but a mess of notation. I knew that I was missing the beauty, so I came to the video. Gorgeous.

[@Rukimix]

47:39, took me a while to get the rule patterns down, never seen one like that, really cool puzzle!

[@34veljko]

This has been the quickest i have ever screamed at Simon,about 15 seconds into the puzzle. And also the first time i have screamed for 3 different things at the same time. Overall great puzzle.

[@dma-rising8876]

For perhaps the first time ever as long as I've been watching Simon appearing as somewhat mortal. First time I've felt "well, we're not in the same league, but at least we're both playing the same sport" Loved this puzzle and the easiest to follow ruleset to date to get my head around beyond 'normal'

[@chinchilla_blubber]

18 minutes today. First time I was faster than Simon.

[@BrooksMoses]

37:43. Fascinating! And lots of fun. I'm pretty pleased with my time, too.

[@JusteazyGames]

The most interesting thing about this puzzle is that it's completely logically solvable without using the swordfish. I am still new to the advanced sudoku world, and I spotted the swordfish right away and then... just stared at it for a while thinking "I know Simon taught me what to do next, but I can't remember...." Eventually I found a logical path on the left (1s column), then solved the right before the center, and followed it up outside in. Simon, meanwhile, had a much more efficient path using the swordfish, and went right left center, then inside out. Brilliant puzzle.

[@emilywilliams3237]

The tour of older videos continues, but this time I am pretty sure I saw the video when it was released last year. However, I did not try the puzzle then, but I did just now - very fun. I remember, as I watched this today, that this was early in my astonishment phase where every thing and every word was a revelation of something I had not thought about before. Today I have evidence of my growth understanding Sudoku, as I found this fascinating, yes, and astonishing, yes, but also very understandable. Wow, CTC, what a journey I have gone on to be where I am today with so much more skill as a solver. Thank you so much for the fun and clear roadmap I've been following through all of your videos and other content.

[@derx6666]

I had trouble understanding these rules, but you explained it perfectly again Simon. What a genius puzzle. Kudos Shye and Simon of course for cracking it.

[@alainculos9294]

Another fabulous puzzle. Loved the swordfish and proud to have solved it (in double Simon's time).

[@JuanMataCFC]

the immediate Swordfish on 7's was very neat, i personally like to call it a "reverse Swordfish" logic since we get it using the 159 triple in C7 which is a sort of reverse way to work out that 7's are the constrained digit. 😂 and yes my brain was also scrambled on my solve, it took me 34mins to complete it when really 15mins of those was spent figuring out how the ruleset worked. :D

[@dw8818]

Hooray! It's been a while, but finally one I've completed successfully! Thanks shye, thanks CTC.

[@elinezuidema2214]

I've never done a sudoku with this ruleset before but I really enjoyed it! Not too challeging but still a bit of thinking required to get the puzzle going!

[@CauchyIntegralFormula]

41'27". Very good puzzle, I appreciate that the three columns are initially all blank and (almost) all 1's, 5's, and 9's are missing at start

[@dominikskorjanc]

Head grab counter: 4

[@OverkillSD]

Was able pull off a 16:05 on this, spotted the swordfish almost immediately. Feeling very happy about beating Simon's time on the puzzle for a change, even after taking a long time away from puzzling!

[@Nerdnumberone]

22:05. The 7s in the green rows have been reduced to the blue cells. He hovers his cursor over a 7 sharing a box with a blue cell for far too long. Edit: Them he drifts his cursor over a pencil-marked 7 on the green line.

[@Nerdnumberone]

He got it after a minute.

[@MonologueMusicals]

This one was pretty frustrating to watch Simon ignore the rules of the puzzle. Not seeing the 7 in box 6, not placing the 1 in row 1 after finding the 7 in column 1.

[@AuntyAwesome]

i would not call it ignoring. just being new to the ruleset so defaulting back to his familiar way of solving.

[@knightry]

Strongly agree. I love this channel but seeing him ignore the ruleset repeatedly through the solve got old pretty fast. Felt like he was really off his game today.

[@steliosmamatas2970]

Lol yeah especially when he even had the cursor on 7

[@Varksterable]

@@steliosmamatas2970 I think it has been fairly well established by now that Simon's seemingly normal glasses are actually part of a VR set. And that Sven has modified the software so that the cells immediately near Simon's mouse pointer get turned completely invisible to him, along with the cells at the start and end of the same row/column. 😉

[@markp7262]

21:39 finish. Loved this one. It definitely got me thinking in multiple directions.

[@penningmeestercgkdelft9159]

This was fun to solve! And it helped me a lot this time to use (Goodliffe-style) crowded pencil markings and then eliminate them in order to solve the puzzle quickly.

[@Meldoron]

14:24 That is one of the fastest solves I've ever done. I, honestly, didn't even see the swordfish until I watched the video. As others have mentioned, I found the relationship between high, mid, and low numbers pretty early on and it made the puzzle quite a bit easier.

[@willfancher9775]

Really cool use of swordfish. Isn't it a bit more powerful than Simon seemed to think? He only used it to eliminate sevens from rows, but doesn't it also eliminate sevens from columns? This isn't usually a consideration with swordfishes, because you FIND a swordfish by first eliminating the digit from either rows or columns, but in this case he'd done neither, and found the swordfish via a 159 triple. So couldn't he have solved the sevens a bit more easily if he'd looked at eliminating them from the columns?

[@jdyerjdyer]

Only 56 minutes! I think that means I'm improving! It is still almost twice their time, but a few minutes less. I'll take it! lol, I'd rate this halfway between their GAS puzzles and a normal puzzle for difficulty. Very approachable, but you have to be careful with your thoughts. Thanks for a fun time!

[@elvagabundo4607]

Well done Josh! Keep plugging away : )

[@jdyerjdyer]

@@elvagabundo4607 Thanks!

[@crystalgehrt8861]

Kudos to shye for a really FUN puzzle!

[@peterbriggs3408]

Anyone else shouting 'put the 1 in r1c7!'?

[@kmjohnny]

This puzzle had some really enjoyable breakthroughs for me. Didn't do swordfish or x-wing highlight, but instead highlighting where 159 could not be placed.

[@romainbricout1713]

It took me 1 hour and 11 minutes but I'm proud of myself because I usually can't do the puzzles. Though I must admit that I had to watch the video until Simon spotted and explained the swordfish and then I finished it on my own 😁

[@tjarsun]

This one was fun, I love how once you gat the 7s and 3s it all just fits together, the column logic working two ways. (still took me 35 minutes to solve...)

[@longwaytotipperary]

Wow! Weird and wonderful! Put my reminder on for Tuesday's live stream! Looking forward to Looney Tunes Sudoku on Wednesday!

[@Vicky_C87]

It scrambled my mind. I attempted this puzzle a few times and failed. I then watched Simon do it and I can't believe I didn't figure it out. Simon is so good at explaining his logic.. but then forgets his own logic :) 7 got pencil marked into a green box, which he had just explained couldn't be a 7! Simon you amaze and frustrate me at the same time!

[@jinbe-san]

We did a puzzle with these rules are a daily GAS. I didn’t know it was an existing variant

[@renatordutra]

I saw it appearing in the archives recently. It seems to be a new variant that constructors liked. Well, I liked it too... xD

[@adinmarshall2592]

I saw this cool puzzle that I think you would like on logic masters called Ten Knight. It is rated 95% and is a five star difficulty. It has a knights move restriction and all the killer cages are ten, it looks very hard and impossible to me but it’s been solved 47 times.

[@aliaungst1174]

I love this rule set. I want to see more puzzles like this!

[@adinajohansson2305]

I did it in 24:22!! So proud, always a goal to do it under the time of the video!

[@nightwishlover8913]

That was quite fun!

[@jlnschns]

Simon: Alright time for the rules Also Simon: Somethings wrong I can feel it

[@andyparkerson]

This was the first swordfish I ever found on my own. So exciting! Great puzzle.

[@Urroner]

What a most wonderful, entertaining puzzle!

[@juliannicholls]

Classic Simon. 'We can think more about other things', while hovering over the given 7 that disambiguates the rest of the swordfish, that's now an x-wing, disambiguating the other x-wing into the bargain :-)

[@alexmcdaniel9565]

This is giving me flashbacks to programming classes. Is Shye a programmer? This kind of address storing abstraction is home turf for computer people (not me, I was a rubbish programmer lol)

[@thefallenarm589]

What a gorgeous puzzle !

[@Whothewaynecares]

Thanks for taking a little while to click into this logic, this was the first time i watch your video and not feel completely stupid haha

[@Coyotek4]

Lately (and with a yearning for nostalgia), I've been watching walkthroughs of the classic "MYST". I definitely see similarities between those puzzles and these Sudokus; once you see how everything works, you get such a sense of satisfaction!

[@hoozzahgames9209]

an amazing puzzle, took me about half an hour (had to take a break to do something else so not sure about the exact time) and I actually solved it using the same techniques but finding results in a different order which is fascinating to me. I actually got the 7 in the middle of the grid first after I saw the swordfish rather than the top left one (dont remember how i did it tho :p). Had lots of fun and its definitely approachable but challenging, seeing that this was my first puzzle of this type

[@RangeWilson]

43:48 for me, just identified all the 1s 5s and 9s possibilities, bifurcated a very tight constraint, got to the other path quickly, and it gradually fell into place afterwards.

[@Tfin]

Oh dear, looking at the comments I see swordfish and coloring were in this video. I never stopped to consider those. Took me 37 minutes, maybe double what I do one of the GAS puzzles in. Seemed easy enough with the clues bouncing back and forth. Maybe spotting a swordfish would have sped that up a bit, I don't know.

[@cecelialehmann6112]

I loved this one! Once I wrapped my head around the ruleset I actually found the swordfish and the xwing and I was able to solve this mostly on my own with only one small hint from the video when I missed something obvious. I would rate this one as approchable.

[@bethw3155]

This one was fun, thanks

[@gyongyvernyilas2155]

I love how he tries to explain the first rule and he realises how bad his choices was.

[@Vathorus]

Additional logic that can be taken out of it is that you can split entire 1-9 number set into 3 subsets (123, 456, 789) which can never be in the same box in columns 1/5/9. What Simon said about 2 in box 4 is an example of this principle (once you have 3 in box 4 in column 1, you cannot place 2 next to it in the same column, it has to be either in box 1 (which it can't) or box 7). But it's more general, and can lead to solution much faster, when used everywhere it can be.

[@ksquared5270]

First time I have been able to beat Simon's time on a puzzle! Very proud of my 14:40. :) Great puzzle.