How does Dobble (Spot It) work?

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Check out www.kiwico.com... and get 50% off your first month of any subscription!
Subscribe to Steve Mould’s channel. I sent him the next video challenge along with the Monomatch cards. / stevemould
Support me on Patreon and get sent three "Monomatch Myriad" cards to check.
/ 50645477
Here is the bonus 'behind the cards' video on how I made Monomatch Myriad.
• How I made a game with...
It occurs to me it would be foolish to not provide Amazon referral links but don’t forget about your local independent toy retailers!
USA SPOT IT: www.amazon.com...
UK DOBBLE: www.amazon.co....
This is the student video I mentioned:
"How to make the card game Dobble (and the Maths behind it!)"
• How to make the card g...
Double Dobble
aperiodical.co...
Droste Dobble
christianp.gith...
mathsjam.com/a...
"A finite projective plane exists when the order n is a power of a prime."
mathworld.wolf...
Finite projective plane of order 4 image from here:
demonstrations...
Catch the match!
boardgamegeek....
The American Mathematical Monthly
Vol. 13, No. 11, Nov., 1906 www.jstor.org/...
Vol. 14, No. 5, May, 1907 www.jstor.org/...
CORRECTIONS
- At 06:35 Dimitri Provoost spotted that some of the star and cross symbols on the diagonal red lines are accidentally swapped around. Good spot Dimitri!
- I think once or twice I say "card" when I mean "symbol". I blame too much time spent with projective planes.
- Let me know if you spot any other mistakes!
Thanks to my Patreon supporters who keep me well-stocked with children's card games. And now 101 pentagons all featuring a happy little house.
/ standupmaths
Filming and grading by Alex Genn-Bash
Editing by Matt Parker
Graphics by Sam Hartburn and Matt Parker
Music by Howard Carter
Design by Simon Wright and Adam Robinson
MATT PARKER: Stand-up Mathematician
Website: standupmaths.com/
US book: www.penguinran...
UK book: mathsgear.co.u...

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27 сен 2024

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Комментарии : 2,6 тыс.

@standupmaths 3 года назад

To clarify: all patreon supporters will be emailed 3 Monomatch Myriad cards that no else will get. Solely so they can check them. Report findings here: www.patreon.com/posts/50645477 And thanks again to KiwiCo for making great crates and sponsoring this video: www.kiwico.com/standupmaths

@TheCaphits 3 года назад

Make this into an NFT (and send me one for the idea?)!

@rohitraghunathan 3 года назад

I don't think it'll matter but 10303 isn't divisible by 3. You'll have a card leftover

@Agrajag22 3 года назад

At 20:35 I think you meant to say “two SYMBOLS that match” (not cards)

@SioxerNikita 3 года назад

CAn't help you with the million subs sadly... Been subscribed for years.

@gz3zbz 3 года назад

You didn't link to Steve Mould's channel.

@noahbaden90 3 года назад

It's funny. Matt says that he and Steve Mould are both close to 1,000,000 subs, when the reality is actually that they are both close to *the same* million subscribers.

@unclejimmy7 3 года назад

When I saw Steve's video in my subscription box, I said to myself, "nice, I can't wait to see Matt's video in my subscription box."

@vigilantcosmicpenguin8721 3 года назад

When is Matt going to examine the set theory of his and Steve's subscribers?

@xyz39808 3 года назад

Certainly the most _boring_ way to optimally order a million unique items

@YouLoveBeef 3 года назад

@@vigilantcosmicpenguin8721 Well I would be the anomaly then. I am not yet subscribed to Steve Mould. Didn't know of him until today.

@epauletshark3793 3 года назад

@@YouLoveBeef it is quite a good channel. And yes, I do love beef.

@Bigandrewm 3 года назад

Here's a fun game: actually print out all 10,303 cards and sell them individually, maximum 1 per person. Then, a person who bought one who meets another person who bought one can compare their cards and find out what matches.

@AleksandrStrizhevskiy 3 года назад

That's actually brilliant! What a wonderful meetup idea.

@aldude9511 3 года назад

As you find each symbol on another card you can have them initial it!

@_shadownotes_ 3 года назад

They should be able to steal it! It would be the biggest game of spot it ever.

@JungleLibrary 3 года назад

Then it just happens to be that it's always the happy house

@VivekYadav-ds8oz 3 года назад

"Find your soulmate with this simple (tarot) card game!"

@gregjensen2482 3 года назад

Summary of Stand-up Maths: "What Matt has done: It's on brand."

@vigilantcosmicpenguin8721 3 года назад

It's a Parker brand.

@zenotfun9759 3 года назад

it's a real parker square of a mistake

@muellerhans 3 года назад

The reason why this game doesn't include 57 cards is indeed that the printing company that is used by asmodee (the game company that acquired the rights to Dobble) can only print 55 cards on a print sheet. That's what asmodee told to a german math RU-vidr (DorFuchs) which they sponsered to promote the game.

@AleksandrStrizhevskiy 3 года назад

Should have made a separate print sheet that just prints the missing cars and sorts them into the other sets. But I'm not a business man, maybe that would be too much extra cost for no gain.

@hornylink 3 года назад

@@AleksandrStrizhevskiy that literally doubles the printing costs of the cards to just add 2 cards. (they're gonna charge you for the whole sheet, going from 1 to 2 sheets doubles pricing)

@AleksandrStrizhevskiy 3 года назад

@@hornylink Well it shouldn't double it. You would have one extra sheet for every couple of sheets(55/2 = 22 sheets). But yes they would have to pay more and very few people would appreciate the fact that the set is complete.

@hornylink 3 года назад

@@AleksandrStrizhevskiy nah look at OP, they say that all 55 cards fit on 1 print sheet, so to add 2 more bringing it to the total 57 they'd need to add a second print sheet. You could technically 27 of sheet one per copy of sheet two and shuffle around cut outs to make use of the extra space on sheet two, but that only works if you're doing it by hand, changing a factory line to do that would be an absurd cost.

@AleksandrStrizhevskiy 3 года назад

@@hornylink Yeah thats what I was saying printing a special sheet that just has two differ cards. But yes then you have to retool the factory so that the extra cards get sorted with each sheet of 55 and, it makes sense that it isn't worth it.

@__-cd9ug 3 года назад

When he spotted the happy little house instantly, after I spent 5 minutes not finding it, I though he was some sort of savant

@driesvanoosten4417 3 года назад

I did spot it!

@adampayton4695 3 года назад

There's also a second pair! An circle with an arrow inside! However they are different colors so maybe it's also like the "catch the match game"?

@MD-vs9ff 3 года назад

He is "some sort of" savant. A Parker savant.

@romaindubray2325 3 года назад

@@adampayton4695 That symbol really made me question wether or not he had made them match color as well... decided I'd gone too far to give up now, so that HappyLittleHouse™ was a real relief to find, even though it was one of the last symbols I checked.

@jonahwolfe3396 2 года назад

Same! It took me 4 minutes to find the house. After three minutes I was about to give up but decided that I wanted to prove to myself that my attention span can last more than 3 minutes. But yah, when I saw that he found it in 5 second I was like “what?! How is he so good at this game!” Then I was laughing after he revealed what actually happened.

@Mrsparky492 3 года назад

Others might call it a parker dobble, but I'll use a term from earlier in the video it's a 'doh'bble.

@xxgn 3 года назад

I was looking for this comment.

@chris_hanson7936 3 года назад

Oh my glob! That is literally the first thing that came to mind when I was watching. Then I saw your comment. Hilarious!!! ....classic Parker thing to do 🤣

@oz_jones 2 года назад

Parker Pentagon.

@bloergk 3 года назад

Who would have thought there could be such SORROW in the short phrase "happy little house"...

@bonifaceawa 3 года назад

Bob Ross?

@deanperkins2091 3 года назад

The legendary “Parker’s Dobble”

@Wolforce 3 года назад

Yes thanks i was looking for this

@TimMaddux 3 года назад

“It is on-brand.” -Matt Parker

@jamesonhardy2126 3 года назад

Kind of looking like he's doing it on purpose now.

@EPMTUNES 3 года назад

Parker little house

@aperson1 3 года назад

you have no idea how right you were.

@Motinu 3 года назад

German maths youtuber Dorfuchs asked the producer of the game about the 2 missing cards and the answer was that only 55 cards fit on a print sheet. In his video at about 7:52, automated subtitles in english available.

@wouterlahousse9637 3 года назад

What is your nightmare about? Pythagoras: irrational numbers Euler: e=3 Cantor: infinity Einstein: Heisenberg's uncertainty principle Galois: duelling Parker: A happy little house...

@bonifaceawa 3 года назад

Parker, and Bob Ross!

@uklu 3 года назад

Matt's nightmare is obviously about the clown icon

@phichyasuadsawad1583 5 месяцев назад

No e is 2.718281828459045

@nicksteele5613 3 года назад

This is, with no exaggeration, a question I've had for YEARS. The first time I saw a variation on this game it just PLAGUED me as to how they managed to pull this off. Literally can't wait to see.

@NoisqueVoaProduction 3 года назад

Yeah, I also was asking myself, puzzled by it. It reminds a lot of the logic behind SET. Although SET is a bit more straight forward to the issue while in Dobble it is not part of the gameplay to know how it works... But really cool applied math about... Higher dimension? Projective planes? That sort of advanced math... Pretty cool

@ShuffleboardJerk 3 года назад

I bet you literally could have 🙃

@Fantastic_Mr_Fox Год назад

yeah me too. Well I wouldn't say it has plagued me but yeah I remember 7 year old me or smth like that playing dobble one day (not the first time I had played) wondering A) if all the cards truly had only one match with any other card and B) how they pulled it off

@nocturnhabeo 3 года назад

I feel like every programmer on the planet has done this type of embarrassing mistake. You're awesome man.

@oz_jones 3 года назад

Parker Match

@nocturnhabeo 3 года назад

@UCjlY2PsJoAlrzhK-N8djvVA Saying to yourself "Oh I'll just take the first one of X data set" which results in an annoying or unhelpful pattern you didn't think would show up.

@skyjoe55 3 года назад

"I see no reason random() shouldn't always return 3"

@LCrowsbeak 3 года назад

@@skyjoe55 or 7

@stijnvandrongelen5625 3 года назад

@@skyjoe55 Are you a Debian maintainer?

@KaiLucasZachary 2 года назад

I work professionally as a tutor, and using your guide, I've created my own version of Hebrew Dobble so that I can help people learn how to identify Hebrew letters and vowels. This video is the most comprehensive explanation of the game that I've ever seen.

@homelessrobot Год назад

pretty cool application

@jubileeYAVEL 9 месяцев назад

That's awesome!!!!!!

@Corwin256 3 года назад

I love your ability to take giant mistakes, make them hilarious jokes, and then build a message that it's OK to be imperfect. Come for the laughs, stay for the life-changing attitude shift. And more laughs.

@cjjoyce27 3 года назад

Can't believe you got Steve to film himself trying to find the happy little house

@miriamrosemary9110 3 года назад

So funny when he finds the happy house on another card and he's so confused

@vigilantcosmicpenguin8721 3 года назад

I love how it really showed the passage of time.

@AlphaPhoenixChannel 3 года назад

Can we get confirmation on if Steve was TOLD they were all the smiley house prior to that clip? Because either way, I was rolling...

@arfyness 3 года назад

@@AlphaPhoenixChannel I really think he didn't tell him.

@zacharybarbanell1064 3 года назад

Having done the math before, and having also wondered why there's 55 cards instead of 57, I came to the reasonable conclusion that it's because, since the main way to actually play the game starts with a single card in the center, the remaining 55-1=54 cards can be evenly divided among various numbers of players.

@matthewstuckenbruck5834 3 года назад

Interesting, but why then is the junior version 30 cards? 29 doesn't split very easily. Are the rules different?

@alxjones 3 года назад

This generalizes in an interesting way. If you have N cards to divide amongst a set of players, what is the "best" number of cards to leave out? You could look at the closest "highly divisible number" less than or equal to N, or maybe the number less than or equal to N with the most factors. You might want to prioritize smaller factors since they should represent a more typical group size. You can model this as a question about the LCM of subsets of {1,...,N}. Definitely some interesting mathematics to explore there.

@88porpoise 3 года назад

Money is on someone thinking the multiple of five just looks nicer.

@MrTyler918273 3 года назад

I would guess it doesn't have a mathematical explanation; rather a marketing and/or economic one. Someone in the marketing department probably said "57 (or 31) is an odd number (not just the fact that it is not even, but that it is relatively unusual or unfamiliar). If it will work with a more approachable number, say a multiple of 5, that would look better on the packaging and we can even save a few cents per unit."

@jalsing 3 года назад

Maybe it's just to save money and waste on printing. They might fit nicely 5 across on the stock before they're cut. Same with the smaller set both are multiples of 5....

@JavierYahiko 3 года назад

i love how monomatch myriad ended up giving parker square vibes

@nex 3 года назад

Yeah; I immediately thought “cool, he's made Parker pentagons” :)

@AaronHollander314 3 года назад

It took me 10 minutes to find the match. The more I look the more I saw new symbols.

@jonarcherii 3 года назад

On your pentagon, there is another set of symbols that (kinda) match. They both have a circle with an arrow in it, and they appear the same except the color is different. My theory is that one was an “up” arrow, and one was a “down” arrow, but that bit of information got lost in the randomization of the rotation of each symbol.

@pseudopod 3 года назад

I like how Matt put the clown mathematically as far away as possible, but it was also the physically closest set of cards

@lozzaaa15 3 года назад

goes to show that he believes in maths more than he believes in physics

@ziwuri 2 года назад

@@lozzaaa15 this... actually almost makes sense, in a weird way.

@ahobby 2 года назад

Haven't seen it yet, but I'm guessing he's put it away in manhattan distance or chessboard distance or quasi-euclidean distance, something of the sorts, rather than straight up euclidean distance :P

@jounik 3 года назад

Next in line: Monomismatch Myriad where you have ~10k cards, each with ~100 symbols, the challenge for each pair being to find the one symbol that is *not* on the other card of the pair.

@danielyuan9862 3 года назад

that's just n cards with n-1 symbols each such that you take any n-1 symbols of n total symbols.

@tune_fisch0269 3 года назад

For the German viewers here: Dorfuchs made a very good Video about Dobble a while ago

@mandygoring2001 3 года назад

And he included an explanation why there are only 55 cards in the game...

@SuperMrMuh 3 года назад

@@mandygoring2001 aaand... what is the explanation?

@Sebb747 3 года назад

@@SuperMrMuh It's this video at roughly this timestamp: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-vyYSEDGUdlg.html TL:DR he asked the manufacturer and it's indeed limited by printing; the shop can print exactly 55 cards on a sheet.

@jankisi 3 года назад

I thought I had seen something like that! Thanks

@dracuul78 3 года назад

I have always wondered what magic was needed to design the Dobble cards, thanks for this perfect (and hilarious) explanation. I'm so amazed how well you structure your videos and use these excellent visuals. Starting with the silly 'spot the atom' version, and referring back to it later, I was in tears from laughter...

@quinnmartin4236 3 года назад

The fact that you ended up going full circle and making Spot the Atom accidentally is just too conveniently ironic. God has conspired against us all and it was hilarious.

@tristanwegner 3 года назад

Yeah, I was so happy that he decided to admit it!

@johannschiel6734 3 года назад

A parker monomatch game...

@Intermernet 3 года назад

God may not play dice, but he definitely plays "spot the happy little house".

@IRONMANFAN-oc9fr 3 года назад

He said in the video that maths is all about spotting patterns and he has inadvertently PROVED this very fact! HAHAHAHAHAHHAHAHAHA

@matheuscastello6554 3 года назад

the fact you printed the first 101 rows on accident is the cherry on top of an already amazing and hilarious video, i loved it hahaha

@miriamrosemary9110 3 года назад

Totally

@SquintyGears 3 года назад

😂 The unintended print of spot the atom had me crying

@Verlisify 3 года назад

So find century old math columns and make card games out of them Interesting business venture

@golightning291 3 года назад

a game for -6 people? sounds like my social circle

@mymoomin0952 3 года назад

"I'm not sure if that's genius or lazy" The soul of mathematics right there

@dragoncurveenthusiast 3 года назад

absolutely! nicely spotted

@ChazCharlie1 3 года назад

I was going to say engineering

@LadyPelikan 3 года назад

Ooo. Deep.

@Koisheep 3 года назад

It's so refreshing to find a maths channel that keeps coming up with new topics you didn't know about despite being a phd student lol

@SimonBuchanNz 3 года назад

It's so refreshing to find a maths channel that came up with a subject I *did* already know about! (projective geometry being a big thing in 3d rendering) If not something I would ever think to try to apply in this context.

@hugofontes5708 3 года назад

@Hopeful Interpretation doesn't take a lot of genius to at least know about trendy or popular topics in your own field that are covered by RU-vid channels for views and popularizing academics, specially when the channel actually surprises you on the regular. Or does it?

@r0cketplumber 2 года назад

"Let n be an integah!" That's how you get people hooked! What an opener! I hooted at that.

@cj719521 3 года назад

Paused at 7:00 to say this: Okay, but how long did it take to put the 7x7 Feno plane in order like that? The amount of detail you consistently put into these videos is astounding (and so satisfying)! Thank you for the work you do!

@liborkundrat185 2 года назад

My guess is: - The start was to separate all cards with a single symbol, in this case the clown. This left him with 49 cards to be put into the grid and 8 involving the clown to be left on the outside. - Then he searched for 7 cards with a shared symbol among the 49, putting them into a single row. - Then he searched for 7 cards with a shared symbol among the remaining (42) cards, putting them into another row. - Then he repeated the previous step, chopping the amount of remaining cards down to 35, then 28, afterwards 21, 14, and finally the bottom row of 7. - Then he rearranged all symbols within each row so there was a shared symbol (same match) in the whole column. And by process of mathematics, that should be enough to get the final picture, as the symbols in the diagonals are defined by the rows and columns. So, it probably didn't take *too* long with a system like this, but still, fairly long. Especially with two cards missing, which he only had to make (and add) afterwards.

@Trumpington1 2 года назад

@@liborkundrat185 it’s more involved than this. You’ll see if you try for real…

@Trumpington1 2 года назад

1. Choose a symbol that links infinity cards eg clown 2. Pick any card out of those 8 clown cards that will represent rows. From now on, the 7 other ’row symbols’ on that card will be common with the symbols linking each row. 3. From remaining 47 cards, arrange 1st row of 7 cards to be all cards containing one of those ‘row symbols’ 4. So the same for other rows At this stage columns don’t match and you’ll see a couple of blank spots due to having 47 card to fill 7x7 5. Pick another clown card to represent columns. 7 other symbols on card aside from clown are ‘column symbols’ 6. Keeping the rows intact reposition cards so that each column has common symbol with column card. At this stage rows and columns all match up nicely but the main top left to bottom right diagonal probably doesn’t. You can switch any row / column around to make a diagonal but you’ll probably find the parallel diagonal doesn’t match. 7. Find the main diagonal infinity card by looking for common symbol between lefthand most 2nd row card and top right card. Now rearrange grid so that main diagonal matches the common symbol between the top left and one of the other symbol on the diagonal infinity card. Don’t rearrange top 2 rows or left column during this. Should be done…! Nb for step 1 don’t choose symbol where there are cards missing eg snowman.

@liborkundrat185 2 года назад

@@Trumpington1 I see. That's pretty neat, and much more accurate/systematic than I thought. Cool for figuring it out.

@michielhorikx9863 2 года назад

@@Trumpington1 This indeed works very nicely, thanks for the algorithm!

@atomic3691 3 года назад

"Negative six players?" I don't know why, but I couldn't stop laughing.

@WesYarber 3 года назад

‘Twas a good one

@pyglik2296 3 года назад

We should switch to the correct notation [2, 8] ∩ ℤ.

@kirkanos771 3 года назад

I didnt get that joke either.

@ssnoyes 3 года назад

@@kirkanos771 It's for "2-8" players, which you are supposed to read as "2 through 8" but Matt has interpreted as "2 minus 8".

@davidgould9431 3 года назад

Similar(ish): I finished a jigsaw in 18 months - I was really pleased because it said "2 to 4 years" on the box.

@n8r8rutube 3 года назад

You really Parker Squared that print job :P

@wolfelkan8183 3 года назад

"Catch the Match" also known as "Make Fun of Your Colorblind Friends"

@yuvalne 3 года назад

@trickytreyperfected1482 3 года назад

@aviko9560 3 года назад

@sandeepwangde269 3 года назад

@francogonz 3 года назад

@F_L_U_X 3 года назад

0:04 It also says that the hour-glass is 15 feet tall.

@breberky Год назад

After spending many weeks trying to code the Dobble generating algorithm (brute force with a lot of optimization tricks, still running for long hours), the existence of the cyclic difference set literally blew my mind. Now the job is done in a second. You have saved my day! Thank you!

@alinayossimouse 3 года назад

Your mistake getting your cards printed made me really happy, not at the expense of you messing up but at the beauty of how well it ties into what we had just learned and how easy it was to make such a grave mistake

@afonsoferreira5171 3 года назад

The Parker Dobble edit: just refreshed the comments, good to know everyone thought the same

@zozzy4630 3 года назад

Parker Pentagon!

@rossradtke 3 года назад

I was gonna say its an upgrade from the Parker Square... ..."Now with FIVE sides

@anushrao882 3 года назад

That negative six got me laughing way more than it should have.

@luiscarlosqg 3 года назад

Yeah, that was funny.

@adampayton4695 3 года назад

There's also a second pair! An circle with an arrow inside! However they are different colors so maybe it's also like the "catch the match game"?

@annekay281 3 года назад

I found the same pair and if color variation was an acceptable option you would not need that many unique symbols or cards that large.

@foxylee 3 года назад

Finally, I started playing dobble five years ago, and I've asked every math teacher I know to explain it to me since.

@toughnerd 3 года назад

I never thought a pentagon could be classified as a square before... But those pentagons are the parker's square of monomatching games.

@Jordan-zk2wd 3 года назад

About that... ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-n7GYYerlQWs.html : P

@CBWP 3 года назад

"You can trick young people into becoming engineers." - Matt Parker

@Iwasneverevenhere 3 года назад

Regarding the number cards, German math RU-vidr Dorfuchs also made a video on this game. In it, he contacted the company to ask about the number of cards, and they answered that it simply had to do with printing, although I don't remember the details.

@Ulkomaalainen 3 года назад

The game company said the printers only could do 55 (well, or 110 with 53 thrown out). Why that is wasn't solved but it was also the suggestion that it is was Poker sets (or, more broadly, the standard 52 cards plus three anything - joker cards for example).

@ultimatedude5686 3 года назад

@@Ulkomaalainen My guess it that it was the 52 cards, two jokers, and that extra card they always include for branding

@IllidanS4 3 года назад

I remember that when learning about projective geometry, the lecturer actually brought this game to the lesson, I think.

@captainstroon1555 3 года назад

You just earned a sub by printing out 10302 unique symbols and 101 happy little houses.

@jubnx2781 3 года назад

I literally was wondering about this 2 years ago and still now today because we played this at the lake, I now know. Thx

@dahemac 3 года назад

I love that you have probably persuaded a renowned solar physicist to periodically throw game packages at, or to, or past you. 😁

@benjaminsmith3625 3 года назад

Physicists are big fans of particle accelerators after all!

@wellshit9489 3 года назад

They need to test how the velocity, time and mass affect the results obviously.

@vigilantcosmicpenguin8721 3 года назад

I prefer believing they actually teleported on screen on their own.

@michaeledinger8256 3 года назад

From the producers of Parkers Square: Parkers Pentagon. Laugh so hard that I cried

@reneejones6330 2 года назад

"Spot the happy little house" is MY kind of matching game. Love it!

@samp-w7439 3 года назад

I watched this a while back, wanted to generate my own dobble (for reasons which I won't go in to). I recall Matt saying cyclic difference sets are hard to generate, so I decided I would try to write some code for it. It's a simple recursive backtracking algorithm, not much fanciness. Wrote it in python and here it is: def check(nums, target): differences = 0 ind_diffs = set() mod = target * target - target + 1 for n1 in nums: for n2 in nums: diff = n1 - n2 diff = (diff + mod) % mod if diff: differences += 1 ind_diffs.add(diff) return len(ind_diffs) == differences def generate(target, current=None): current = current or [0] mod = target * target - target + 1 options = range(current[-1] + 1, mod) if check(current, target): if len(current) == target: return current for option in options: res = generate(target, current + [option]) if res: return res print(generate(8)) The code is surprisingly fast for small sizes of difference sets, but, I tried generating the length-102 set that you would need to generate Monomatch: Myriad, and it still hasn't finished running (over an hour). This makes sense, as recursive backtracking scales quite poorly (I think O(n!)), so I'm not surprised. In any case, I just wanted to share my findings. Cheers!

@Xanthaar 3 года назад

Outdone the Parker square with this one. I'm crying with laughter at the happy little houses on all the cards :)

@bluecat2991 3 года назад

So am I. It's so Matt.

@MisterNohbdy 3 года назад

*points to box* "These guys sponsored me! They're great!" *promptly tosses box onto floor*

@andyland00 3 года назад

Great video! As an engineering student, however, my inner manufacturer is pained by the fact that you chose to make your myriad out of pentagons rather than hexagons... hopefully there was some printing size limit that made the difference in wastage between the two shapes negligible?

@mgarratt101 2 года назад

It makes zero difference, obviously you're a beginner engineering student, you'll get there one day

@paulbockmann8402 2 года назад

@@mgarratt101 seems like you’re the beginner, only triangles, squares and hexagons can tile a plane without any overlap or gaps. You’ll get there one day ;)

@iteragami5078 2 года назад

Good question. It would depend on the size of the polygon compared to the roll of paper to be printed on. Cause while regular hexagons do tile the plane perfectly, they leave jagged edges at the border, so you would compare wastage to densest pentagon packing known.

@SlashCrash_Studios 2 года назад

He's Matt Parker, Pentagons are just cooler shapes

@AidanRahder 2 года назад

@@SlashCrash_Studios Hexagons are the bestagons.

@driesvanoosten4417 3 года назад

My daughter likes to play dobble with three cards. The players then have to call out the three pairs connecting them. Ofcourse, it can happen that the same symbol occurs in all three cards, which can be quite hard to spot.

@DAveShillito 3 года назад

Literally everybody watched this video and looked to the comments to see if they would be the first to post "Parker Dobble" :D

@ryjtse 3 года назад

Oh now that is delightful.

@Nosirrbro 3 года назад

Parker Match!

@esotericVideos 3 года назад

I think Parker pentagon is more apt. It suggests that with time Matt will find a way to embarrass himself with all regular polygons.

@better.better 3 года назад

Parker Plane... Parker Dobble is just ridiculous! personally I feel that the concept of a Parker plane being an infinite sequence of happy houses is very comforting

3 года назад

Nope, I went on to check who else found the smiling house. EDIT: ...and I unpaused the video and learned the truth :D :D

@TacoMaster3211 3 года назад

The Happy Little House Incident must make it into Humble Pi 2, or maybe Humble Tau if you wish.

@thegreatsalad 3 года назад

Humble Tau, love it haha

@frederf3227 3 года назад

Im holding out for for Humble 540 degrees.

@vigilantcosmicpenguin8721 3 года назад

Something about that book will come full circle.

@jordanrivera467 2 года назад

Funnily enough, I first played this game during a free day in math class, truly coming full circle with this video

@dfgaJK 3 года назад

What made finding the happy little house, it took me about 2min, is that the contrast/saturation is sightly diffrent. (or at least it steamed to be in the image of you holding them up.)

@DannyGottawa 3 года назад

Paraphrased Matt: 'Just make the two extra cards yourself.' Couldn't I just make them all? Nervous Matt: Shhh

@PauxloE 3 года назад

There are dobble/spot-it generators on the internet. Upload a set of icons (use your own ones so there are no copyright issues), get the cards, print them. My wife made some with fruits and vegetables.

@RubenCeuppensOfficial 3 года назад

Steve's face at the end when he realises, is hilarious.

@nitehawk86 3 года назад

The face of someone that isn't sure if they are being trolled.

@garrettthompson3286 3 года назад

5:55 I was fully ready for a surprise diagonalization argument like Cantor's

@Mulakulu Месяц назад

3 years and you've grown by 200.000 subs. You deserve so many more

@myrusEW Год назад

This sounds like an EXCELLENT programming challenge.

@snipperjoey1151 3 года назад

Honestly I'm proud I spotted the little house in about a minute.

@miriamrosemary9110 3 года назад

I looked for quite a while and couldn't find it. Good job!

3 года назад

Likewise, I found it in a minute or two. But it could have taken a lot longer, it was just luck. EDIT: ...and I unpaused the video and learned the truth :D :D

@vigilantcosmicpenguin8721 3 года назад

I think the trick was to search through each color.

@HeVi7 3 года назад

That's a Parker Square of a game you've printed there 🤔

@anarchyseeds4406 3 года назад

Wow that is hilarious Matt. I was amazed how fast you matched the happy little house but that outcome is truly comedic.

@ethanlivemere1162 11 месяцев назад

Years ago, I counted how many times every symbol appeared. Most were 7 or 8, but the snowman only appears 6 times. I'm glad I finally know why - it's because there's 2 cards missing from the snowman line.

@HugoHobertson 9 месяцев назад

A nice side effect of having 55 cards is that you're dealing 54 cards to the players and 54 is divisible by 2,3,4 and 6, so when you have those amounts of players you can divide them fairly.

@noetix 8 месяцев назад

I came to the comments to say the same 😂

@richardwithanarr 3 года назад

I like how Matt frames himself sitting in front of the circle artwork behind him. Santino Parker, patron de numeros calculadores

@dansushi 3 года назад

In addition to the happy house, there's also a matching arrow with a circle around it!

@spectralpiano3881 3 года назад

I also found the arrow in the circle first, but after closer inspection they don't actually match, the left version has slightly longer arrow head lines than the right version. I was confused when he then told it was the happy little house xD

@haulin 3 года назад

Maybe they also have to be the same colour. I imagine it cannot be easy to come up with 10303 unique symbols.

@somefreshbread 3 года назад

"Friends of mine who have procreated" Yep. This is a math channel.

@Ulkomaalainen 3 года назад

Possible. Ehm, what is this "friends of mine" thing?

@JojoStyle_ 3 года назад

The reason why there are only 55 instead of 57 cards in the deck is simply, that the printing firm which printed the cards used sheets of paper with 55 stencils in each.

@pierrestober3423 3 года назад

Normal playing cards usually have 55 cards in them, 52+2 jokers +1 rules card or 52+3 jokers. I figure that might have something to do with it.

@JojoStyle_ 3 года назад

@@pierrestober3423 I actually called the manufacturing firm here in Germany and asked them :D Note sure why they have sheets with "only" 55 stencils on them tho

@Kamikater2 3 года назад

@@JojoStyle_ thought something like that because 57 is 3*19 pretty bad for layouting, but 55 with 5*11 is quite a bit better. Same goes for the 31 cards 1*31 (prime!) and 5*6 for the 30 cards of the childs version.

@haulin 3 года назад

I thought it might have something to do with patents. I wouldn't be surprised if someone patented a method of placing 57 symbols on 57 cards, and doing 55 might just be different enough.

@ConstantinErckenbrecht 3 года назад

@@pierrestober3423 regular playing cards are actually printed on 7x8 = 56 card sheets. If you google for uncut playing card sheet you can find some pictures.

@hapticflapjack 3 года назад

The thrower should get a credit. (And the filming location looks lovely too.)

@Riley_7237 3 года назад

Omg. Steve’s reaction XD

@jasonrubik 3 года назад

Next road trip : Dad: I spy with my little eye, an atom !!! Kid : At least its not the scary clown ! Dad : He's too far away, I can't see him yet ! Edit. just finished the video... its one of the funniest ever from Matt !

@jeffreybernath6627 3 года назад

This is the hardest I've ever laughed at a RU-vid video. Matt, thank you for telling us about the smiley house in the top row!

@F_L_U_X 3 года назад

7:30 It's like light going through a prism and showing the rainbow.

@jessefraser1968 3 года назад

You could use Steiner triple systems to construct a STS-mono-matching game using both the Bose and the Skolem constructions. It follows that given a natural number n, such that n is congruent to 1 or 3 modulo 6, a STS-mono-matching game can be constructed, such that it has n cards and (n(n - 1)) / 6 symbols. Furthermore, there will be n / 2 symbols per card.

@maxd.9677 3 года назад

Yes. I was missing a mention of Steiner systems or design theory :-)

@jaymoney5090 3 года назад

28:25 "They're all smiley house" Always have been

@reformCopyright 3 года назад

"Let n be an integer!" And the crowd goes wild!

@rafaelrios5228 3 года назад

Oh wow, I've just seen the water computer and this video released right after

@EPMTUNES 3 года назад

I love the frequent Matt/Steve uploads!

@sugmadic7649 3 года назад

@gaborgaborfi2395 2 года назад

cos of duality, u can play double with symbol pairs: they only appear on one card together. u get this with switching the edges and vertexes on the plane

@paulsalomon27 3 года назад

Being on the inside of game manufacturing, I can tell you that those 2 cards could double printing cost if they require a second sheet. So I’m very confident that is the reason they only have 55. Then again I have been wrong in the past.

@oz_jones 2 года назад

That is what they told to a German RU-vidr, DorFuchs. While "doubling" the cost seems a bit exaggeration, I can totally believe that the cost would rise significantly.

@rmsgrey 9 месяцев назад

@@oz_jones If they can fit 55 cards on a single sheet, then going to 57 would require printing two sheets per set (or doing something unusual and complicated to avoid throwing away 53 blank cards per set) which would, to a first approximation, double the cost.

@matthewmiller6979 3 года назад

"I'm not sure if thats genius, or lazy." Why are you saying that like those are mutually exclusive?

@neruneri 3 года назад

My favorite kind of genius is the one who finds incredibly innovative ways to be lazy!

@guiorgy 3 года назад

Genious stems lazyness and a bit if crazyness

@vigilantcosmicpenguin8721 3 года назад

The two overlap more often than not.

@Keneo1 3 года назад

Nono, it’s an inclusive or, otherwise he would’ve have said XOR ;)

@TheFranciscoFm 3 года назад

That's how life works. Doesn't matter how hard you try something, you will always end making a "spot the atom game".

@MrLordFireDragon 3 года назад

New question: If Matt wanted to print a copy of his game where every match was on a different symbol, what system should he have used to choose squares on his grid?

@meneldal 3 года назад

I'm so sure it's perfect, but with so many cards I'd say go with 1,2 from first row, 3,5 from second row, 6,9 from third row and so on. It will avoid more than 2 matches on rows and no column matches, plus the increasing distance should avoid some of the diagonal ones. Or just run an algorithm that counts symbol occurrences as you pick cards, if it ever goes over 2 skip the card.

@OscarCunningham 3 года назад

en.wikipedia.org/wiki/Oval_(projective_plane)

@NicholasA231 3 года назад

I put off watching this video until I had half an hour. There was no disclaimer about setting aside 8 extra minutes to find the matching damn houses.

@ChristianBehnke Год назад

"Spot the happy little house" is my favourite new game! 😂

@gusiguess 3 года назад

I think there may be a mistake on the monomatch myriad cards he shows. They seem to be duomatch cards. There's the little house but there seems to also be the arrow in a circle. Its top right edge of the card on our left. Maybe they are slightly different but that's too close.

@MrKassieboy 3 года назад

I think they are a different color

@unusedTV 3 года назад

"Spot the happy little house" will become a bonus chapter in the next edition of Humble Pi - which I really enjoyed, by the way!

@michaellee7313 3 года назад

"Friends of mine who have procreated" - Matt Parker 2021

@calinguga 3 года назад

he said friends* though

@michaellee7313 3 года назад

And this is why I need to stop writing comments at 4am

@bwah9481 2 года назад

I played this game a bunch of board game arena and it boggles me how there was ALWAYS a match despite there being so many symbols.

@ideegeniali 3 года назад

I tried hard (well not actually that hard, i gave up quite soon actually) to find the math of dobble. Then concluded i didn't have the math instrument to deal with what at first looked like a simple combinatory problem. Thank you for explaining in such an entertaining and multiple approaches way!

@Naftoreiclag 3 года назад

ok now this is epic

@toppocket2856 3 года назад

Great to see Matt channeling The Head from Art Attack when revealing his mistake.

@skylark.kraken 3 года назад

At christmas we had this game, and after playing it with my nephew I set out on solving how it worked, I found the rotational answer as it's a technique in programming. I didn't realise that it was a big deal

@miguelescalantemilke7204 3 года назад

Now I’m really curious on how it can be used in programming:0

@SimonBuchanNz 3 года назад

As a programmer, me too! Some sort of perfect hashing?

@trans_foxgirl 3 года назад

I'm reminded of a CRC but I'd implement that in hardware instead of software

@skylark.kraken 3 года назад

@@miguelescalantemilke7204 Well, I've used it more for programming challenges like on Codewars and there was an Advent of Code question which was a lot simpler solved like that. I can't remember an exact use, but it's probably limited outside of games.